1、WORLDWIDEENGINEERINGSTANDARDSTest Procedure GMW14691Methods of Test for Sound Deadener Pads;Test for Resistance to Heat Copyright 2012 General Motors Company All Rights ReservedOctober 2012 Originating Department: North American Engineering Standards Page 1 of 21 ScopeNote: Nothing in this standard
2、supercedesapplicable laws and regulations.Note: In the event of conflict between the Englishand domestic language, the English language shalltake precedence.1.1 Purpose. This test method shall be used todetermine the resistance to elevated temperaturesof fused deadener pads. The retention of adhesio
3、nto specially prepared steel test panels is used asthe criterion of such resistance.1.2 Foreword. Not applicable.1.3 Applicability. Not applicable.2 ReferencesNote: Only the latest approved standards areapplicable unless otherwise specified.2.1 External Standards/Specifications.None2.2 GM Standards/
4、Specifications.GMW2 GMW32212.3 Additional References.None.3 Resources3.1 Facilities. Not applicable.3.2 Equipment.3.2.1 Test apparatus for conditioning according toGMW3221 Code A.3.2.2 Any forced-air drying oven capable ofmaintaining the specified temperatures within thespecified tolerances as shown
5、 in Figure 1.Figure 1: Tolerances3.3 Test Vehicle/Test Piece. From the availablematerial, test pieces of the dimensions shown inFigure 2 shall be taken at various points.3.3.1 Dimensional tolerances shall be 20 mm;thickness shall be equal to thickness of thedeadener pad. The direction of sampling is
6、unimportant.Figure 2: Test Pieces - DimensionsCopyright 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 GMW14691 Copyright 2012 General Motors Company
7、 All Rights ReservedOctober 2012 Page 2 of 23.3.2 For initial sample approval and arbitrationpurposes, at least three (3) test pieces shall betested. For routine quality control, at least one (1)test piece shall be tested.3.4 Test Time. Not applicable.3.5 Test Required Information. Not applicable.3.
8、6 Personnel/Skills. Not applicable.4 Procedure4.1 Preparation. The test pieces shall beconditioned to GMW3221 Code A.4.2 Conditions.4.2.1 Environmental Conditions. Not applicable.4.2.2 Test Conditions. Deviations from therequirements of this standard shall have beenagreed upon. Such requirements sha
9、ll be specifiedon component drawings, test certificates, reports,etc.4.3 Instructions.4.3.1 The test pieces shall be placed on thespecified pre-treated test panels, baked on, andsubjected to the heat aging specified. After30 minutes cooling at (+23 5) C, the test piecesshall be assessed.4.3.2 Baking
10、 Conditions and Heat AgingConditions. Unless otherwise indicated, thebaking conditions and heat aging conditions inTable 1 shall apply to the test pieces.Table 1: Bake ConditionsBakeDescriptionMinimum(Time at MetalTemperature)Maximum(Time at MetalTemperature)StandardProcess- Paint Shop(Use forMateri
11、al Types1 thru 5)15 minutesat 125 C Note 1(257 F) Note 160 minutesat 190 C Note 2(374 F) Note 2Non-compressed3-Wet Process- Paint Shop(Use forMaterial Types1A thru 5A)3-Wet10 minutesat 140 C(285 F) Note 33-Wet20 minutesat 163 C(325 F) Note 3Note 1: Represents the minimum bake for a Low Bake,Solventb
12、orne Primer Surfacer.Note 2: Represents the maximum bake for a High Bake,Powder Primer Surfacer.Note 3: Represents the minimum/maximum bake for a 3-WetSealer Oven.5 Data5.1 Calculations.5.2 Interpretation of Results. Evaluation shall bemade in compliance with the requirements shownon the relevant dr
13、awing, material specifications,etc. Slip-off of the material from the test panelsshall be evaluated after heat aging.5.3 Test Documentation. With reference to thistest procedure, the test results shall berepresented in a test report.6 SafetyThis standard may involve hazardous materials,operations, a
14、nd equipment. This standard does notpropose to address all the safety problemsassociated with its use. It is the responsibility of theuser of this standard to establish appropriate safetyand health practices and determine theapplicability of regulatory limitations prior to use.7 Notes7.1 Glossary. N
15、ot applicable.7.2 Acronyms, Abbreviations, and Symbols. Notapplicable.8 Coding SystemThis standard shall be referenced in otherdocuments, drawings, etc., as follows:Resistance to Heat to GMW146919 Release and RevisionsThis standard was originated in October 2005. Itwas first approved by the Global M
16、aterials Team inFebruary 2007. It was first published in July 2007.Issue PublicationDate Description (Organization)1 JUL 2007 Initial publication.2 OCT 2012 Five-year refresh GlobalDamper/ Preform SealExpert TeamCopyright General Motors Company Provided by IHS under license with General Motors CompanyNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-
