1、 WORLDWIDE ENGINEERING STANDARDS Test Procedure GMW16983 Multi-Piece Applique Retention Test Copyright 2013 General Motors Company All Rights Reserved August 2013 Page 1 of 7 1 Scope Note: Nothing in this standard supercedes applicable laws and regulations. Note: In the event of conflict between the
2、 English and domestic language, the English language shall take precedence. 1.1 Purpose. The purpose of this procedure is to determine if a multi-piece applique meets the retention requirements of the Subsystem Technical Specification (SSTS). 1.2 Foreword. Not applicable. 1.3 Applicability. This tes
3、t procedure is to be used for multi-piece appliques which utilize snap attachments between the Class A and Class B part (see Figure 1). Figure 1: Example of Multi-Piece Applique 2 References Note: Only the latest approved standards are applicable unless otherwise specified. 2.1 External Standards/Sp
4、ecifications. None 2.2 GM Standards/Specifications. GMW3221 2.3 Additional References. None 3 Resources 3.1 Facilities. 3.1.1 Calibration. The test facilities and equipment shall be in good working order and shall have a valid calibration label. Copyright General Motors Company Provided by IHS under
5、 license with General Motors CompanyNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-GM WORLDWIDE ENGINEERING STANDARDS GMW16983 Copyright 2013 General Motors Company All Rights Reserved August 2013 Page 2 of 7 3.1.2 Alternatives. Alternative test facilities and equ
6、ipment may also be used. However, all measuring variables as specified in this standard shall be determined correctly with respect to their physical definition. 3.2 Equipment. Note: The following items are typically required to perform this test. Other equipment may be substituted at the discretion
7、of the testing facility as long as it provides the same data with equivalent accuracy and is approved by the requesting GM Engineer. 3.2.1 Fixture. 3.2.1.1 Test Supports. The test part must be securely fastened to supports that represent part attachment to the vehicle. If available, the mating sheet
8、 metal may be used to support the part during test. 3.2.2 Instrumentation. 3.2.2.1 Tension Tester. Tension tester with 250 N load capability. 3.2.2.2 Handheld Force Gauge. A handheld force gauge with 250 N load capability may be used if approved by the design engineer (DE) and subsystem validation e
9、ngineer (SVE). In cases where the handheld force gauge is used, pull as slowly and consistently as possible to minimize variation. 3.2.2.3 Force Recording Equipment. Force recording equipment with 250 N capability. 3.2.2.4 Tension Tester Attachments. 3.2.2.4.1 A hook attachment is required for the p
10、ull-off test. 3.2.2.4.2 An attachment per Figure 2 is required for the peel test. Figure 2: Diagram of Tip for Peel Test 3.2.3 Miscellaneous Tools. 3.2.3.1 Torque Wrench. A torque wrench is required to confirm that the minimum torque is used for the vehicle level attachments. 3.2.3.2 Drill and #58 D
11、rill Bit. A drill with a #58 drill bit is required to drill holes in the Class A part. 3.2.3.3 One (1) mm Steel Wire. Steel wire with an approximate diameter of 1 mm is routed between the Class A and Class B parts and through the holes drilled in the Class A part per 3.2.3.2. 3.2.3.4 Pull Bar. A met
12、al pull bar is required to conduct the pull-off test. 3.3 Test Vehicle/Test Piece. 3.3.1 Test Piece. The applique assembly is to be a production-representative part with the correct finish. Copyright General Motors Company Provided by IHS under license with General Motors CompanyNot for ResaleNo rep
13、roduction or networking permitted without license from IHS-,-,-GM WORLDWIDE ENGINEERING STANDARDS GMW16983 Copyright 2013 General Motors Company All Rights Reserved August 2013 Page 3 of 7 3.3.2 Sample Size. A sample size of three (3) parts is required for this test. 3.3.3 Conditioning. Condition to
14、 GMW3221, Code A. 3.4 Test Time. Calendar time: 1 day Test hours: 4 hours Coordination hours: 4 hours 3.5 Test Required Information. The peak pull-off and peel force to separate the Class A and Class B parts of the multi-piece applique assembly. 3.6 Personnel/Skills. Prior experience in setting up a
15、nd running similar tests and experience in the use of the referenced test equipment is critical to achieving the estimated times shown in 3.4. 4 Procedure 4.1 Preparation. 4.1.1 Before the test, verify the assembly part release or change level. Record this information on Data Sheet A1. 4.1.2 Pull-Of
16、f Test. 4.1.2.1 Hole Locations. With a #58 drill bit, drill holes through only the Class A part of the applique assembly. One (1) hole at center (Point 1), two (2) holes 75 mm from each end of the part (Point 2 and Point 3), and two (2) holes 200 mm from the center and end holes (Point 4 and Point 5
17、). Holes must be positioned between Class A and Class B snap attachment features (see Figure 3). Figure 3: Hole Locations 4.1.2.2 Wire Routing. Route 1 mm steel wire through holes drilled in 4.1.2.1 and around the pull bar (see Figure 4). Figure 4: Wire Routing Copyright General Motors Company Provi
18、ded by IHS under license with General Motors CompanyNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-GM WORLDWIDE ENGINEERING STANDARDS GMW16983 Copyright 2013 General Motors Company All Rights Reserved August 2013 Page 4 of 7 4.1.2.3 Part Assembly. Assemble the Cla
19、ss B part to the Class A part. Confirm that the wire routed per 4.1.2.2 does not prevent full engagement of the snaps during assembly. 4.1.3 Pull-Off and Peel Tests. 4.1.3.1 Test Piece Constraints. Attach applique assembly to test supports or mating sheet metal representing all part attachments to t
20、he vehicle. Use a torque wrench to verify that the minimum torque specification is used for all attachments. 4.2 Conditions. 4.2.1 Environmental Conditions. Test at (23 5) C (ambient). 4.2.2 Test Conditions. Deviations from the requirements of this standard shall have been agreed upon. Such requirem
21、ents shall be specified on component drawings, test certificates, reports, etc. 4.3 Instructions. 4.3.1 Pull-Off Test. 4.3.1.1 The applique assembly shall be supported as specified in 4.1.2.1. 4.3.1.2 The center of the pull bar shall be pulled normal to the surface of the applique assembly at an app
22、roximate rate of 50 mm/minute until there is separation between the Class A and Class B parts (see Figure 5). 4.3.1.3 Record force measurements on Data Sheet A1. Figure 5: Pull-Off Test 4.3.2 Peel Test. 4.3.2.1 The applique assembly shall be supported as specified in 4.1.2.1. 4.3.2.2 The attachment,
23、 per 3.2.2.4.2, shall be positioned between the Class A and Class B parts at the outboard end of the parts and pulled at an approximate rate of 50 mm/minute until there is separation between the Class A and Class B parts (see Figure 6). Copyright General Motors Company Provided by IHS under license
24、with General Motors CompanyNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-GM WORLDWIDE ENGINEERING STANDARDS GMW16983 Copyright 2013 General Motors Company All Rights Reserved August 2013 Page 5 of 7 Figure 6: Peel Test 4.3.2.3 Record force measurements on Data Sh
25、eet A1. 5 Data 5.1 Calculations. Peak force. 5.2 Interpretation of Results. Not applicable. 5.3 Test Documentation. The results of the measurements shall be presented in a test report to the involved GM Engineer at the conclusion of the test. 6 Safety This standard may involve hazardous materials, o
26、perations, and equipment. This standard does not propose to address all the safety problems associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use. 7 No
27、tes 7.1 Glossary. Not applicable. 7.2 Acronyms, Abbreviations, and Symbols. DE Design Engineer GSSLT Global Subsystem Leadership Team LH Left Hand RH Right Hand SSTS Subsystem Technical Specification SVE Subsystem Validation Engineer 8 Coding System This standard shall be referenced in other documen
28、ts, drawings, etc., as follows: Test to GMW16983 Copyright General Motors Company Provided by IHS under license with General Motors CompanyNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-GM WORLDWIDE ENGINEERING STANDARDS GMW16983 Copyright 2013 General Motors Comp
29、any All Rights Reserved August 2013 Page 6 of 7 9 Release and Revisions This standard was originated in June 2013. It was first approved by the Front/Rear Trim, Body Side Moldings, Box Trim Global Subsystem Leadership Team (GSSLT) in July 2013. It was first published in August 2013. Issue Publicatio
30、n Date Description (Organization) 1 AUG 2013 Initial publication. Copyright General Motors Company Provided by IHS under license with General Motors CompanyNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-GM WORLDWIDE ENGINEERING STANDARDS GMW16983 Copyright 2013 Ge
31、neral Motors Company All Rights Reserved August 2013 Page 7 of 7 Appendix A Data Sheet A1: Applique Assembly Retention Measurements Vehicle: _ Test Site: _ Model: _ Technician: _ Part Description: _ Part Number: _ Part Release Level: _ Measuring Instrument: _ Date: _ Calibrated Until: _ Pull Test Sa
32、mple Number Force (Newtons) 1 2 3 Peel Test Sample Number LH Side Force (Newtons) RH Side Force (Newtons) 1 2 3 LH = Left Hand RH = Right Hand Copyright General Motors Company Provided by IHS under license with General Motors CompanyNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-
