GMW15147-2007年版本

WORLDWIDEENGINEERINGSTANDARDSTestProcedureChassisGMW151473-AxisRealTimeTesttoInvestigatetheDurabilityofPowertrainMountSubassembliesonBodyFrames/EngineCradlesSubjecttoCyclicLoading©Copyright2007GeneralMotorsCorporationAllRightsReservedJune2007OriginatingDepartment:NorthAmericanEngineeringStandardsPage1of51ScopeNote:Nothinginthestandardsupersedesapplicablelawsandregulations.1.1Purpose.Determinationofcyclicdurabilityofpowertrainmountssubassembliessubjecttotestsiteconditions.1.2Foreword.Notapplicable.1.3Applicability.Powertrainmountsubassembliesonbodyframes/enginecradles.2ReferencesNote:Onlythelatestapprovedstandardsareapplicableunlessotherwisespecified.2.1ExternalStandards/Specifications.ISO1431-12.2GMStandards/Specifications.GMW3286GMW14868GMW3425GMW14872GMW14794GMW152282.3AdditionalReferences.ComponentTechnicalSpecification(CTS)StatementofRequirement(SOR)SubsystemTechnicalSpecification(SSTS)VehicleTechnicalSpecification(VTS)3Resources3.1Facilities.Appropriatetestequipment(e.g.servo-hydraulictestequipmentwiththecorrespondingregulatingandcontroldevices),withwhichthetestsdescribedcanbeundertaken,isnecessaryfortheperformanceofthetestsspecified.Schenck’sInstronStructuralTest(IST)IST8800,labsiteequipmentwithcorrespondingcontrolelectronics,orequivalentsystems,e.g.,fromMTSSystemCorporation,shallbeused.3.1.1Calibration.Allthetestfacilitiesandequipmentshallbeingoodworkingorderandshallhaveavalidcalibrationlabel.3.1.2Alternatives.Alternativetestfacilitiesandequipmentmayalsobeused.However,allmeasuringvariablesasspecifiedinthisspecificationshallbedeterminedcorrectlywithrespecttotheirphysicaldefinition.3.2Equipment.Accordingtotheindicatedtestmethods.3.3TestVehicle/TestPiece.Thetestpiecesshallbepre-treatedifnecessary,e.g.pre-corrosionofaluminumalloycomponentsaccordingtoGMW3286orGMW14872,ozonetreatmentaccordingtoISO1431-1,orasrequiredintheSubsystemTechnicalSpecification(SSTS),StatementofRequirement(SOR)orComponentTechnicalSpecification(CTS).3.4TestTime.Setup:Oneweek.Signalgeneration:Twoweeks.TestTime/Part(ref.twolifecycles):Threeweeks.ActualtesttimewillbedeterminedbyapplicableSSTSreliabilityrequirements(i.e.,samplesizeandlifedurations).3.5TestRequiredInformation.3.5.1LoadIntroductionCoordinatesinX,YandZDirection.Thesecoordinatesshallbestatedonthecomponentdrawingsforthebrackets,supports,etc.asnetworkplancoordinatesorasadimensionalsketch.Thesigndefinitionshallalsobefixedinthesedrawings(see4.3.1).Thecoordinatesusedshallagreewiththeconventionsusedbythedesignandsimulationdepartmentsandthesystemsupplier.3.6Personnel/Skills.Notapplicable.4Procedure4.1Preparation.4.1.1ClampingtheTestPieces.ThePowertrainmounts/housingsshallbeconnectedtothebodyframe/enginecradleinaccordancewiththeassemblyspecification.Dependingonthetask,theelastomermountmaybereplacedbyafixturepart.GMW15147GMWORLDWIDEENGINEERINGSTANDARDS©Copyright2007GeneralMotorsCorporationAllRightsReservedPage2of5June20074.1.2.2Theboltsshallbetightenedwiththeminimumtorquespecified.Thenominaltorqueandtheminimumanglemayonlybeusedfortorque/torqueangleassembly.4.1.1.1Theoriginalclampinggeometryshallbeusedasstatedbytheresponsibledesigndepartment.4.1.1.2Themountfastenersshallbeclampedinsuchawaythatnochangetotheinstalledpositionoccursunderoperatingload.4.1.2.3Thetestrequestorshallbeallowedtospecifysometorqueconditionsotherthanminimum.Maximumtorquecouldrepresentaworsecasescenario.Also,torqueshallbeappliedtotheproperfastener.4.1.1.3Allthetestslistedshallbeundertakenwithoriginalbodysegmentsororiginalenginecradles,asapplicable.Deviationsshallbeagreedwiththeresponsibledesigndepartment.4.1.2.4Thepositionoftheboltsshallbemarkedsothatlooseningortighteningisapparentvisually.4.1.1.4Onlyoriginalcomponentsmaybeusedinvalidationtestsonsub-assemblies.4.1.2.5Todetectrelativemovement,joinedcomponentsshallbemarkedinsuchawaythatthesemovementscanbedetected.4.1.2AssemblyandPreparationoftheTestPieces.Thetestpiecesshallbepreparedinsuchawaythatcracksordamageoccurringinthetestisapparent;e.g.,metalcomponentsshallbepaintedwithgreyorwhitepaintwhichguaranteesthatcrackdetectionissufficientlygood.However,thispaintmaynotpenetrateintojointsurfacesorscrewedconnectionsandmaynotbeappliedtothematingsurfacesofthejoints.4.1.2.6Alltorquedataforscrewfastenersbeforeandafterthetestshallbereported.4.2Conditions.4.2.1EnvironmentalConditions.Notapplicable.4.2.2TestConditions.Deviationsfromtherequirementsoftheprocedureshallbeagreedtobythedesignengineer.Suchrequirementsshallbespecifiedoncomponentdrawings,testcertificates,reports,etc.4.1.2.1Originalboltsorsimilarboltswiththesameheadpositionshallbeusedtoscrewonthetestpieces.Seerelevantdrawingforassemblyinstructions(e.g.,bolts,tighteningtorques).Forvalidationtests,onlytheoriginalboltsshallbeused.4.3Instructions.4.3.1TestSet-up.SeeFigure1andFigure2.1.Testpiece/originalmount.2.ForceintroducedFx.3.ForceintroducedFy.4.ForceintroducedFz.5.Device/adaptationoftestpiece.6.Body/frame.Figure1:ExampleofTestSetupGMWORLDWIDEENGINEERINGSTANDARDSGMW15147©Copyright2007GeneralMotorsCorporationAllRightsReser