1、 WORLDWIDE ENGINEERING STANDARDS Test Procedure GMW16608 Determination of Outer Belt Position and Lip Interface to Glass Copyright 2011 General Motors Company All Rights Reserved June 2011 Originating Department: North American Engineering Standards Page 1 of 12 1 Scope Note: Nothing in this standar
2、d supercedes applicable laws and regulations. Note: In the event of conflict between the English and domestic language, the English language shall take precedence. 1.1 Purpose. To document and measure the sealing lip to glass interface and position of outer belt on the flange at multiple lip compres
3、sions for comparison to design, analytical and actual. 1.2 Foreword. Not applicable. 1.3 Applicability. This test procedure is applicable to all outer belt seals. 2 References Note: Only the latest approved standards are applicable unless otherwise specified. 2.1 External Standards/Specifications. N
4、one 2.2 GM Standards/Specifications. None 3 Resources 3.1 Facilities. Not applicable. 3.2 Equipment. 3.2.1 Digital Camera. Ten (10) megapixels minimum. 3.2.2 Camera Slide. See Figure A1. When camera is attached to slide fixture, the camera must be square to the base of the fixture. Use a level to ve
5、rify. 3.2.3 Glass Plate. Clear, tint-free, flat glass panel, 4 mm thick, and of adequate height so that panel extends a minimum of 25 mm above the top of the test sample when assembled in the fixture. (Note: Glass panel shall have no curvature and shall be automotive or plate glass; laminated glass
6、is not acceptable). Length of glass panel shall be longer than the test specimen, but shorter than the fixture base. See Figure A2. 3.2.4 Fixture. Wire burn fixture representative of door environment (door outer with outer belt reinforcement). Any retention features in the center of the belt, (i.e.,
7、 pumpkin teeth) shall be represented in the wire burn at the end of the fixture (where the picture is taken). Fixtures shall be made of aluminum. The length of the Electric Discharge Machining (EDM) wire burn shall be at 100 5 mm in length. The fixture base shall be square to allow for perpendicular
8、 positioning relative to the camera. The fixture base must allow for secure perpendicular positioning (horizontally and vertically) below the camera. Fixture must include locking grooves to ensure that test pieces are securely held at the specified compression positions. (Maximum gap, Nominal, Minim
9、um gap). See Figure A3. 3.2.5 Flat bottom glass dish of sufficient size to hold one (1) sample. 3.2.6 Deionized water. 3.2.7 Scales. 0.5 mm increments. 3.2.8 Light. High intensity lighting (i.e., microscope lighting), sufficient to remove all background shadows. 3.2.9 Box to reflect light. Copyright
10、 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 GMW16608 Copyright 2011 General Motors Company All Rights Reserved June 2011 Page 2 of 12 3.3 Test Ve
11、hicle/Test Piece. 3.3.1 Four (4) 100 5 mm test pieces shall be cut from one (1) straight length extrusion prior to any finishing operations (i.e., stretch bending). End cuts must be clean, square, and free from burrs. Samples must be cut with no distortion to test piece. 3.4 Test Time. Not applicabl
12、e. 3.5 Test Required Information. Not applicable. 3.6 Personnel/Skills. Not applicable. 4 Procedure 4.1 Preparation. 4.2 Conditions. 4.2.1 Environmental Conditions. The minimum time between vulcanization and testing of elastomers shall be 72 h. The test pieces shall be maintained at a temperature of
13、 23 5 C and 50 5% relative humidity for at least 24 h prior to test and shall be free from 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, r
14、eports, etc. 4.3 Instructions. 4.3.1 Method A - Lip Interface. Three (3) test pieces are needed for this method. Test shall be run in maximum gap, nominal, then minimum gap order. Glass shall be inserted into fixture base prior to test. Wire burn fixture is not mounted to base at the beginning of th
15、e test. 4.3.1.1 Place test sample (flocked lips face down) into the glass dish containing enough deionized water to cover the lips. Leave sample in water for one (1) minute. 4.3.1.2 Insert one test piece onto wire burn fixture. 4.3.1.3 Mount and secure wire burn fixture to the fixture base at maximu
16、m gap position. 4.3.1.4 Position fixture base horizontally under camera lens. Place scale on glass plate, perpendicular to the sample. See Figures A4 and A5. 4.3.1.5 Photograph the sample. Save picture to file. 4.3.1.6 Remove test piece and wire burn from the fixture. (Do not remove test piece from
17、wire burn fixture). 4.3.1.7 Dry glass. Rewet test piece by placing sample back into glass dish as in 4.3.1.1. Repeat 4.3.1.2 through 4.3.1.6 two (2) more times at the same condition using the same sample. 4.3.1.8 Place wire burn with sample onto fixture base at nominal position. Repeat 4.3.1.2 to 4.
18、3.1.7 for nominal and minimum gap positions for each of the test pieces. 4.3.1.9 From pictures, measure and record the lip interface area for each position, to the nearest 0.5 mm. See Figure A10. 4.3.1.10 Compare results with Finite Element Analysis (FEA) results. 4.3.2 Method B Outer Belt Position.
19、 One (1) test piece is needed for this method. Test shall be run in maximum gap, nominal and minimum gap order. Glass shall be inserted into fixture base prior to test. 4.3.2.1 Attach and secure wire burn fixture to base in the maximum gap position. 4.3.2.2 Insert test piece onto wire burn fixture.
20、4.3.2.3 Align edge of glass with edge of sample. See Figure A6. 4.3.2.4 Attach scales to fixture as shown in Figure A7. 4.3.2.5 Position fixture vertically under camera lens. See Figure A8. 4.3.2.6 Photograph sample. Photograph must encompass total end view including wire burn fixture. See Figure A9
21、. Save picture to file. 4.3.2.7 Do not remove sample from wire burn fixture. Move the wire burn fixture to nominal gap position. Repeat 4.3.2.2 to 4.3.2.6 for nominal and minimum gap positions. 4.3.2.8 From pictures, measure and record the V-Gap to the nearest 0.5 mm. See figure A9. 4.3.2.9 Compare
22、results with FEA results. 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 GMW16608 Copyright 2011 General Motors Company All Rights Reserved
23、 June 2011 Page 3 of 12 5 Data 5.1 Calculations. Not applicable. 5.2 Interpretation of Results. Not applicable. 5.3 Test Documentation. 5.3.1 Photo files for both methods. 5.3.2 Lip interface measurements. 6 Safety This standard may involve hazardous materials, operations, and equipment. This standa
24、rd 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 Notes 7.1 Glossary. Not applicable. 7.2
25、 Acronyms, Abbreviations, and Symbols. EDM Electric Discharge Machining FEA Finite Element Analysis 8 Coding System This standard shall be referenced in other documents, drawings, etc., as follows: Test to GMW16608 9 Release and Revisions This standard was originated in May 2011. It was first approv
26、ed by the Weatherstrip GSSLT in June 2011. It was first published in June 2011. Issue Publication Date Description (Organization) 1 JUN 2011 Initial publication. Copyright General Motors Company Provided by IHS under license with General Motors CompanyNot for ResaleNo reproduction or networking perm
27、itted without license from IHS-,-,-GM WORLDWIDE ENGINEERING STANDARDS GMW16608 Copyright 2011 General Motors Company All Rights Reserved June 2011 Page 4 of 12 Appendix A Figure A1: Camera Slide Copyright General Motors Company Provided by IHS under license with General Motors CompanyNot for ResaleN
28、o reproduction or networking permitted without license from IHS-,-,-GM WORLDWIDE ENGINEERING STANDARDS GMW16608 Copyright 2011 General Motors Company All Rights Reserved June 2011 Page 5 of 12 Figure A2: Glass in Fixture Copyright General Motors Company Provided by IHS under license with General Mot
29、ors CompanyNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-GM WORLDWIDE ENGINEERING STANDARDS GMW16608 Copyright 2011 General Motors Company All Rights Reserved June 2011 Page 6 of 12 Figure A3: Fixture, Fixture Base, and Locking Grooves Copyright General Motors Co
30、mpany Provided by IHS under license with General Motors CompanyNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-GM WORLDWIDE ENGINEERING STANDARDS GMW16608 Copyright 2011 General Motors Company All Rights Reserved June 2011 Page 7 of 12 Figure A4: Horizontal Placeme
31、nt of Fixture Under Camera 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 GMW16608 Copyright 2011 General Motors Company All Rights Reserve
32、d June 2011 Page 8 of 12 Figure A5: Horizontal Placement of Fixture Under Camera Figure A6: Glass Alignment with Edge of Sample Copyright General Motors Company Provided by IHS under license with General Motors CompanyNot for ResaleNo reproduction or networking permitted without license from IHS-,-,
33、-GM WORLDWIDE ENGINEERING STANDARDS GMW16608 Copyright 2011 General Motors Company All Rights Reserved June 2011 Page 9 of 12 Figure A7: Scale Attachment Copyright General Motors Company Provided by IHS under license with General Motors CompanyNot for ResaleNo reproduction or networking permitted wi
34、thout license from IHS-,-,-GM WORLDWIDE ENGINEERING STANDARDS GMW16608 Copyright 2011 General Motors Company All Rights Reserved June 2011 Page 10 of 12 Figure A8: Vertical Placement of Sample Under Camera Copyright General Motors Company Provided by IHS under license with General Motors CompanyNot
35、for ResaleNo reproduction or networking permitted without license from IHS-,-,-GM WORLDWIDE ENGINEERING STANDARDS GMW16608 Copyright 2011 General Motors Company All Rights Reserved June 2011 Page 11 of 12 Figure A9: Documentation of V-Gap Copyright General Motors Company Provided by IHS under licens
36、e with General Motors CompanyNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-GM WORLDWIDE ENGINEERING STANDARDS GMW16608 Copyright 2011 General Motors Company All Rights Reserved June 2011 Page 12 of 12 Figure A10: Example of Lip Contact Area Copyright General Motors Company Provided by IHS under license with General Motors CompanyNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-
