1、 WORLDWIDE ENGINEERING STANDARDS Test Procedure GMW16926 Molding and Emblem Adhesion Test Pluck Resistance Copyright 2013 General Motors Company All Rights Reserved August 2013 Page 1 of 14 1 Scope Note: Nothing in this standard supercedes applicable laws and regulations. Note: In the event of confl
2、ict between the English and domestic language, the English language shall take precedence. 1.1 Purpose. This standard describes a test procedure to determine the adhesion (pluck resistance) of automotive moldings and emblems attached with pressure sensitive adhesive tape to test panels coated with a
3、n approved current exterior automotive paint system. 1.2 Foreword. Not applicable. 1.3 Applicability. This test procedure determines the adhesion (pluck resistance) of automotive moldings and emblems. 2 References Note: Only the latest approved standards are applicable unless otherwise specified. 2.
4、1 External Standards/Specifications. None 2.2 GM Standards/Specifications. 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. 3.1.2 Alternatives. Alternative test facilities and equipment may
5、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. 3.2.1 Apparatus. 3.2.1.1 Clamp (see sketches in Figures A1 through A6, and pictures of typical fixtures in Figures A10 and A11) jaws ma
6、y be modified to conform to a specific molding or emblem. Example is shown on Figure A7. 3.2.1.2 Tensile machine capable of controlled 60 mm/minute speed and 150 kg load. 3.2.1.3 Cold Rolled Steel panels, 100 mm 300 mm 0.90 mm, painted on one (1) side with current production exterior paint system. P
7、anels shall be contoured to match specific sheet metal surface if specified on applicable part drawings. 3.3 Test Vehicle/Test Piece. Not applicable. 3.4 Test Time. Not applicable. 3.5 Test Required Information. Not applicable. 3.6 Personnel/Skills. Not applicable. Copyright General Motors Company P
8、rovided by IHS under license with General Motors CompanyNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-GM WORLDWIDE ENGINEERING STANDARDS GMW16926 Copyright 2013 General Motors Company All Rights Reserved August 2013 Page 2 of 14 4 Procedure 4.1 Preparation. 4.1.1
9、 Sample Preparation. All samples are to be conditioned at 23 C 2 C before and during testing unless otherwise specified. 4.1.1.1 Clean the test panels with a 1:1 mixture of isopropyl alcohol and distilled water. Wipe and dry thoroughly with a clean cloth or tissue. 4.1.1.2 Prepare moldings or emblem
10、s as follows: 4.1.1.2.1 Moldings: Cut Moldings to 25 mm long sections. 4.1.1.2.2 Emblems: Use emblems as complete assembly; do not cut. 4.1.1.3 Remove the tape liner and apply molding or emblem to painted panel. Roll one (1) pass with a 9.1 kg (20 lb) roller. 4.1.1.4 Age panel and molding assemblies
11、 for 72 h at ambient temperature of 23 C 2 C prior to testing. Samples are tested as received (72 h applied to panel) and/or following environmental exposures as required by individual specifications. 4.2 Conditions. 4.2.1 Environmental Conditions. Not applicable. 4.2.2 Test Conditions. Deviations f
12、rom the requirements of this standard shall have been agreed upon. Such requirements shall be specified on component drawings, test certificates, reports, etc. 4.3 Instructions. 4.3.1 Test Procedure. 4.3.1.1 Attach the 25 mm clamp securely to the sides of moldings or emblems, as shown on Figure A8.
13、Note that clamp is centered on emblems. 4.3.1.2 Care must be exercised not to set the clamp excessively tight so as to pry up the tape initiating a peel separation, as shown on Figure A9. 4.3.1.3 Using a tensile machine with controlled speed of 60 mm/minute; attach the clamp and load at 90 degrees (
14、normal) to the panel surface. 4.3.1.4 Report the maximum load to initiate separation of the molding or emblem from the panel in Newtons (N). If the grips pull from the sample prior to adhesive separation, report the load in Newtons at which the grips pull from the sample. 5 Data 5.1 Calculations. No
15、t applicable. 5.2 Interpretation of Results. Not applicable. 5.3 Test Documentation. Not applicable. 6 Safety This standard may involve hazardous materials, operations, and equipment. This standard does not propose to address all the safety problems associated with its use. It is the responsibility
16、of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use. 7 Notes 7.1 Glossary. Not applicable. 7.2 Acronyms, Abbreviations, and Symbols. Not applicable. Copyright General Motors Company Provided by IHS u
17、nder license with General Motors CompanyNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-GM WORLDWIDE ENGINEERING STANDARDS GMW16926 Copyright 2013 General Motors Company All Rights Reserved August 2013 Page 3 of 14 8 Coding System This standard shall be referenced
18、in other documents, drawings, etc., as follows: Test to GMW16926 9 Release and Revisions This standard was originated in February 2013. It was first approved by the Emblems, Nameplates and Sill Plates Global Subsystem Leadership Team in August 2013. It was first published in August 2013. Issue Publi
19、cation 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 GMW16926 Copyright 20
20、13 General Motors Company All Rights Reserved August 2013 Page 4 of 14 Appendix A Figure A1: Adhesion Test Fixture for Pressure Sensitive Moldings and Ornaments, Closed Position Copyright General Motors Company Provided by IHS under license with General Motors CompanyNot for ResaleNo reproduction or
21、 networking permitted without license from IHS-,-,-GM WORLDWIDE ENGINEERING STANDARDS GMW16926 Copyright 2013 General Motors Company All Rights Reserved August 2013 Page 5 of 14 Figure A2: Outer Blocks, Test Fixture Copyright General Motors Company Provided by IHS under license with General Motors C
22、ompanyNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-GM WORLDWIDE ENGINEERING STANDARDS GMW16926 Copyright 2013 General Motors Company All Rights Reserved August 2013 Page 6 of 14 Figure A3: Fixture Edge Copyright General Motors Company Provided by IHS under licen
23、se with General Motors CompanyNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-GM WORLDWIDE ENGINEERING STANDARDS GMW16926 Copyright 2013 General Motors Company All Rights Reserved August 2013 Page 7 of 14 Figure A4: Hex Head Nut with M6X1 Thread Stud Copyright Gene
24、ral 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 GMW16926 Copyright 2013 General Motors Company All Rights Reserved August 2013 Page 8 of 14 Figure A5: Dri
25、ll Rod 6 mm Diameter 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 GMW16926 Copyright 2013 General Motors Company All Rights Reserved Augu
26、st 2013 Page 9 of 14 Figure A6: Center Block, Test Fixture 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 GMW16926 Copyright 2013 General M
27、otors Company All Rights Reserved August 2013 Page 10 of 14 Figure A7: Crest Pluck Blocks 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 GM
28、W16926 Copyright 2013 General Motors Company All Rights Reserved August 2013 Page 11 of 14 Figure A8: Attaching Pluck Clamp Copyright General Motors Company Provided by IHS under license with General Motors CompanyNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-GM
29、WORLDWIDE ENGINEERING STANDARDS GMW16926 Copyright 2013 General Motors Company All Rights Reserved August 2013 Page 12 of 14 Figure A9: Proper Attaching Under Molding Copyright General Motors Company Provided by IHS under license with General Motors CompanyNot for ResaleNo reproduction or networking
30、 permitted without license from IHS-,-,-GM WORLDWIDE ENGINEERING STANDARDS GMW16926 Copyright 2013 General Motors Company All Rights Reserved August 2013 Page 13 of 14 Figure A10: Picture of Typical Fixture Copyright General Motors Company Provided by IHS under license with General Motors CompanyNot
31、 for ResaleNo reproduction or networking permitted without license from IHS-,-,-GM WORLDWIDE ENGINEERING STANDARDS GMW16926 Copyright 2013 General Motors Company All Rights Reserved August 2013 Page 14 of 14 Figure A11: Picture of Fixture Setup Copyright General Motors Company Provided by IHS under license with General Motors CompanyNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-
