1、 WORLDWIDE ENGINEERING STANDARDS Test Procedure GMW15046 Friction Coefficient of Window Regulator Slider Copyright 2011 General Motors Company All Rights Reserved June 2011 Originating Department: North American Engineering Standards Page 1 of 4 1 Scope Note: Nothing in this standard supercedes appl
2、icable 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 determine the friction coefficient of window regulator slider, which affects the performance of glass guidance system. The information is
3、 used in Computer Aided Engineering (CAE) model to predict the performance of glass guidance system. 1.2 Foreword. Not applicable. 1.3 Applicability. This procedure applies to all cable-drive regulator systems. 2 References Note: Only the latest approved standards are applicable unless otherwise spe
4、cified. 2.1 External Standards/Specifications. None 2.2 GM Standards/Specifications. None 3 Resources 3.1 Facilities. The regulator supplier is responsible for this test, which should be performed at suppliers facilities. 3.2 Equipment. Test fixture as described in 4.3.1. 3.3 Test Vehicle/Test Piece
5、. Window Regulator Slider from window regulator assembly. 3.4 Test Time. Calendar time: 1 day Test hours: 1 hour Coordination hours: 1 hour 3.5 Test Required Information. Not applicable. 3.6 Personnel/Skills. Not applicable. 4 Procedure 4.1 Preparation. Not applicable. 4.2 Conditions. 4.2.1 Environm
6、ental Conditions. Test to be done at ambient at normal humidity. 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. Copyright General Motors Company Provide
7、d by IHS under license with General Motors CompanyNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-GM WORLDWIDE ENGINEERING STANDARDS GMW15046 Copyright 2011 General Motors Company All Rights Reserved June 2011 Page 2 of 4 Figure 1: Diagram of Cable over Slider with
8、 Weight Locations 4.3 Instructions. 4.3.1 Mount the slider in a fixed rigid fixture. Attach cable with a contact angle of 180 degrees. Remain equal length for both ends. 4.3.2 Hang equal weight to each end of cable. Record the weight (T2). 4.3.3 Gradually increase weight to 1 end of cable until the
9、cable begins to move. Record the final weight (T1). 4.3.4 Substitute T1, T2 into the equation in 5.1 to calculate the friction coefficient s. 4.3.5 Change the balance weight (T2), and repeat Steps 4.3.2 through 4.3.4 for another 4 estimates. 4.3.6 Average the 5 estimates. 5 Data 5.1 Calculations. Th
10、e friction coefficient of slider is estimated as follows: )TTln( 21s uWhere: s = friction coefficient T1 = final weight T2 = weight at each end of cable 5.2 Interpretation of Results. Not applicable. 5.3 Test Documentation. The table of the results (Data Sheet A1) in Appendix A shall be reported to
11、the responsible GM Product Engineer, and Validation Engineer. 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 establi
12、sh appropriate safety and health practices and determine the applicability of regulatory limitations prior to use. 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
13、 ENGINEERING STANDARDS GMW15046 Copyright 2011 General Motors Company All Rights Reserved June 2011 Page 3 of 4 7 Notes 7.1 Glossary. Glass Guidance System: A hardware subsystem of side-door, end-gate, or mid-gate which controls the movement of window glass. Slider: A component of window regulator,
14、in which the driving cable slides through the contact surface when the glass is in movement. Window Regulator: A hardware subsystem of glass guidance system, which provides the mechanism of glass movement. 7.2 Acronyms, Abbreviations, and Symbols. CAE Computer Aided Engineering 8 Coding System This
15、standard shall be referenced in other documents, drawings, etc., as follows: Test to GMW15046 9 Release and Revisions This standard was originated in January 2006. It was first approved by the Global Glass Guidance SSLT in July 2006. It was first published in August 2006. Issue Publication Date Desc
16、ription (Organization) 1 AUG 2006 Initial publication. 2 JUN 2011 Update template/references. (Global Glass Guidance SSLT) Copyright General Motors Company Provided by IHS under license with General Motors CompanyNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-GM W
17、ORLDWIDE ENGINEERING STANDARDS GMW15046 Copyright 2011 General Motors Company All Rights Reserved June 2011 Page 4 of 4 Appendix A Datasheet A1: Calculation Results Body Make Analyst Body Model and Year Activity Request No. Body Style CPE SDN WGN VAN Date COMPONENT (PULLEY or SLIDER) Weight T2 (N) Weight T1 (N) Friction Coefficient Calculated Comments AVERAGE FRICTION COEFFICIENT CPE = Coupe SDN = Sedan WGN = Wagon Copyright General Motors Company Provided by IHS under license with General Motors CompanyNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-
