1、 WORLDWIDE ENGINEERING STANDARDS Test Procedure SUPERCEDED GMW15691 Wear Resistance Test for Coated Weatherstrip Bulbs Do Not Use on New Programs; Replaced by GMW16953 Copyright 2013 General Motors Company All Rights Reserved June 2013 Page 1 of 4 1 Scope Note: Nothing in this standard supersedes ap
2、plicable laws and regulations. Note: In the event of conflict between the English and domestic language, the English language shall take precedence. 1.1 Purpose. This standard describes the procedure to test and evaluate the resistance to wear/scuff of the coated weatherstrip bulb. 1.2 Foreword. Not
3、 applicable. 1.3 Applicability. This standard is applicable to all coated body seals with bulbs. 2 References Note: Only the latest approved standards are applicable unless otherwise specified. 2.1 External Standards/Specifications. None 2.2 GM Standards/Specifications. None 3 Resources 3.1 Faciliti
4、es. Not applicable. 3.2 Equipment. 3.2.1 Wear Test Fixture. See Appendix A, Figure A1, and Figure A3 or Benz Fisher Abrader, having an electrical motor that operates at 15 cycles per minute. This drives the work arm(s) for 100 mm in a drag-lift-return motion and runs perpendicular to the weatherstri
5、p sample. The arm(s) have a 45 mm radius and a 300 10 g head that gets covered with a test wear fabric and has an actual sample contact surface of 90 5 mm. 3.2.2 Wear fabric made of 1.33 Carded Cotton Wrap Sateen, 100% bleached, 235 g/m2. Fabric source: Testfabrics, Inc. (), number 428, or equivalen
6、t. 3.3 Test Vehicle/Test Piece. Cut a specimen length suitable to fit under one or all of the arms on the test fixture. Specimen must not have any wrinkles or other discrepancies. 3.4 Test Time. Not applicable. 3.5 Test Required Information. Not applicable. 3.6 Personnel/Skills. Not applicable. 4 Pr
7、ocedure 4.1 Preparation. Not applicable. 4.2 Conditions. 4.2.1 Environmental Conditions. The minimum time between manufacturing and testing shall be 72 h. The test pieces shall be maintained at a temperature of 23 5C and 50 5% relative humidity for at least 24 h prior to test and shall be free from
8、strain during this period. 4.2.2 Test Conditions. Deviations from 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 Cut the fabric to a size sufficient to cover and be se
9、curely attached to the test head. Identify the fabrics abradant wear side with an “X“ marking. This is the side with the non-uniform long floats (see Figure A3). This side faces and contacts the weatherstrip specimen and runs perpendicular to the weatherstrip bulbs center line. Install the wear fabr
10、ic onto test fixture arm(s) to be used. Pull and wrap the fabric snugly around the test arm radius. The fabric shall not be used if it becomes wrinkled or torn at any time during the test period. 4.3.2 Insert and secure the weatherstrip sample and any setup fixtures needed to prevent the movement of
11、 the weatherstrip from the fixtures base. 4.3.3 Set the cycle counter to 600 cycles so it stops for period observation of the weatherstrip for any unusual wear or conditions. Continue the cycling until the specified number of test cycles. 5 Data 5.1 Calculations. Not applicable. 5.2 Interpretation o
12、f Results. Not applicable. 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 GMW15691 Copyright 2013 General Motors Company All Rights Reserve
13、d June 2013 Page 2 of 4 5.3 Test Documentation. With reference to this test procedure, the results shall be represented in a test report. The report shall include the following: 5.3.1 Complete identification of the specimen. 5.3.2 Conditioning of the test specimen. 5.3.3 Test conditions. 5.3.4 Any d
14、eviations to the test procedure. 5.3.5 Observations of the condition of each tested area. 5.3.6 Number of cycles before coating wear-through. 5.3.7 Number of tested locations, that average value of cycles and the range value of the same sample lot. 5.3.8 Report if a control specimen was also tested,
15、 and if so, include test data for the control. 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 of the user of this standard to establish appropriate
16、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. 8 Coding System This standard shall be referenced in other documents, drawings, etc., as follows: Test t
17、o GMW15691 9 Release and Revisions 9.1 Release. This standard originated in September 2007. It was first approved by the Global Elastomers Team in June 2008. It was first published in June 2008. Issue Publication Date Description (Organization) 1 JUN 2008 Initial publication. 2 JUN 2013 Superceded b
18、y GMW16953. (Elastomers GSSLT) 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 GMW15691 Copyright 2013 General Motors Company All Rights Res
19、erved June 2013 Page 3 of 4 Appendix A WEAR RESISTANCE TEST Note: All dimensions are in mm Figure A1: View of Wear Test Fixture (Head) Note: View of the abradant side, as shown above. Having the long Floats Mark this side with an “X”. View of Nonabradant side with a uniform weaved pattern Figure A2:
20、 Test Fabric 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 GMW15691 Copyright 2013 General Motors Company All Rights Reserved June 2013 Page 4 of 4 Figure A3: Example of Wear Resistance Test Machine Copyright General Motors Company Provided by IHS under license with General Motors CompanyNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-
