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Wrapping Test System for CNH Round Balers

1. TEM PART NUMBER DESCRIPTION 1 pasero TUBE 2 pasa SUPPORT All Dirnensions in inches Tolerances Project or Class MEEG 401 Senior Design Unless Otherwise Sponsored By CNH America LLC Noted Decimal Drawing Title XXX 005 Exon z X 059 Dts By CNH Design Team Date 10 31 11 1 32 Material dai Angular Scale EE 15 DWG NO0 84567084 05 Deg rm Billing Account 84567084 Weld Assembly 4 Tube WA 57 ITEM E PART NUMBER DESCRIPTION 54560725 Outer Telescoping Tube Pneumatic Cylinder B Support Sheet ES All Dimensions in inches Tolerances Project or Class MEEG 401 Senior Design Unless Otherwise Sponsored By CNH America LLC Noted ATE DrswingTile 84567085 Weld Assemby 5 XXX 005 TUBE W A TERELI 5 X 050 DrawnBy CNH Design Team Date 10 31 11 Angular Scale 1 2 DWG NO 64567065 0 5De E Billing Account NEM PART NUMBER DESCRMON ary All Dimensions in inches Tolerances Project or Class MEEG 401 Senior Design Unless Otherwise Sponsored By CNH America LLC Noted Decimal Drawing Title 34567088 Weld Assembly 6 XXX 005 TUBE WA XX 010 X 05 D amp B BY CNHDesignTeam Date 10 81 11 sae Angular Scale 1 2 Dwe No 84567088 No 84567088 0 5 Deg Billing Account ITEM NO PART NUMBER DESCRIPTION Tray Support 2 84567089 Rod All Dim ensions in inches Tolerances Projector Class
2. TE m 7 hM m po All Dimensions in inches EE 0 902 9 Tolerances Project or Class MEEG 401 Senior Design i Unless Otherwise Sponsored By CNH America LLC 1 234 SES Drawing Title iE 1 202 84560701 Gusset Plate SHTI I Drawn By CNH Design Team 10 31 11 CUL eee 72 Ei Dae OT ari TT ESTESA Materi al c Eug ASTM A1011 Quantity Angular Scale J DWG NO 84560701 0 5 Deg Billing Account 64 il V y E AA EREN Mm i A d V Tolerances Unless Otherwise Noted Decimal XXX 005 XX 000 X 050 Fractional 1 32 Angular 0 5 Deg Sheet 2 of 2 All Dimensions in inches Project or Class MEEG 401 Senior Design Sponsored By CNH America LLC Drawing Title 84560701 Gusset Plate SHT2 Drawn By CNH Design Team Date 10 31 11 CSTYPEB Scale 1 2 DWG NO 84560701 Billing Account 65 a a oa All Dimensions in inches Tolerances Project or Class MEEG 401 Senior Design Unless Otherwise Sponsored By CNH America LLC Noted Drawing Title Decimal 84560722 Main Bar Spacer XXX 005 XX 010 Z ap Drews By CNH DesignTeam pate 10 31 11 ae m BWO NO 8450722 Billing Account 66 All Dimensions in inches Tolerances Project or Class MEEG 401 Senior Design Unless Otherwise Sponsored By CNH America LLC Noted Drawing Title 84560721 Vertical A
3. Tractor with PTO hookup Baler with PTO driveshaft Pneumatic air supply Assembled prototype The facilitators of this test are the four members of the CNH design team 24 Customer Want Design is Safe to Use Metric Number of Pinch Points Exposed to Operator Target Value 0 Pinch Points Objective of the Test The objective of this test is to provide a way to verify there are no accessible pinch points to the user during assembly or automation of the mechanism Description of Test Rationale The user has been provided a safe working distance from any pinch points to prevent injury These pinch points are the six points of contact between the six pneumatic wheels and the baler roller as well as the three pinch points created between the pneumatic cylinders and their respective pushing blocks Experimental Plan Validation of this metric was designed into the mechanism The mechanism will be assembled and automated to verify that a safe working distance from pinch points has been incorporated in the design Procedures During the setup of the automation process the user would be using a pressure regulator away from the baler to provide the necessary pressure to the pneumatic cylinders This creates the pinch points between the pneumatic cylinders and the pushing blocks and translates this pressure to create pinch points between the pneumatic tires and the baler roller For this test plan order the possible pinch points and d
4. It was observed that the pinch points closest to the operator at any time were those between the pneumatic cylinders and pushing blocks This pinch point was measured to be 17 2 inches from the edge of the baler Since none of the pinch points were less than 12 inches from the edge of the baler the user is not in danger of injury as long as they adhere to the user s manual and remain outside of the bale chamber during operation Validation test passed and customer constraint met 41 Customer Want Design is Cost Effective Metric Cost of Prototype Constraint 5000 Target Value 3000 Overview of Test This test was simply a calculation of the total cost to create an assembled prototype Costs included purchased parts raw material costs for fabricated parts machining costs per hour welding costs per hour and administrative costs per part Data Collection Displayed below is the list of all purchase parts costs fabrication costs welding costs administrative part number costs and steel product costs by weight Table 24 CNH P Part No Description Qty Price ea Notes No are Cost Pneumatic Wheel with Two Piece Rim 8 9 X 2 8 dd Center Hub 1 Axle Roller Bearing 295 Capacity E 39 57 33906112 RE Zinc Plated Steel U Bolt 1 2 13 X 1 1 2 Thrd 3043T51 Length for 4 1 2 OD 20208 WII 2 4 15 84506709 8 30 6498K252 Stainless Steel Air Cylinder Nose Moun Spring 3 69 79 84
5. Angular Scale 1 10 DWG NO 84567080 t 0 5 Deg EHI Billing Account Drawing Title 9 567080 SUB ASSEMBLY 2 TIREA PART ITEM NO numpger DESCRIPTION QTY Main 54560678 Support Bar All Dimensions in inches Weld on all four Tolerances Project orClass MEEG 401 Senior Design BFS Unless Otherwise Sponsored By CNH America LLC Noted Decimal 84560723 WELD ASSEMBLY 1 XXX 005 TUBE WA FOL e X x05 Dm9 nBy CNHDesignTeam Date 10 31 11 Suis Angular Scale 1 10 DWG NO 84560723 0 5 Deg Billing Account Drawing Title PART NO NUMBER DESCRIPTION 84560701 PLATE PLATE Vertical Bar 2 84560721 uA Spacer 3 84560722 Main Bar Spacer All Dimensions in inches Tolerances Project or Class MEEG 401 Senior Design Unless Otherwise Sponsored By CNH America LLC Y Noted cna Drawing Title 34547082 WELD ASSEMBLY 2 XXX 005 PLATE RH WA XX 010 i X x05 DremBy CNHDesignTeam Date 10 31 11 eine Angular Scale 1 2 DWG NO 8456708 0 5 Deg Billing Account 55 Weld on Back Side Weld Plates so Holes Align E pee All Dimensions in inches Tolerances Project or Class MEEG 401 Senior Design Unless Otherwise Sponsored By CNH America LLC Noted No unmper DESCRITION arv erus Ral NUMER EES CRIETION SIE Decima Drewine Title 245 7083 ASSEMBLY 3 XXX 005 PLATE LH WA 7 AT 1 Fractional Anglu Sele 12 pwe NO 84567088
6. MIEEG 401 Senior Design Unless Otherwise Sponsored By CNH America LLC Noted Drawing Title 4567090 Weld Assembly 7 Drawn By CNH Design Team Date 12 10 11 Angular Scale 1 15 DWG NO 84567090 0 5Deg SE Billing ccount 1 32 60 All Dimensions in inches Tolerances Project or Class MIEEG 401 Senior Design Unless Otherwise Sponsored By CNH America LLC Noted Drawing Title 84560703 HORIZONTAL BAR TUBE Drawn By CNH Design Team Date 10 31 11 ial SQR Tube ASTM A500 itv im Wie EEE Angular Scale 1 20 DWG NO 84560703 0 5Deg ae Billing Account 61 All Dimensions in inches Tolerances Project or Class MEEG 401 Senior Design Unless er me Sponsored By CNH America LLC Note SHEET Drawing Title 4560697 Foot Piece KAK ENDS XX 010 X osp Prawn By CNH DesignTeam Soon 1 32 Material CD Flat ASTM A108 1018 Angular Scale 1 2 DWG NO 84560697 0 5 De E Billing Account 62 4x0 105 D EE All Dimensions in inches Tolerances Project or Class MEEG 401 Senior Design Unless Otherwise Sponsored By CNH America LLC Noted Drawing Title Decimal 84560698 MAIN SUPPORT BAR XXX 005 TUBE EDEN v3 O10 Drawn By CNH Design Team Date 10 31 11 1 32 Material SQR Tube ASTM A 500 Grade C Angular Scale 1 10 DWG NO 84560698 0 5Deg m Billing Account 63 Sheet 1 of 2
7. lt lt Zz lt lt lt lt lt lt lt Zz lt lt lt lt lt lt lt e e O Analysis Observing the above data it can be seen the netting is consistently pulled between the initial starting lengths of 3 10 inches and is not pulled at an initial starting length of 1 inch Though at an initial net starting length of 2 inches the testing yielded inconsistencies pulling the netting To determine how consistent the netting is pulled a reliability test was completed and revealed that the netting would be pulled 66 67 of the time with an initial starting net length of 2 inches The reliability tests also revealed the netting is consistently pulled a minimum initial starting length of 3 inches while the netting is not pulled at a minimum initial starting length of 1 inch 37 Reliability successful trials trials conducted x 100 Reliability 4 successful trials 6 trials conducted x 100 Reliability 66 67 Conclusion Based upon these results it can be concluded the shortest initial net length that can be consistently pulled is 3 inches A minimum initial starting length of 2 inches does not yield a high enough reliability to confirm it can be consistently pulled through the system As a path forward more tests need to be completed to confirm these results These conclusions suggest the target value of a minimal initial net length of 1 inch has not been satisfied Though
8. 17 4 Ibs 17 4 Ibs 17 4 Ibs and Hardware 2 Weld Assembly 1p Lag 2 17 4 Ibs 17 4 Ibs 17 4 Ibs 17 4 Ibs 17 4 Ibs 17 4 Ibs and Hardware 3 Shaft 9 0 Ibs 9 0 Ibs 9 0 Ibs 9 0 Ibs 9 0 Ibs 9 0 Ibs 4 Tire 1 4 2 Ibs 4 2 Ibs 4 2 Ibs 4 2 Ibs 4 2 Ibs 4 2 Ibs 5 Tire 2 4 2 Ibs 4 2 Ibs 4 2 Ibs 4 2 Ibs 4 2 Ibs 4 2 Ibs 6 Tire 3 4 2 Ibs 4 2 Ibs 4 2 Ibs 4 2 Ibs 4 2 Ibs 4 2 Ibs 7 Tire 4 4 2 Ibs 4 2 Ibs 4 2 Ibs 4 2 Ibs 4 2 Ibs 4 2 Ibs 8 Tire 5 4 2 Ibs 4 2 Ibs 4 2 Ibs 4 2 Ibs 4 2 Ibs 4 2 Ibs 9 Tire 6 4 2 Ibs 4 2 Ibs 4 2 Ibs 4 2 Ibs 4 2 Ibs 4 2 Ibs 10 18 Shaft Collars 3 0 Ibs 3 0 Ibs 3 0 Ibs 3 0 Ibs 3 0 Ibs 3 0 Ibs Inner Telescoping Tube a 11 with Pushing Block a and 5 2 Ibs 5 2 Ibs 5 2 Ibs 5 2 Ibs 5 2 Ibs 5 2 Ibs Hardware Inner Telescoping Tube b 12 with Pushing Block b and 5 2 Ibs 5 2 Ibs 5 2 Ibs 5 2 Ibs 5 2 Ibs 5 2 Ibs Hardware Inner Telescoping Tube c 13 with Pushing Block c and 5 2 Ibs 5 2 Ibs 5 2 Ibs 5 2 Ibs 5 2 Ibs 5 2 Ibs Hardware qd Tay along with Struts 11 2 Ibs 11 2 lbs 11 2 Ibs 11 2 Ibs 11 2 lbs 11 2 lbs and Hardware Assembled Horizontal Bar with Tray L Brackets a and b Gusset Plates g5 WelurAssemblies 1276 47 4 Ibs 47 4 Ibs 47 4 Ibs 47 4 Ibs 47 4 Ibs 47 4 lbs Pneumatic Cylinders a b and c Cylinder Brackets a b and c and Hardware Total 146 2 Ibs 29 Parts that were weighed but not added to the total system since th
9. 49 Combining Assemblies As the main assembled device is sitting inside the baler secure the foot pieces to the axel with two U bolts Now rotate the device out of the baler so that the main support bar rests on the floor Secure the three pneumatic cylinder brackets to the outer telescoping tube weld assembly 5 with remaining hardware Rotate the device back into the baler Fit and bolt the steel blocks into place so that the pneumatic tips are able to actuate and press against the blocks within at least two inches Clamp both sides of the horizontal bar weld assembly 4 to the outer frame of the baler with C clamps Next the tray should be brought into the back of the baler After being bolted at the top to the L bracket the bottom can be situated and bolted into place You have now assembled the machine and can begin testing once air is applied to the pneumatic cylinder and tires Setting up the Machine Two operators will be needed to lift the machine off of the ground and onto the axel From there one person can easily rotate the machine into the baler until the ends of the horizontal bar press firm against the outer walls of the back end of the baler The operator can then begin to secure the foot pieces to the axel with U bolts and clamp the top ends to the frame with C clamps Next all three pins preventing the telescoping tubes from sliding would have to be pulled out The operator would then connect the hoses to the back end of t
10. 7 81 98 2 40 377 0 109 33 3 50 471 2 136 648 4 60 565 5 163 99 5 70 659 7 191 31 6 80 754 0 218 66 7 90 848 2 245 98 8 100 942 5 273 33 9 120 1131 0 327 99 From the result table above it is seen that the netting will be pulled with 150 pounds of force at a little less than a pressure of 60 psi that is applied to each pneumatic cylinder It was seen that when tests were run at 1000rpm engine speed half PTO rated speed the netting could be pulled at max pressure 120psi The slack was then completely out of the netting system and tests were run to find the critical pressure The pressure was decreased by 5psi between tests and the duckbill was not moved to assure that tension was not lost within the system and no slack was present It is critical that no slack is present in the netting line because the ripping was found to occur when loose netting was pulled and the tension was applied as a shock to the system It was found that the design successfully pulled netting under these ideal conditions at as low of cylinder pressures as 45psi This actually exceeds the predictions of between 50 and 60psi This discrepancy can be accredited to the coefficient of friction used in the calculations The actual coefficient of friction must have been higher than that which was measured in phase 3 This result is good as it allowed the team to design with a conservative friction coefficient 40 Customer Want Safe to Use Metric Numb
11. Metric Speed of Prototype Roller Target Value Equal to the Baler Roller Speed Objective The objective of this validation test is to determine if the prototype speed matches a preset PTO hence the baler speed At a given PTO speed the baler rollers and the prototype rollers should have the same surface velocity To perform this test the team will measure the angular velocity of the prototype and the baler roller using a tachometer These results will be used to find the tangential surface velocity of both the tires and the baler roller The speeds should match with 95 confidence Procedure e Power the tractor and with the PTO set at zero connect all the baler fittings to the tractor e Attach the prototype to the baler and actuate the pneumatics slightly e On exposed surface of the prototype tire mark up a bright spot for later use with the laser to measure rpm e Start the tractor and set its engine speed to 2000rpm e Turn on the PTO and allow the baler to begin rotating The prototype wheels should roll with the baler roller e Using the tachometer measure the angular velocity of the baler roller and each of the six tires on the prototype e Record ten measurement trials of the tire rpm in the following table Table 7 Tire Tire Angular Velocity Baler Roler Angular rpm Velocity rpm 1 2 3 4 5 6 14 e Repeat the above procedure with the tractor PTO set to 1500 1000 and
12. P pe reading of the pressure Loose fittings with the Cylinder Total failure of the Use the teflon taping during hoses or weak valve k Leak fiiath prototype to pull the assembly of the pneumatic TT bir a netting connectors loss of operation of installation of a pressure gage with a excessive pressure the prototype relief valve Pneumatic weathering loss of air pressure ous appels al Ho pneumatic hoses to UV light i Re routing and securing pneumatic tires Figure 7 FMEA Matrix 45 Path Forward and Transition Plan for Sponsor Though the prototype has satisfied the majority of the constraints there are a few aspects of the prototype that propose concerns for future use These concerns require modifications to be made to allow the prototype to function more efficiently Updated CAD drawings containing corrections will be provided to the sponsor The concerns and necessary revisions are discussed below Height Concern The prototype has been designed to the specifications of the round baler presented to the design team for testing This round baler s tailgate is detached and the prototype has been designed without the height constraint of the tailgate s rubber belts Installing the prototype into a round baler at the CNH Research and Development Facility may present problems due to the height constraint presented by the tailgate rubber belts Revision The prototype should be installed into the baling cha
13. Telescoping Tube Secure the tube with Steel Shaft Collars 84560713 on both sides 2 Slide a total of 4 Tires 84560712 onto the shaft Place 2 tires on each side of the center Inner Telescoping Tube securing each wheel with collars on each side Place wheels at equal distances apart from each other 3 Attach the two other Inner Telescoping Tubes onto the shaft one on each side of the shaft and secure with collars on each side of both bars 4 Slide the remaining two wheels onto the shaft one on each side of the shaft Secure these wheels with collars and create equal spacing between all shaft components 5 Bolt Pneumatic Cylinder Bracket 84560729 with Pneumatic Cylinder 84560728 attached to the welded plate found on the Outer Telescoping Tube 84560725 by using two 5 16 bolts Do this for all three Outer Telescoping Bars 6 Insert Inner Telescoping Bars into respective Outer Telescoping Bars Sub Assembly 3 Part No 84567081 1 Attach Tray Connector Piece 84560715 to the outside wall of Tray 84560716 using bolts One connector piece is attached per side of tray Final Assembly Part No 84567087 1 Attach Sub Assembly 2 84567080 to Weld Assemblies 2 and 3 by inserting the Outer Telescoping Tube between the two weld assemblies and fixing the three pieces with two bolts The main fastener is a 7 bolt and the other used to locate the angle of the outer telescoping bar is a 4 bolts 2 Connect Sub Assembly
14. a wider tray 2 more tires more adjustability for the tray on the main bars and a support beam for the tray Figure 8 48 User s Manual Assembling the Machine Assembly 1 Start with the horizontal bar Easily bolt on the two small L bracket tray support pieces near the ends of the horizontal bar Then begin to force all three vertical attachments weld assembly 6 s into place and secure them with bolts and flanged nuts The next step would be to secure all six gusset plates weld assembly 2 and 3 to the vertical attachments Next set the main support bars and foot pieces weld assembly 1 in between the outside pairs of gusset plates and secure them when the feet are sitting flush with the ground With washers bolt the outer telescoping tubes inside the gusset plates while giving a little bit of slack to later find the desired angle Assembly 2 Slide the shaft through one of the inner telescoping tubes Slide necessary collars and two tires on before sliding the shaft through another inner telescoping tube Repeat the previous step and slide the last steel collars and tires onto both ends of the shaft Do not secure any steel collars to the shaft at this time Begin to line up all three inner telescoping tubes with the three outer telescoping tubes Slide the inner tubes into the outer tubing at the same time until one of the tubes can be pinned from the side Proceed to pin the other two tubes to secure the bars from sliding when
15. because the mechanism is able to pull a minimum initial net length of 3 inches the constraint has been met ultimately validating the mechanism has fulfilled this metric requirement 38 Customer Want Successfully Pulls Netting from Baler Metric Pulling Force Target Value 150lb Overview of Test This test was created to determine if the device could successfully pull the netting from the baler This was quantified by pulling force This would be measured by determining the pressure at which the mechanism could successfully pull netting from the baler This yes no result could then be used to determine the critical cylinder pressure at which operation should occur and if the design meets the customer want of successfully pulling netting from the baler Results When using the white roll of netting with two orange stripes Table 21 Calculated Netting Pulled at Netting Pulled at Netting Pulled at Trial pressure Normal Force Engine Speed of Engine speed of Engine speed of psi Ib 2400rpm Yes No 2100rpm Yes No 1000rpm Yes No 1 30 282 7 No No No 2 40 377 0 No No No 3 50 471 2 No No No 4 60 565 5 No No No 5 70 659 7 No No No 6 80 754 0 No No Yes 7 90 848 2 No No Yes 8 100 942 5 No No Yes 9 120 1131 0 No No Yes Conclusion From these results our team cannot conclude that our metric is validated The net was successfully pulled at 1000rpm engine speed but it is required
16. better and be an even more viable solution to the initial problem 50 Appendix The following is an updated drawing package for the revised design DESCRIPTION GTY Babe roaa ce Sap e amey 84560710 ANGLE All Dimensions in inches Tolerances Project or Class MEEG 401 Senior Design Unless Otherwise Sponsored By CNH America LLC Noted Drawing Title 84567087 Final Assembly ASSEMBLY Drawn By CNH Design Team Date 19 31 11 Rossa AIROREBY Angular Scale 1 10 DWG NO 84567087 0 5Deg ars Billing Account 51 Tolerances Unless Otherwise Noted Decimal oe hes IS xX 010 050 X Fractional 1 32 Angular 0 5Deg TEM PART NUMBER DESCRIPTION QTY mn Weld 2 Assembly 1 Weld Assembly 2 Weld Assembly 3 2 84567082 9 basses Weld 4 ass7004 Assembly 4 EX Weld All Dimensions in inches Project or Class WEEG 401 Senior Design Sponsored By CNH America LLC Drawing Title 84560724 SUB ASSEMBLY 1 FRAME A DWG NO 84560724 52 TEN PART NUMBER oescrentonfar prem 1 Shaft END Gr peas e pem rere n ia 84560708 dre POSES Weld res Assembly 5 Bracket for 7 184560704 poe ae linder All Dimensions in inches Tolerances Project or Class MEEG 401 Senior Design Unless Otherwise Sponsored By CNH America LLC Noted Decimal XXX t 005 26 ax Lift x F 050 Drawn By CNH Design Team Date 10 31 11
17. between different types of netting and how different results should be expected This concern should also stress the importance of the contact surface area created between the tires and baler roller Different types of netting may require larger contact surface area due to net strand orientations Because of these different net strand orientations more vertical strands may be consistently pinched for one than compared to another The amount of netting left on the netting roll should also be a possible cause of concern due to the fact that rolls of netting with larger diameters require a larger inertia to overcome Weight Concern The weight of the prototype exceeds the weight constraint by 47 pounds This excess weight does not allow the facilitator to easily maneuver or install the prototype into the baling chamber Revision Weight could be reduced with different material selection methods An example of this is by fabricating the tray out of aluminum rather than steel Steel was used because of convenience but further investigation into materials selection could reveal that lighter materials could be used to construct structures and reduce weight Some of these structures that should be investigated include CNH Part Number 84560697 84560698 84560701 84560702 84560716 An overall investigation is required to determine other methods to decrease the weight of the prototype Figure 8 below shows a 3D model of the updated design Changes include
18. to pull the netting at PTO speeds of 540rpm 2000 2100rpm engine speed and above Although these test were performed by laying the netting over top of the main roller by hand and starting the PTO In this case the tires are already pressed onto the netting before the PTO is started which may create a sudden shock jolt on the strands of netting that are being pinched between the tire and the roller This may be the cause for the ripping 39 The first roll of netting that was used contained blue and white strands and revealed that it could be pulled at the PTO rated speed of 540rpm in the same situation as laying the netting over the roller by hand Unfortunately the supply of this roll was limited and ran out before testing could be performed Also when the team performed tests on the minimal length of net it was found that the netting was pulled at 540rpm PTO speed with three inches of netting exposed The tests at CNH will be performed under these circumstances meaning the net will be fed in through the rollers by a duckbill and pulled out by hand After completion of the tests and keeping these other key factors in mind the team feels the tests could be redone to hold more variables constant These tests could also be redone to cater to CNH s plans so that use of the prototype is more relevant to them Table 22 Trial Pressure psi Calculated Normal Force Ib Calculated Pulling Force Ib 1 30 282
19. 3 84567081 to Sub Assembly 1 84560724 by attaching the Tray Connector Piece to the L Bracket Tray Support by means of bolts 3 Insert 7 bolts into locater holes in the lower portion of the Main Support Bar Tighten the bolt to the Main Support Bar with a nut 4 Rest Tray on bolts attaches to Main Support 5 Secure prototype to baler by two means Attach Foot Pieces to baler axle using U Bolts 84560709 Clamp to baler walls using bolts which connect Sub Assembly 1 to Outer Clamp Piece 84560717 6 Connect Air Hose 84567076 to the Pneumatic Cylinders 84560699 using the threaded ports on the back of the cylinder Three hoses will now run out of the design one from each cylinder 7 Connectthe three hoses to the 3 Way Air Splitter 84567076 and then fix another hose to the connected end This hose runs to the Pneumatic Regulator 84560728 From the regulator connect a hose to the Air Toggle Valve 84567077 Connect hose to the other end of the valve and connect that to the air supply 8 The prototype should be ready to operate Figures 1 6 provide several different views of the assembled prototype as well as pictures of the mechanism sitting within the baler i c Figure 2 A side view of the prototype Figure 3 A view of the prototype secured in the baler Figure 4 A close up view of the tires within the baler of bf p n d z L3 Figure 5 A close up view of the pneuma
20. 500 PTO speeds e Measure the distance traveled on the baler roller by the tire through one complete tire revolution Analysis Using the results from the test calculate the ratio of the baler roller to tire angular velocities This can be thought of as a gear ratio and will help determine if the tangential speeds of the tire and roller match Calculate the mean ratio and determine the standard deviation Compare this mean and standard deviation to the ratio obtained through dividing the circumference of the baler roller by the distance traveled by the tire in one tire revolution Determine if the prototype speed matches that of the baler with 95 confidence two standard deviations Risk and Contingencies Avoid lose clothing that may be caught up in the rotating parts Resources Laser digital tachometer Prototype Tractor with PTO drive shaft Data sheet 15 Customer Want Fits within the lower part of the baler frame Metric Width and Height Target Value 4 feet Objective The objective of this test is to measure the maximum width and height of prototype to determine of the customer want of fitting within the lower part of the baler frame has been met Description of Test Rationale and Procedures This test will prove if the prototype will work within a four foot baler with the back hatch still attached Procedures to Prepare Test Samples or Materials Once the parts are all assembled while using a tape meas
21. 506699 209 37 Return 2 Bore 2 Stroke 6498K575 Foot Bracket for 2 Bore Stainless Steel Air Cylinder 3 10 00 84506704 30 00 Black Oxide Steel Set Screw Shaft Collar 1 Bore 1 Sores 1 2 Outside Diameter 5 8 Width 13 1 47 33909713 6 46 Threaded Rubber Bumper with Metal Core ade Neoprene 1 1 4 Diameter 1 2 20 Threaded Hole 3 8 76 din 526 28 Adhesive Backed Polyurethane Bumper Dome Top 95495k68 3 4 Dia 5 64 clea 1 5 53 84560727 5 53 49317142 Steel 1 1 2 Square Solid Tubing for Heavy Duty 1 43 48 Length to order 12ft 84560708 43 48 Telescoping Tube Framing 49317143 Steel 1 3 4 Square Solid Tubing for Heavy Duty 1 50 32 Length to order 12ft 84560725 50 32 Telescoping Tube Framing Air Regulator with Pressure Gauge 1 4 Pipe Size 94 4959K21 Max SCFM 5 to 150 PSI Range 1 30 90 84560728 30 90 A957K61 Mounting Bracket for 1 4 amp 3 8 Pipe Size Air 1 5 31 84560729 5 31 Filter Regulator Lubricator 5304K82 ir and Water Hose ui e Both Ends 1 4 6 11 74 Length to order 5ft 84567076 70 44 42 3662124 Panel Mount Brass Toggle Valve Inline 1 4 NPTF 1 32 69 84567077 32 69 Female 3122 15X Brass flat hex manifold w 3 coupler bodies amp 1 1 25 80 84567078 25 80 coupler plug 1502 1 4 FPT connector plug similar to Milton 728 4 1 05 84567079 4 20 150 1 4 FPT coupler body similar to Milton 715 1 3 80 84560714 3 80 Administ
22. Pull 300 450 ft min 424 ft min Weighs less than 100 Ib Weight lt 100 Ib 80 Ib Safe to Use Pinch points exposed to operator No Range 0 Pinch Points Fits within lower part of the balerframe Width fixed Aft Detachable from baler frame Number of permanent connections to baler No Range 0 Permanent Connections Uses minimal net length at start up Starting exposed net length 1 6 inches 1inch Lasts for 50000 cycles Cycles to Failure gt 50000 cycles 75000 cycles Cost Effective Cost 0 5000 3 000 Minimal time between trials Time between trials 1 5min 2min 2 3 3 5 6 7 8 9 my o The team also determined during phase III that the following requirements had to be met in order to satisfy all of the requirements set by the sponsor The metrics obtained were determined through preliminary tests performed during phase III of the design process Table 2 New Metrics from Testing Results Target Value correlated sponsor want Normal force required to pinch and pull net gt 581 Ib 600Ib successfully pulls the netting Displacement of Tire successfully pulls the netting The two new metrics directly correlate to the sponsor want for the baler to successfully pull the netting from the baler In order for the prototype to successfully pull the netting from the baler the prototype had to meet the new metrics determined during the phase III preliminary tests Consequently no additional validation tests were requ
23. The figure on the following page provides the FMEA matrix which was completed to determine what is likely to fail first within the design 44 FAILURE MODES AND EFFECTS ANALYSIS FMEA component FAILURE MODE CAUSE OF FAILURE POSSIBLE EFFECT POTENTIAL SEVERITY PROBABILITY OF OCCURRENCE OF OCCURRENCE PROBABILITY OF NOT BEING DETECTED OF NOT BEING DETECTED Risk PRIORITY NUMBER RPN PRIORITY NUMBER RISK PRIORITY NUMBER RPN PREVENTIVE ACTION PREVENTVEACTON ACTION E Regulator installed along the Excessive loading from Break loss of operation pneumatic line to provide a real time the pneumatics reading of the pressure Uneven pulling of the Regulator installed along the netting across the 7 pneumatic line to provide a real time width of the baler reading of the pressure Excessive loading from the pneumatics Regulator installed along the pneumatic line to provide a real time reading of the pressure Also avoid overpressurization of the tire to overloading by the failure of the pneumatics prototype to pull the netting Pricking due to sharp objects on the roller surface Always put the tire valve caps on uneven pulling of the during operation of the prototype netting across the Faulty nose valve in the Operator reqired qt the qui surface for sharp points prior to using the prototype Excessive pressure loss operation of the ni cp along PE burst ari on pneumatic line to provide a real time Darik PP
24. U bolt the feet to the axel and set the pneumatic hoses and regulators up to the air tanks 30 Customer Want Detachable from Baler Metric Number of Permanent Connections to Baler Target Value 0 Permanent Connections Overview of Test The objective of this test was to determine the number of permanent connections the design has to the baler This metric correlated to the customer want of the design being detachable from the baler The team decided that by quantifying the number of permanent connections to the baler it could be determined if the design is detachable or not The test counted the number of permanent fixtures to the baler A permanent attachment was defined as anything that could not be undone by simple means such as a weld or adhesion A non fixed attachment was defined as any attachment which was easily undone with standard tools for instance a clamped or bolted connection The figure below shows the results of the test Results Table 17 Connection Fixed or Not Fixed Axle Connection 1 Not Fixed Attached by U Bolt Axle Connection 2 Not Fixed Attached by U Bolt Baler Frame Connection 1 Not Fixed Attached by C Clamp Baler Frame Connection 2 Not Fixed Attached by C Clamp Total Permanent Connections 0 Conclusion It was observed that with the completed design zero permanent connections exist Therefore the target value was met and this particular customer want was fulfilled More fundamen
25. Wrapping Test System for CNH Round Balers Phase 4 Final Report December 11 2011 Allan Arisi Kyle Doolin Jeffrey Hawk Ryan Klusty Table of Contents Problem Statement and Project SCOPC ssssscccssssscccssssccecssssscecessseccecssssceenssseceeessseceanssseseacssssseansess 3 Overview of Final Prototype s i cccccscsccedtss ciccetcsacdscedesececconacedessnstccescnacdstedeascdebenscccdsonsecdebnacestedarecdsaonnes 4 Metric Test Plant viciiesssssssccsassesencecssscgesssodeseusssecdessguinseesssecdesspedesensssseddnapesennescsecdscenwsesenssdsccesesudeneesesene 10 Prototype Weight aee etre ev ete es teles adv ee aE n ia 10 Number of Permanent Connections to Baler esesssseseseeeeeeeeenee enne 12 Speed of Prototype Roller t i ttt tea e te i edes ea Ve b ena E e ek ad n 13 Size of Designs E nehmen teh HIM 16 Timie Between Trials re e e e br RE via RC Da e RR CE vas e Ren een EY TR Y eee ov ee EE Reds 17 Starting Exposed NetLength ier rne IEEE 19 Pullibig FOELCe 2 8 et t eher e ee hte Rt e RE 22 Number of Pinch Points Exposed to Operator sese ener nnne nera nnns nn nan 25 COSCOPPFOLOLtVDO s on Tr dot ere teen niteat etate tee vetu edv a etd x ECT 27 Metric Test Results cisions roria orase 29 Prototype Welght bs EE E e ee AE IE E EA OE 29 Number of Permanent Connections to Baler cceecceeesceceseeeeeeeeeaceceeeeeceaeee
26. al Approved By Date es TE Material PURCHASED PART Quantity 3 TO BE MODIFIED Angular Scale 1 5 DWGNO 84560725 t 0 5 Deg Billing Account 78 Sog 0 25 N All Dimensions in inches Tolerances Project or Class MEEG 401 Senior Design Unless Otherwise Sponsored By CNH America LLC Noted Detail Drawing Title 4567089 Tray Support Rod XXX 005 Sheet EXE X 050 DrawnBy CNH Design Team Date 12 10 11 Angular Scale 1 10 DWG NO 84567089 0 5De d Billing Account 79 All Dimensions in inches Tolerances Project or Class AAEEG 401 Senior Design Unless Otherwi se Sponsored By CNH America LLC Noted Decimal Drawing Title XXX 005 84560717 Outer Clamp Piece XX 010 l l X 059 Prawn By CNH Design Team Date 1081 11 Fractional Approved Py 1 32 Material CD Flat ASTM A108 1016 Quantity 2 m Dwa No 8456071 Billing Account 80 81
27. ation provided above the data table can be extended to include pulling force Table 10 provides the space for the calculated data 23 Table 12 Data table with space provided to include pulling capabilities of the design at different cylinder pressures presente Calculated Calculated Trial Normal Force Pulling Force pa Ib Ib 1 30 282 7 2 40 377 0 3 50 471 2 4 60 565 5 5 70 659 7 6 80 754 0 7 90 848 2 8 100 942 5 9 120 1131 0 This analysis should provide the minimum applied normal force and cylinder pressure required to pull the netting while under tension Risk and Contingencies Due to the high forces being applied during this testing there are safety precautions that the operator should adhere to Safety goggles should be worn and no loose clothing or jewelry should be exposed while the test is underway Once the PTO is initiated and the test has begun a safe distance should be kept The pneumatic regulator is in a position such that the operator has no need to enter the bale chamber If there is a problem during the testing the tractor and PTO should be immediately shutoff Failure Analysis In the event that the netting is not successfully pulled from the baler at any of the tested cylinder pressures then a redesign must be considered by the team in order to meet the sponsor s need of 150 pounds of pulling force Resources Equipment required for the test includes
28. concentration on the pushing block Revision 46 Increasing the height of the pushing block will enable the pneumatic cylinder rubber stoppers to consistently maintain contact with the pushing block and will prevent the rubber stoppers from folding or slipping Tire Setup Concern The prototype currently consists of six 8 9 diameter pneumatic tires that have a zigzag tire tread pattern These tires are evenly spaced and create the contact area between the baler roller and the prototype The tread of the tire limits the surface contact area and permits gaps rather than creating an area of complete contact This decrease in surface area enables the possibility of creating a stress concentration where the pneumatic tires tear the netting instead of pulling the netting The tires also contain hair like features on its surface from the molding process Revision The area of contact between the pneumatic tires and the baler roller can be increased with the addition of two more tires The prototype has been designed to allow for two additional tires and will allow the pressure from the pneumatic system to be translated through eight tires rather than six tires The tread of the tire should be lathed off in order to create a flat uniform surface on the tire as well as discard of the hair like features Tray Concern The current tray width does not extend from one side of the baling chamber wall to the other The gap between the edges of the
29. d the following equipment All components of the design Scale to measure weight 12 Customer Want Detachable from Baler Metric Number of Permanent Connections to Baler Target Value 0 Permanent Connections Objective The objective of this test is to determine if the designed prototype is completely detachable from the baler The following test plan will be carried out to determine if the prototype meets the sponsor requirement that the design should be detachable from the baler The test will involve a count of fixed connections between the baler and the prototype Procedure e Onthe prototype mark the connection points to the baler say 1 10 e Onthe count sheet describe the connections as either of the following o Fixed Permanently attaches to baler e g weld o Notfixed can be detached from baler e Record the total number of fixed connections and not fixed connections in the table below Table 6 Connection Fixed or Not Fixed Axle Connection 1 Not Fixed Attached by U Bolt Axle Connection 2 Not Fixed Attached by U Bolt Baler Frame Connection 1 Not Fixed Attached by C Clamp Baler Frame Connection 2 Not Fixed Attached by C Clamp Analysis If fixed connections is gt 1 the prototype is not detachable Otherwise the prototype is detachable and meets the detachability requirement outlined in the sponsor needs and wants Phase II 13 Customer Want Speed of Design matched PTO Speed
30. e Rubber Bumper 2 84560704 Risener LOU FAAUMA 3 84560728 Pneumatic Regulator 1 Cylinder 84560705 Inner Clamp Piece 84560729 Repularor MSUnHhe Bracket 84560706 Pneumatic cyinger 84567076 Air Hose Support Sheet 84560708 Inner Telescoping Tube 84567077 Air Toggle Valve 84560709 U Bolt 2 84567078 3 Way Air Splitter 84560710 L Bracket Tray Support 84567079 1 4 Coupler Plug 4 oa T N eson te s saser subasembys 1 e With all parts of the design obtained assembly of the prototype was completed The following is a detailed description of the final prototype assembly split into sub assemblies Sub Assembly 1 Part No 84560724 1 Attach Weld Assembly 1 84560723 between Weld Assembly 2 84567082 and Weld Assembly 3 84567081 using bolts This is done by connecting the Vertical Attachment part of Weld Assembly 1 to the corresponding holes in the gusset plate weld assemblies 2 Connect Weld Assembly 4 84567083 between Weld Assembly 2 and Weld Assembly 3 using 7 bolts This step is completed by connecting the Main Support Bar to the locating holes in Weld Assembly 2 and 3 3 Attach L Bracket Tray Support 84560710 to the corresponding holes on the Horizontal Bar using 74 bolts Do this one on each side of Horizontal Bar Sub Assembly 2 Part No 84567080 1 Slide Shaft 84560711 into the center Inner Telescoping Tube 84560708 being sure not to thread the shaft through the other two Inner
31. e given constraint of 5000 provided by CNH Description of Test Rationale This will verify that the cost of the mechanism is less than 5000 thus showing the mechanism is acceptable to CNH Procedures Create a list of all materials and quantity used in the mechanism as well as their purchase costs manufacturing costs and if applicable fabrication and capital costs Then total up the final costs and compare to the 5000 limit Data Collection Table 14 Part CNH Part D ipti Pri N No escription Qty rice ea otes No Cost Total Cost 27 Data Analysis Compare to the 5000 limit If the total cost is less the design team has successfully designed the mechanism for the cost metric Resources Resources needed are a master parts list quantity of each part and a calculator or access to Excel 28 Metric Test Results The following section outlines the results from the validation testing performed by the team Customer Want Can be operated by one technician Metric Weight Target Value 100lb Overview of Test This test was performed to determine the total weight of the assembled design to verify if the weight constraint was met Results Table 15 Trial Part Weight 1 Weight 2 Weight 3 Weight 4 Weight 5 Mean 1 Wela Assembly da te 1 17 4 Ibs 17 4 Ibs 17 4 Ibs
32. e lower part of the baler frame Metric Width and Height Target Value Width 48inches Height 50inches Overview of Test This test was performed to verify that the device fits within the lower part of the baler frame This customer want was quantified with a metric of width and height of the design Measurements were made with a tape measure and at various points across the prototype Results Table 18 Sample Width inches Height inches 1 45 5 56 5 2 45 4 56 0 3 45 5 56 3 4 45 4 56 2 5 45 5 56 4 Average 45 6 56 3 Standard Deviation 0 055 0 19 From the above results it can be seen that the width constraint is met with 99 9 confidence This can be seen because the mean width 45 6in plus 3 standard deviations 0 055in is still less than the constraint of 48 inches Conclusion The team validated and passed the height and width requirements for the baler provided to the design team by the sponsor but other minor adjustments must be made to fit the prototype into the lower portion of most balers at the CNH facility The height requirement was not imposed by the sponsor until after the design was completed and submitted for fabrication The balers at the CNH facility have a back hatch and belts that would be cause for concern Our prototype would have to be lowered to 50 inches to fit under the belts which could be done by cutting off a portion of the main support bars and drilling two
33. eaaeeeeaeeseeeecsaeeeeaaeeseaeeesaes 31 Speed of Prototype Roller 7 ete t tte t a ee BER Ea Sede bate est UE Hang 32 Size ot Desighia n tei merce te ei estesa tete hs eae ch hs eerte tuere enh be 35 Time Between Trials rr ERR cae ce EE COPI t gs 36 Starting Exposed Net LEngth cccccccccccssssssscecececsssessseseeeescesseseeaeeeceescesseeeaeeesecsseeseaaeaeeeeseeseeaaeaeeeeeens 37 P llitigsFOICe s tete iet eet ette tet e ett me vtt s a ett devo deditus tee ata ee 39 Number of Pinch Points Exposed to Operator c ccccccccccsssssssecececessssesnaecececeseesecnsaeeeesesseesesneaeeeeeeeseesegs 41 COSt Of PFOtOtyDesi eere bb bmp eese iiM 42 Failure Modes Effects Analysis 1 11 1 etie et eoe ee ea ee nnno a oen opa co ann pats na no et ee pano na oy akon a aaa sena So cuan 43 Path Forward and Transition to Sponsor eee eese eee eese eee eene ena nonne na stesse sa soto sea soto sena soto sonans 46 BEINNUERDUE E E H A EES 49 Projected Viability ossis 50 P IIDDe C M 51 Problem Statement and Project Scope Current methods for pulling the netting during New Holland round baler net wrapping tests are inefficient time consuming and depend on availability of crop Currently CNH has two methods for performing these tests 1 The first method can be performed inside of the CNH facility and involves pulling the netting out of the baler by hand wrap
34. ental Plan Measured or Response Variable Time it takes between each trial Variables to Change Pressure that is being applied Variables to Held Constant Steps to force netting through along with length in which duck bill is inserted Procedures to Prepare Test Samples or Materials Assemble the prototype with all of the required parts Move prototype into the vicinity of the baler set it on the axle and rotate it into the bale chamber until the clamps fit snug against the outer wall casing of the baler Begin to clamp one side to the baler frame with two large bolts and outer clamp piece Then bolt both feet to the axel with the U bolts Clamp the other remaining side to the outer wall casing After these steps are taken you may proceed to test once the tractor and PTO are set up correctly Data Collection Plan In a listing format record the time it takes between running each trial on paper Table 9 Sample Time Between Trials seconds 4 5 Average Standard Deviation 17 Data Analysis Methods Determine whether or not the measurements found lie within the given target This target was set to have a two minute max between each trial After a considerable amount of trials the verdict of whether the target will be met will be clear It also depends on if the person running the equipment is familiar with the tractor PTO baler and prototype Risks and Contingencies The risks are cut d
35. er of Exposed Pinch Points to Operator Target Value 0 Exposed Pinch Points Overview of Test The objective of this test was to verify that the design is safe for the operator to use This was quantified by creating a metric of number of pinch points exposed to the operator It was decided that a safe design would have no pinch points that the operator could hurt themselves in Since pinching action is a key component to the design pinch points could not be completely omitted from the design Instead protocols were created which the technician must adhere to when using the machine As stated by the operator s manual the technician should keep all limbs and parts of body out of the bale chamber during operation of the device Since the user must remain outside of the baler during operation of the device it was determined that an exposed pinch point is defined as one that is less than 12inches from edge of the baler The following table shows the distance from the edge of the bale chamber to the pinch point Results Table 23 Pinch Point within Design Distance from Edge of Baler in Pinch Point Exposed to User Pneumatic Cylinder 1 17 2 No Pneumatic Cylinder 2 17 2 No Pneumatic Cylinder 3 17 2 No Baler Roller and Tire 1 23 8 No Baler Roller and Tire 2 23 8 No Baler Roller and Tire 3 23 8 No Baler Roller and Tire 4 23 8 No Baler Roller and Tire 5 23 8 No Baler Roller and Tire 6 23 8 No Conclusion
36. et is reinserted into the baling chamber these tests will continue to vary the net length until a minimum starting length is determined Once the team has found the smallest amount of starting net length that the design can pull it can be decided whether or not the design meets the sponsor s constraint Experimental Plan Variables to be measured Whether or not the prototype can begin pulling the netting Variables to be changed The starting exposed length of netting within the bale chamber Variables to be held constant Pressure of tires angle of applied force PTO Speed exerted force Procedures to Prepare Test Samples Before performing the test the person initiating the testing should adhere to the following procedure Assemble the prototype and transfer to testing site Properly install the pulling mechanism into the baling chamber Secure the prototype to baler by a Clamp one side of the prototype to the frame of the baler b Secure to baler axle using U bolts c Clamp remaining side to baler frame 4 Connect pneumatic system to prototype by attaching hoses to the pneumatic cylinders leading to regulator valve and air supply Refer to schematic of the pneumatic system for detailed setup instructions 5 Attach baler to tractor via PTO drive shaft 19 Data Collection Plan The following procedure will be followed to determine the minimum starting net length required 1 Prior to starting the tractor and PTO actuate duc
37. etermine if these locations are dangerous to the user during operation Table 13 Pinch Point within Design Distance from Edge of Baler in Pinch Point Exposed to User Pneumatic Cylinder 1 Pneumatic Cylinder 2 Pneumatic Cylinder 3 Baler Roller and Tire 1 Baler Roller and Tire 2 Baler Roller and Tire 3 Baler Roller and Tire 4 Baler Roller and Tire 5 Baler Roller and Tire 6 Analysis If the pinch points are more than 12 inches from the edge of the baler then the pinch points are defined as not exposed to operator This can be said because the operator should not enter the bale chamber during operation of the device and 12 inches is a sufficient minimum distance to provide safety 25 Risk and Contingencies Injury or risk of injury can be avoided by educating the operator on the setup and automation of the mechanism The user must know assembly procedures and automation procedures The user must also be aware of possible swaying and that operation must be halted in order to gain access to the baling chamber Resources Resources required are a CNH round baler a tractor to provide power via its PTO and the net pulling mechanism designed by the University of Delaware design team 26 Customer Want Cost Efficient Design Metric Cost of Prototype Constrain 5000 Objective of the Test The objective of this test is to confirm that the mechanism costs less than th
38. ey are put on to secure the structure once it is already inside the baler Table 16 Trial Part Weight 1 Weight 2 Weight 3 Weight 4 Weight 5 Mean 1 Outer Clamp Piece a 5 0 Ibs 5 0 Ibs 5 0 Ibs 5 0 Ibs 5 0 Ibs 5 0 Ibs 2 Outer Clamp Piece b 5 0 Ibs 5 0 Ibs 5 0 Ibs 5 0 Ibs 5 0 Ibs 5 0 Ibs geen Dalene 2 0 Ibs 2 0 Ibs 2 0 Ibs 2 0 Ibs 2 0 Ibs 2 0 lbs Hardware Total 12 0 Ibs Conclusion Unfortunately the team s prototype shows to be overweight after the data was complied Fortunately the prototype is not extremely over the weight limit so small things can be implemented to fall under the weight constraint The tray along with the struts and L bracket that holds the tray could be made out of aluminum instead of steel The heavy foot piece that is welded to the main support bar can be machined so that it less thick and is not as wide Another option would be to take out the middle inner outer telescoping tubes along with the gusset plates weld assemblies and pneumatic cylinder bracket that are involved with this structure If you take this route two or more tires should be added onto the shaft to prevent bending Doing this would take a considerable amount of weight off of the prototype As of now two people have to lift the assembled prototype onto the axel of the baler Once the prototype is rotated into the baler only one operator has to take over to clamp the sides to the baler frame
39. ge 191 9 0 84 Standard Dev 2 2 0 01 Sample Engine Speed rpm Average Angular Velocity Ratio 1 750 0 83 2 1000 0 85 3 1500 0 84 4 2100 0 85 5 2400 0 84 33 Total Mean of Average Angular Velocity Ratios 0 84 Standard deviation of the data 0 010 For 95 confidence 20 0 020 Measured speed ratio 0 84 0 020 with 95 Cl The measured roller ratio was seen to be 0 83 0 05 This was determined by measuring the circumference of the baler roller and the distance the on the roller a tire traveled during one tire rotation The distance traveled by the tire was then divided by the circumference of the roller to obtain the ratio This ratio was measured while the tire was under load to account for the deflection of the tire This allowable range of 0 83 0 05 was met by the design with 95 confidence since the measured speed ratio using the tachometer was found to be 0 84 0 02 with a 95 confidence interval Calculation of Reliability True Deviation i Measured Deviation Ses 2 EIS 0 ili 23 0 96 96 Reliability Conclusion The roller to tire ratio can be used to find the tangential velocities of the tire and the roller Since the ratios match it can be determined that the prototype tire tangential velocity match the baler roller tangential velocity at every operational speed with 9596 confidence Validation test passed and customer constraint met 34 Customer Want Fits within th
40. gular Scale 1 20 DWG NO 845607 16 0 5Deg an Billing Account 74 0 030 26 75 All Dimensions in inches Tolerances Project or Class IMEEG 401 Senior Design Unless Otherwise Sponsored By CNH America LLC Noted Decimal pe oses JIS Drawing Title 84560715 Tray Connector Piece x im Fraaional CSTYPEB Anglar Sale no 7 DWGNO 84560715 Billing Account 75 All Dimensions in inches Tolerances Project or Class MEEG 401 Senior Design U nless Otherwise Sponsored By CNH America LLC Noted Drawing Title Decimal 84560720 PUSHING BLOCK XXX 005 BLOCK Ses es oli n X 050 Drawn By CNH Design Team Date 10 31 11 c pem 00000 T BESSER ISTE 0 35 De E Biling Account All Dimensions in inches Tolerances Projector Class MEEG 401 Senior Design Unless Ree Sponsored By CNH America LLC Note ing Title Decimal Drawing Title XXX 005 xXx 010 z X 050 Drawn By CNH Design Team Date 10 31 11 ial CD ROUND STOCK ity Angular Scale 1 10 DWG NO 84560711 t 0 5 Deg m Billing Account 84560711 Shaft 77 4 x 0 105 All Dimensions in inches Tolerances Project or Class MEEG 401 Senior Design Unless Otherwise Sponsored By CNH America LLC Noted Drawing Title Decimal 84560725 OUTER TELESCOP ING TUBE XXX 005 TUBE XX 010 X os Draw By CNH DesignTeam Date 10 31 11 Fraction
41. he pneumatic cylinders and open the valve to let air through The operator would regulate how much pressure is needed Once the operator is satisfied with all the connections and pressure being applied to the tires he she can begin testing Projected Viability There is no true commercial viability to this design because it is not intended to be a commercial project However it is a viable design as a lab stand overall The mechanism did not meet all constraints and was not able to ultimately complete a full automatic bale cycle but it was close The design showed that pneumatic cylinders were a viable way to apply pressure to a fixed shaft with moving tires The pneumatic tires were observed to be an excellent solution to the ribbed roller vibrations induced within the system Many expected problems actually turned out to be non issues An original concern was that the axle would tend to sway while tests were being run and the device might bump into the walls of the baler It was actually observed to be a very rigid mechanism which became very solid under testing conditions The tires performed better than expected grabbing tail net lengths as low as 2 inches The U bolt system also proved to be a good way to secure the device to the baler axle Overall this concept was a viable solution to the problem provided by the sponsor Solutions to the concerns seen within the transition plan found earlier in this report will only make the design perform
42. into the bale chamber 22 2 Manually pull extra netting out of duck bill into bale chamber to ensure tire is in complete contact with the netting once pressure is applied 3 Open valve within the pneumatic system to apply the initial test pressure to the main ribbed baler roller Turn on tractor and set PTO speed maximum speed to run the baler and begin test Record pressure and whether or not it successfully pulls the netting Vary pressure in accordance to table 9 and record results Now fF Once all pressures are tested shutoff tractor and PTO and testing is complete Table 11 Data table for test Normal force calculated using F 3 cylinders P A where A pi r 2 r 1in presence Calculated Netting Trial Normal Force Pulled del Ib Yes No 1 30 282 7 2 40 377 0 3 50 471 2 4 60 565 5 5 70 659 7 6 80 754 0 7 90 848 2 8 100 942 5 9 120 1131 0 Data Analysis Methods Using the lowest pressure needed to successfully pull the netting determined using data collected perform the following analysis to find the pulling force of the prototype u 0 29 calculated during friction testing Fpulling UX Frormal From the friction testing it was calculated that a normal force of 517lb was required to successfully pull the netting from the baler The test performed here should show how close this calculation was to the actual pulling capabilities of the prototype Using the equ
43. ired for these two metrics as they are accounted for through the validation of the primary sponsor want that the net be pulled successfully from the baler Overview of Final Prototype After successfully completing the drawing package all completed drawings were delivered to the sponsor for fabrication Additionally all required purchased parts were tabulated and passed onto the sponsor to place the orders The purchased parts were delivered and the team was able to inspect and order any parts that were seen to be missing while waiting on the fabrication of machined parts CNH made a majority of the parts in their development facility for the team Once all parts were fabricated the ones which were part of a weld assembly were moved into a new work order for completion The weld assemblies were the last to be completed Once finished the team was able to pick up all fabricated parts from the CNH technical center Table 1 provides a complete bill of materials The completed drawing package can be found in the appendix Table 3 A complete bill of materials for the finalized design CNH Part 84560698 Main Support Bar CNH Part 84560721 Vertical Attachment Spacer 6 84560722 Main Bar Spacer 6 84560699 Pneumatic Cylinder 84560700 Vertical Attachment mss Gusset Plate 6 Vertical to Horizontal 84560702 6 84560726 Threaded Rubber Bumper 3 Bar Connector Sheet 84560703 Horizontal Bar 1 84560727 Adhesiv
44. kbill and pull out netting by hand cutting the net to the desired starting length as per Table 8 Once this length has been set retract the duckbill from the baling chamber Apply pressure to pneumatic cylinders forcing tires onto baler rollers Turn on tractor and begin to run the PTO at maximum speed Reinsert the duckbill into the baling chamber to allow the netting to lay over the baler roller Record whether or not the netting is successfully pulled from baler SD or oq poo Repeat steps 1 6 until all starting net lengths are measured and a minimal starting length is determined Table 10 Data table for test of minimum initial starting net length Net Pulled Yes Y Yes Y Yes Y Yes Y Yes Y Yes Y No N No N No N No N No N No N Starting Net Tries Length in Data Analysis Methods From the test it should be clear what the design is capable of in terms of how little netting is needed to be exposed for a successful bale cycle simulation With the value for this starting length the team can determine whether or not the design meets the sponsor s want Risks and Contingencies Due to the high forces being applied during this testing there are safety precautions that the operator should adhere to Safety goggles should be worn and no loose clothing or jewelry should be exposed while the test is underway Once the PTO is initiated and the tes
45. mber to determine if the rubber belts interfere with the prototype s functionality or installation process If the rubber belts do not interfere with the prototype s functionality or installation process the height does not need to be adjusted If the rubber belts do have an effect on the prototype s functionality or installation process the length of Part Number 84560698 Main Support bar is required to be reduced to the height that is necessary to create a clearance between the rubber belts and the prototype Clamping System Concern The clamps are designed for the round baler presented to the design team for testing As the clamps were bolted to induce the necessary clamping force it was observed the clamps lost contact with the baler wall and began to pivot round the baler wall s edge This prevented the prototype from securing to the baler frame Revision C clamps should be implemented to secure the prototype to the round baler frame Installing c clamps will ensure the prototype will not fail under the forces created through the pneumatic system C clamps also allow for quicker and simpler installation and detachment process Pushing Block Concern The pushing block lacks the essential height required to allow pneumatic cylinder rubber stoppers to maintain complete contact with the pushing block This causes the rubber stoppers to fold over the top of the pushing block creating the possibility of slipping or creating a stress
46. measure each component of the assembly when disassembled and then add the individual component weights to obtain the weight of the entire prototype Experimental Plan Variables to be measured Weight of individual prototype components Variables to be changed Part being measured Variables to be held constant Scale being used initial weight reading on scale should be zero Procedures to Prepare Test Samples Before performing the test and measuring the weights of the prototype components the person initiating the testing should follow the following procedure 1 Take note of the part being measured to ensure it is not measured more than once 2 Besure no excess pieces or debris are being measured with the part Data Collection Plan The test will be completed as follows 1 Obtain individual part to be weighed 10 Zero the scale which will weigh the part Measure the weight of the part Record measurement Repeat steps 2 4 five times for each component Repeat steps 1 5 until all parts have been weighed DEO Ur S a a Add individual weights to obtain total weight of the prototype Table 4 Trial Part Weight 1 Weight 2 Weight 3 Weight 4 Weight 5 Mean Weld Assembly 1a Leg 1 and Hardware Weld Assembly 1b Leg 2 and Hardware Shaft Tire 1 Tire 2 Tire 3 Tire 4 Tire 5 oOolowolnNn ani wm AJo Tire 6 18 Shaft Collars 11 Inner Telescoping Tube a wi
47. n inches Tolerances Project or Class MEEG 401 Senior Design Unless Otherwise Sponsored By CNH America LLC Noted 2 Drawing Title xxx o05 84560706 Pneumatic Cylinder Support Sheet XX 010 X 959 Drawn By CNH DesignTeam pate 10 31 11 E Fg DW NO BASEOTOG 0 5 Deg Billing Account 71 4 X 0 083 2 x 0 531 All Dimensions in inches Tolerances Project or Class MEEG 401 Senior Design Unless Pic dai Sponsored By CNH America LLC Note Decimal Drawing Title 84560700 Vertical Bar Attachment KEREN XX 010 X 050 Drawn By CNH Design Team Date 10 21 11 1 32 Material A500 Quantity 3 rade deC Angular Scale 1 2 DWG NO 84560700 0 5 De Billing Account 72 All Dimensions in inches Tolerances Project or Class MEEG 401 Senior Design Unless Otherwise Sponsored By CNH America LLC Noted eee Drawing Title 84560702 Vertical to Horizontal EXEC EROS Bar Connector Sheet xx 010 Xx os Pe By CNH DesignTeam Date 10 31 11 Fractional Approved By Date fie ELLE Angular Scale 1 1 DWG NO 84560702 t 0 5 Deg m 73 All Dimensions in inches Tolerances Project or Class MEEG 401 Senior Design Unless Otherwise Sponsored By CNH America LLC Noted Drawing Title Decimal 84560716 Tray XXX 005 XX 010 X xo Pw BY CNHDesignTeam Date 10 31 11 Fractional pe eee wii CS TYPE B An
48. new inch holes in each of them The angle of the arms can be adjusted with the gusset plate within the design and therefore can be changed to fit a variety of different sized balers 35 Customer Want Minimal time between trials Metric Time between trials set up time Target Value 2 minutes Overview of Test This test was designed to test the metric of time between trials The team had designed the device with the thought that in between wrap cycles the user may need to remove the mechanism from the baler It was determined that 2 minutes was the target value for this time in between trials The test was run using a stop watch to measure how long two people could install the device within the baler The prototype was not removed from the axle as it is unnecessary to do so in order to set up the next trial Results Table 19 Sample Time in Between Trials seconds 1 45 52 2 26 11 3 35 20 4 24 41 5 27 67 Average 31 78 Standard Deviation 7 8 Now to allow for 95 confidence we will multiply the standard deviation by 2 20 2 7 8 15 6 The answer found above can now be used to determine if the metric time in between trials falls under two minutes and meets our target value Mean 15 6 31 78 15 6 31 78 15 6 47 38 seconds 31 78 15 6 16 18 seconds Conclusion Both of these answers clearly show that they fall well with under the two minute target value and even are unde
49. own since the prototype is automated and the person running the equipment does not have to pull the netting at all in between cycles Still the operator should be aware of the dangers that are present Resources DAQ Hardware Instruments Tractor round baler and PTO drive Test Equipment and Hardware Prototype pencil and paper People Facilitators of the test 18 Customer Want Uses minimal net length at startup Metric Initial starting Exposed Net Length Target Value 1 inch Objective of Testing The purpose of this test is to determine the smallest amount of exposed netting that the mechanism can initially pinch and pull at the startup of a simulated net wrapping cycle During an actual bale cycle once the net wrap cycle is initiated the duckbill enters the bale chamber and exposed netting to the hay An exposed net length of 1 inch is typically all the bale of crop needs to pinch and begin wrapping itself Because the duckbill typically exposes 1 inch of netting this is the target value for the length of netting the design is capable of pinching Description of Test Rationale and Procedures This test will be performed within a CNH provided round baler The team will measure lengths of exposed netting and vary these lengths between trials The netting will then be retracted out of the baling chamber the pulling mechanism will be properly installed and the baling chamber will be powered via the PTO of a tractor Once the n
50. ping the net around the lower roller within baler and securing it with tape The operator then runs baler and the roller which is securing the netting wraps up the netting pulling it from the baler Once testing is completed the operator must unwrap the netting from the roller and dispose of the netting 2 Analternative current method simply involves attaching a baler to a tractor and taking it into the field Once in the field an actual bale of hay is made and crop is used to test the wrapping system CNH has tasked the University of Delaware Mechanical Engineering design team with the task of designing and testing an effective and feasible prototype which will act as an alternative to the two currently used methods of testing net wrapping performance The mechanism must operate within a New Holland round baler chamber and will successfully pull netting from the baler The design will be used as a lab stand for future round baler net wrapper functionality development Project requirements There were no updates for the prototype requirements during phase IV of the design process Refer to phase III for a table of the final prototype requirements For reference the table has been reprinted below Table 1 Ranked sponsor wants and corresponding metrics Ranked Sponsor Wants Metrics Description Metric Range Target Value Successfully pulls netting from baler Pulling force 100 150 Ib 150 b Speed is adjustable to match PTO speed Speed of
51. r one minute The test is validated and passes Validation test passed and customer constraint met 36 Customer Want Uses minimal net length at startup Metric Initial Starting exposed net length Target Value 1 inch Overview of Test In a true testing environment this design would be used by having it in the baler and inserting the duckbill to provide the system with netting The netting would be grabbed while under zero tension and the duckbill would then retract applying tension to the netting When the simulated bale cycle was complete the duckbill would retract further initiating the cutting cycle and the net would be cut This particular test was performed to test the first step of the bale wrap cycle explained above the initial grabbing of netting The test helped to determine the minimum length of initially exposed netting which could successfully be pulled from the baler by the design Data Collection Below is a data table containing the results of the minimum starting net length test Table 20 Net Pulled Yes Y Yes Y Yes Y Yes Y Yes Y Yes Y No N No N No N No N No N No N Y Y Y Y Y Starting Net Trial Length in m e eo lt o o p Ui BR WI NI rR eINIWI BRIO OA NI o Zz Zz lt lt lt lt lt lt Z lt lt lt lt lt lt lt Z 2 lt lt lt lt lt lt Z lt lt lt lt lt
52. rative Parts Number Cost 50 part 18 Part s 900 00 Total Weight of Steel Products 0 50 Ib 105 6 Ibs 52 80 Welding Hour Cost 78 81 hr 8 hours welding 630 48 Machining Hours Cost 78 81 hr 8 hours machining 630 48 Total Cost 3 024 06 Data Analysis The total cost of the prototype comes to be 3 024 06 and does not meet the target value of 3 000 by a mere 24 06 Though the cost constraint for the prototype is 5 000 and the prototype cost is well under this cost constraint Based upon this constraint value it can be confirmed the prototype successfully falls within the budget allocated to the design team and design team has fulfilled the cost effective metric Validation test passed and customer constraint met 43 Failure Modes Effects Analysis FMEA From the FMEA analysis it was found that the greatest risk of associated with the prototype was the tire leak This is due to the fact that tire leaks are difficult to detect and has a great detrimental effect on performance of the prototype The lowest risk associated with the prototype was breaking of the axle and leaking of the hoses due to excessive exposure to UV light In as much as breaking of the axle is catastrophic it is easily detected since the axle has to bend before breaking The leak of the hoses due to UV light exposure is also unlikely since the prototype will be mainly used in shaded environment away from UV light
53. s then divided by the tire speed to obtain a ratio which will be used to verify if the tangential velocities are equal Engine Speed 750rpm Baler Roller Speed 47 9rpm Tire Tire Speed rom Angular Velocity Ratio 1 57 6 0 83 2 58 8 0 81 3 57 3 0 84 4 57 5 0 83 5 56 2 0 85 6 57 8 0 83 Average 57 5 0 83 Standard Dev 0 8 0 01 Engine Speed 1000rpm Baler Roller Speed 66 2rpm Tire Tire Speed rpm Angular Velocity Ratio 1 77 8 0 85 2 77 5 0 85 3 77 8 0 85 4 78 2 0 85 5 79 0 0 84 6 78 1 0 85 Average 78 1 0 85 Standard Dev 0 5 0 01 32 Engine Speed 1500rpm Baler Roller Speed 98 4rpm Tire Tire Speed rpm Angular Velocity Ratio 1 116 7 0 84 2 118 4 0 83 3 116 4 0 85 4 116 4 0 85 5 115 6 0 85 6 116 5 0 84 Average 116 7 0 84 Standard Dev 0 8 0 01 Engine Speed 2100rpm Baler Roller Speed 132 8rpm Tire Tire Speed rpm Angular Velocity Ratio 1 158 8 0 84 2 156 6 0 85 3 156 7 0 85 4 157 7 0 84 5 154 3 0 86 6 158 2 0 84 Average 157 1 0 85 Standard Dev 1 5 0 01 Engine Speed 2400rpm Baler Roller Speed 160 6rpm Tire Tire Speed rpm Angular Velocity Ratio 1 191 7 0 84 2 188 4 0 85 3 191 6 0 84 4 191 6 0 84 5 195 9 0 82 6 191 9 0 84 Avera
54. satisfy the sponsor s fundamental want The team will perform an indirect measurement of the pulling force The pulling force of the prototype will be determined by first measuring the amount of normal force the design can apply to the baler roller Then using these results and the coefficient of friction determined in the design phase of the project the pulling force of the system can be calculated Experimental Plan Variables to be measured Normal force exerted by prototype Variables to be changed Pressure applied to the pneumatic cylinders Variables to be held constant Pressure of tires angle of applied force PTO Speed Procedures to Prepare Test Samples Before performing the test and measuring the normal force of the prototype the person initiating the testing should adhere to the following procedure 6 Assemble the prototype and transfer to testing site 7 Secure the prototype to baler by a Clamp one side of the prototype to the frame of the baler b Secure to baler axle using U bolts c Clamp remaining side to baler frame 8 Connect pneumatic system to prototype by attaching hoses to the pneumatic cylinders leading to regulator valve and air supply Refer to schematic of the pneumatic system for detailed setup instructions 9 Attach baler to tractor via PTO drive shaft Data Collection Plan The following procedure will be followed to measure the pulling force of the design 1 Actuate duck bill to insert netting
55. t has begun a safe distance should be kept The pneumatic regulator is in a position such that the operator has no need to enter the bale chamber If there is a problem during the testing the tractor and PTO should be immediately shut off Failure Analysis 20 In the event that the starting net length required is too large the duckbill has a maximum amount of length that can be inserted into the baler then the team must perform a redesign and suggest a way to accomplish the sponsor constraint of minimal starting exposed net length Resources Equipment required for the test includes Tractor with PTO hookup Baler with PTO driveshaft Pneumatic air supply Assembled prototype Spool of netting within baler The facilitators of this test are the four members of the CNH design team 21 Customer Want Successfully Pulls Netting from Baler Metric Pulling Force Target Value 150lb Objective of Testing The objective of this test is to validate the key aspect of the design its pulling force The purpose of this prototype is to pull netting from a CNH baler This test will show if the design can successfully serve its purpose The overall objective of the test is to measure the pulling force of the prototype and determining whether the design meets the sponsor s want Description of Test Rationale and Procedures The metric of pulling force was assigned as the most significant aspect of the design and must be met to
56. tally this design is easily taken in and out of the round baler leaving the baler unchanged The sponsor desired a device which could be used in a baler without modifying the baler in anyway and allowing removal of the mechanism This desire was met with the completed design Validation test passed and customer constraint met 31 Customer Want Speed of Design Matches PTO Speed Metric Speed of Prototype Roller Target Value Equal to the Baler Roller Speed Overview of Test This validation test was performed to determine if the design meets the customer want of matching the speed of the baler The sponsor wanted to be sure that the device would be moving at the same speed as the baler to ensure proper removal of netting If the team had chosen to use an external power source this constraint may have proven to be a difficult one to achieve However the selected design utilizes the baler roller as a power source and therefore should move at the same speed Although it appeared to be an easy constraint to meet the test was run to verify that the prototype does indeed move at the same speed as the roller If the design passed the test it could be said with certainty that the netting will be pulled at the correct speeds Results The following tables outline the results from the five samples taken during the test Each sample was done at a different PTO speed The roller and tire speeds were measured using a tachometer The roller speed wa
57. th Pushing Block a and Hardware 12 Inner Telescoping Tube b with Pushing Block b and Hardware 13 Inner Telescoping Tube c with Pushing Block c and Hardware 14 Tray along with Struts and Hardware 15 Assembled Horizontal Bar with Tray L Brackets a and b Gusset Plates Weld Assemblies 2 6 Pneumatic Cylinders a b and c Cylinder Brackets a b and c and Hardware Total 11 Parts that were weighed but not added to the total system since they are put on to secure the structure once it is already inside the baler Table 5 Trial Part Weight 1 Weight 2 Weight 3 Weight 4 Weight 5 Mean 1 Outer Clamp Piece a 2 Outer Clamp Piece b Both U bolts with 3 Hardware Total Data Analysis Methods The total weight of the prototype will be determined by calculating the summation of the mean weights of each part The formula for this calculation is as follows 43 gt mean of trial i 1 1 With this total weight it can be determined if the target value was met Risks and Contingencies There are no major risks or contingencies for this test The test is simple and should only require the parts and a simple scale Failure Analysis If the test fails then the prototype is overweight and the design team must provide a solution to put the design within the sponsor s constraints Resources For this test the team will nee
58. the device is being transported Now begin to secure the collars starting with the outsides of the inner tubing Every other collar is tightened by certain judgment of uniformity between the tires Leave minimal space between the collars and the tires so the tires may rotate freely Once everything on the shaft is secure move these assembled parts to the baler Rest the feet on the axel and rotate the device into the baler until the clamps hit the outer baler frame Rotate the shaft upwards and take out the three pins to allow the bars to slide Once the tires are sitting on top of the main roller at the desired angle use locking pins to secure the outer telescoping tubes to the gusset plates Also finish tightening all three flanged nuts at the top of the outer telescoping tubes to the gusset plates to insure that the tubes will not rotate The next step would be to re pin the inner and outer telescoping tubes together as the tires are pressing against the roller in the baler to maintain that precise spacing Assembly 3 Hook up hoses to the air supply Connect the regulator to the main hose and the other three hoses to the three prong valve system Secure the cylinder brackets to the pneumatic cylinders and screw on all three rubber tips to the pneumatic cylinders Proceed to connect the hoses to the back end of the pneumatic cylinders Separately bolt the tray connector pieces to the far end larger end of the tray with simple hardware
59. tic cylinder with rubber bumper actuated and pushing against block Figure 6 The pneumatic components of the design leading to the air supply on left and 3 cylinders above Metric Testing Plans The following set of test plans outlines how the team attempted to validate all performance metrics within the design The team made an effort to develop tests which would provide results which could be used to easily determine whether the sponsor s wants and constraints were met Customer Want Can be operated by one technician Metric Prototype Weight Target Value 100lb Objective of Testing The objective of this test is to verify that weight of the prototype satisfies the constraint set by CNH CNH desires a machine that can be operated by one technician This means the operator must be able to lift install and run the mechanism without assistance from another person The design team saw weight as the biggest factor in this constraint and used weight as a metric to measure whether or not one person would be able to operate the machine by his or herself The team discussed with the sponsor and assigned this weight metric with a value of 100lb Therefore if the prototype of the assembly weighs less than 100lb then the mechanism successfully meets the requirement of being operable by one person Description of the Test Rationale and Procedures The measurement device in this test will be a simple scale The person performing the test will
60. tray and the baling chamber wall enables the netting to flow through these gaps as well as bunch at the beginning of the tray rather than funnel the netting down the tray The tray also tends to sag in the middle This sagging causes the tray to make contact with the baler rollers and induces bouncing during testing The gap between the tray and the baler roller is large enough where the netting could possibly funnel down into this gap Revision The tray width needs to be extended to leave a minimal gap between the baling chamber wall and the tray This will prevent the netting from possibly funneling into the gaps between the baler wall and tray Drilling holes into the lower walls of the tray will allow for a bolt to securely attach the tray to the prototype and minimize the gap between the baller roller and the tray A metal bar should also be welded or adhesively attached to the underside of the tray to prevent the middle from sagging Netting Concern Different types of netting were used while testing of the prototype These different types of netting led to some differences in test results Much of the testing was performed using orange striped netting and it was observed that this netting tended to fail more easily at higher PTO speeds whereas when a blue stripped netting was used tearing did not occur Revision 47 This issue should not concern the type of netting utilized during testing but rather emphasize the mechanical differences
61. ttachment Spacer i Drawn By CNH Design Team Date 10 31 11 faga cc NEENNENNML GEN a apia DWG NO 8454072 COPS inng accom O Billing Account 67 6 000 All Dimensions in inches Tolerances Project or Class MEEG 401 Senior Design Unless Otherwise Sponsored By CNH America LLC Noted Drawing THe 934560705 Inner Clamp Piece SUPPORT Drawn By CNHDesignTeam Date 10 31 11 Approved By Date 1 32 Material CD Flat ASTM A108 1018 Angular Scale 1 2 DWG NO 84560705 Fractional 0 5De E Billing Account 68 0 125 All Dimensions in inches Tolerances Project or Class MEEG 401 Senior Design Unless Otherwise Sponsored By CNH America LLC Noted Decimal Drawing Title 34560710 L Bracket Tray Support XXX 005 ANGLE XX 010 x x50 LPRWRBY CNHDesignTeam Date 10 31 11 ASTM A 1008 CS TYPEB Angular Scale 1 2 DWG NO 84560710 0 5 Deg Tm Billing Account 4x0 105 14 x 00 531 l eo 2 x c All Dimensions in inches Tolerances Project or Class MEEG 401 Senior Design Unless Otherwise Sponsored By CNH America LLC Noted Drawing Title 84560708 Inner Telescoping Tube Drawn By CNH Design Team Date 10 31 11 Fractional Approved By Date E32 Material PURCHASED PART Quantity 3 TO BE MODIFIED Angular Scale 1 5 DWG NO 94560708 t 0 5 Deg Billing Account 70 All Dimensions i
62. ure measure by hand the width and height of the prototype Measurements can be taken at various lengths apart from one another to ensure with confidence that previous measurements were correct or lie within the given constraint target value Data Collection Plan In a listing format record the width and height measurements on paper Table 8 Sample Width Height Wi B W N Data Analysis Methods Determine whether or not the measurements found lie within the given constraints These constraints consist of a maximum width of four feet and maximum height of six feet If so to further confirm this pick up the prototype and set it on the axel rotate it into the back end of the baler and see first hand if it fits inside and under the rubber belts Failure Analysis If it so happens that the width and height requirements are not met immediate action has to be done possibly extra machining by the team to fix the problem Resources Test Equipment Pen and paper tape measure assembled prototype 16 Customer Want Minimal time between trials Metric Time between trials set up time Target Value 2 minutes Objective Measure the time between X number of trials and compare these to the target values Description of Test Rationale and Procedures This test will determine if two people are able to set up and run the prototype safely and effectively ina timely manner between each cycle Experim

Wrapping Test System for CNH Round Balers

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