1、 WORLDWIDE ENGINEERING STANDARDS Test Procedure GMW14596 Steering Wheel Assembly, Heat Distortion Copyright 2011 General Motors Company All Rights Reserved September 2011 Originating Department: North American Engineering Standards Page 1 of 5 1 Scope Note: Nothing in this standard supercedes applic
2、able 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 evaluate the steering wheel assembly for resistance to appearance degrading effects due to heat distortion, for clearance to the steering c
3、olumn, clearance to driver airbag and for electrical function of horn switch. 1.2 Foreword. Not applicable. 1.3 Applicability. All steering wheel assemblies used in passenger cars, Multipurpose Passenger Vehicles (MPV), and trucks. 2 References Note: Only the latest approved standards are applicable
4、 unless otherwise specified. 2.1 External Standards/Specifications. None 2.2 GM Standards/Specifications. None 2.3 Additional References. None 3 Resources 3.1 Facilities. Use facilities having the test equipment described in 3.2. 3.2 Equipment. 3.2.1 Circulating-air oven capable of maintaining a tem
5、perature up to 100 C. 3.2.2 A fixture built to simulate the top of a steering column; dimensions minus nominal 20 5 degree column angle. 3.2.3 Steering System. Test equipment to electrically monitor and record function of horn switch assembly. Note: All instrumentation is to be calibrated as require
6、d; record instrumentation details and date of calibration on Data Sheet A1, unless the information is otherwise preserved in the testing laboratory records. 3.3 Test Vehicle/Test Piece. 3.3.1 Test Materials/Components. Steering wheel assembly. 3.4 Test Time. Not applicable. Calendar time: days Test
7、hours: hours Coordination hours: hours 3.5 Test Required Information. Not applicable. 3.6 Personnel/Skills. 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
8、WORLDWIDE ENGINEERING STANDARDS GMW14596 Copyright 2011 General Motors Company All Rights Reserved September 2011 Page 2 of 5 4 Procedure 4.1 Preparation. 4.1.1 Assemble steering wheel to fixture. Fastener assembly torque is to be specified by requesting engineer and noted on Data Sheet A2. 4.1.2 In
9、spect the steering wheel for clearance to the fixture: to establish baseline before running test (see 3.2.2). Note condition on Data Sheet A2. 4.1.2.1 Observe overall appearance of steering wheel. For example: trimplate to foam, backcover to foam or leather, leather to spokes and tuck grooves. 4.1.3
10、 Prepare connection of test equipment to continuously monitor horn switch throughout temperature exposure to detect any inadvertent horn actuation. 4.1.4 Assemble driver airbag to steering wheel. 4.1.5 Inspect the clearance of driver airbag to steering wheel to establish baseline before running test
11、. Select three (3) points across top of module, also at all spoke interfaces and three (3) points along bottom of module to steering wheel. Note condition on Data Sheet A2. 4.1.5.1 Take pre-test photos of interface front and back of steering wheel and driver airbag assembly. 4.2 Conditions. 4.2.1 En
12、vironmental Conditions. Not applicable. 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 Appearance and Clearance Test. 4.3.1.1 Pl
13、ace the steering wheel/driver airbag assembly and fixture in the oven at 96 2 C for 6.0 0.2 h. 4.3.1.2 Remove steering wheel/driver airbag assembly and fixture from oven and allow to cool at room temperature for at least 30 minutes. 4.3.1.3 Observe the overall appearance of the steering wheel. Recor
14、d any distortions obvious to the unaided eye on Data Sheet A2. Record distortions greater than 1.0 mm in the steering wheel to column or airbag gaps and greater than 2.0 mm in other areas on Data Sheet A2. 4.3.1.3.1 Take post-test photo of interfaces front and back of steering wheel and driver airba
15、g assembly. 4.3.1.4 Inspect the steering wheel for clearance to the fixture and record any interference on Data Sheet A2. 4.3.1.5 Remove steering wheel from fixture. 4.3.1.6 Reassemble the steering wheel to fixture, using the specified fastener torque, and record any interference on Data Sheet A2. 4
16、.3.2 Horn Switch Monitoring. Record if and when steering wheel horn switch is activated by either temperature and/or distortion. See Data Sheet A2. 5 Data 5.1 Calculations. Not applicable. 5.2 Interpretation of Results. Not applicable. 5.3 Test Documentation. Record pertinent test results on the sup
17、plied data sheets. 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 safety and health practices
18、and determine the applicability of regulatory limitations prior to use. 7 Notes 7.1 Glossary. Not applicable. 7.2 Acronyms, Abbreviations, and Symbols. Copyright General Motors Company Provided by IHS under license with General Motors CompanyNot for ResaleNo reproduction or networking permitted with
19、out license from IHS-,-,-GM WORLDWIDE ENGINEERING STANDARDS GMW14596 Copyright 2011 General Motors Company All Rights Reserved September 2011 Page 3 of 5 MPV Multipurpose Passenger Vehicles 8 Coding System This standard shall be referenced in other documents, drawings, etc., as follows: Test to GMW1
20、4596 9 Release and Revisions This standard was originated in October 2005. It was first approved by the Steering Wheel Global Subsystem Leadership Team in March 2006. It was first published in March 2006. Issue Publication Date Description (Organization) 1 MAR 2006 Initial publication. 2 SEP 2011 5
21、year refresh, Update to one column format, Add driver airbag to steering wheel pre-test measurement. (Interiors) 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 E
22、NGINEERING STANDARDS GMW14596 Copyright 2011 General Motors Company All Rights Reserved September 2011 Page 4 of 5 Appendix A Data Sheet A1: Instrument Calibration Report Number: _ Submit this data sheet with the other data sheets when the information is not otherwise preserved in the testing labora
23、tory records. Test Procedure Number: GMW14596 Test Date: _ Instrument Description Instrument Number Calibration Date Next Calibration Due Date 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 Recorded by: Date: (Signature) Copyright General Motors Company Provided by IHS under license with General
24、 Motors CompanyNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-GM WORLDWIDE ENGINEERING STANDARDS GMW14596 Copyright 2011 General Motors Company All Rights Reserved September 2011 Page 5 of 5 Data Sheet A2: Steering Wheel Assembly, Heat Distortion Test/Report Numbe
25、r: Report Date: Part Data Vehicle Make Model Year Description Part Number Steering Wheel Assembly Number Prototype Production Test Data 4.1.1 Fastener Torque _ Nm 4.1.2 Clearance between steering wheel and fixture acceptable? Yes No Gap between steering wheel and fixture 4.1.2.1 Overall appearance o
26、f steering wheel 4.1.5 Gap between steering wheel and airbag 4.3.1 Appearance and Clearance Test 4.3.1.3 Distortion obvious to the unaided eye? Yes No If “yes”, describe and, if applicable, record gaps between steering wheel and fixture and/or airbag. 4.3.1.4 Steering wheel interference with fixture
27、? Yes No If “yes”, describe 4.3.1.6 Interference during reassembly? Yes No If “yes”, describe 4.3.2 Horn Switch Monitoring Horn Actuated? Yes No If “yes”, describe Photos Attach Pre and Post-Test Photos Recorded by Date (Signature) Copyright General Motors Company Provided by IHS under license with General Motors CompanyNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-
