GMW14840Laboratory Test Procedures for Wheel Bearing Reliability

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1、WORLDWIDETestProcedureENGINEERINGGMW14840ChassisSTANDARDSLaboratoryTestProceduresforWheelBearingReliability/Durability2.3AdditionalReferences.1ScopePaperSAE2004-01-1578Note:Nothinginthisstandardsupersedesapplicablelawsandregulations.3ResourcesNote:Intheeventofconflictbetween

2、theEnglish3.1Facilities.Notapplicableanddomesticlanguage,theEnglishlanguageshall3.2Equipment.Thetestequipmentshallbetakeprecedence.capableofaccuratelyapplyingtheenvironmental1.1Purpose.Thisdocumentdescribesasetofandloadingconditionsdescribedinthisdocument.laboratoryprocedure

3、susedforvalidationoftheTheequipmentmustbeabletoapplytheseinputslong-termreliability/durabilityofwheelbearingsatvehicle-specificlevels(forces,etc.)andusedonGeneralMotorspassengervehicles.frequenciesspecifiedseparatelybyGMforeachWheelbearingsuppliersarerequiredtoimplementvehic

4、leprogramorwheelbearingfamily.Alltheirownwrittenproceduresthatareconsistentmeasurementequipmentmustbecapableofwith,andcorrelatedto,thesedescriptions.accuratelymakingthemeasurementsspecified.1.2Foreword.Thisdocumentincludesgeneral3.3TestVehicle/TestPiece.Partsarespecifiedinde

5、scriptionsoflaboratorytestproceduresforthisdocumentfortwotypesofpurposes:(1)forevaluatingSpalling(andotherfatigueandweardeterminingthereliability/durabilityofthebearingsmechanisms),Brinelling(andotherissuesrelatedwhenexposedtospecifiedcustomerusageandtoimpactstrength),andSea

6、lingofpassengerenvironmentalfactors,and(2)additionalnewvehiclewheelbearings.Associatedmeasure-(unexposed)partstobemeasuredoranalyzed,inments,inspections,analysesandmonitoringsomecasesdestructively,ratherthanbeingproceduresarealsogiven.exposedtothedurabilitytestconditions.1.3

7、Applicability.ThisdocumentisapplicableforMeasurementsandanalysesontheseunexposedtestsperformedduringproductdevelopment,bearingsareusedforcomparisonwithpartsthatDesignValidation(DV)andProductValidationhaveundergonethedurabilitytesting.Thepurpose(PV)ofwheelbearingstobeusedonGe

8、neralofthesecomparisonsistoassesspotentialMotorsvehicles.degradationand/orc