GMW14995-2019

WheelFastenerTorqueTensionTest-Reuse/Abuse

车轮紧固件扭矩张力测试——重复使用/滥用共17页第1页

通用标准-测试程序

1、Introduction

Note:Nothinginthisstandardsupercedesapplicablelawsandregulations.

Note:IntheeventofconflictbetweentheEnglishanddomesticlanguage,theEnglishlanguageshalltakeprecedence.

1.1Purpose.

1.1.1Test1.TorqueTensionReuse(TTR)istestedtodeterminethedynamictorque/tensioncharacteristicsofthethreaded

fastenerjointforin-servicewheelattachments.Thisprocedurebeginswithnewcomponents(wheels,nuts,andstuds)and

performstighteningiterationsperthespecifiedschedule.

1.1.2Test2:TorqueTensionReuseAbuse(TTRA)istestedtounderstandthepotentialperformanceinthefieldofajointthatis

overtightened.ThistestisperformedwiththesameprocessasTorqueTensionReuseexceptthatTTRAistestedat60Nmover

thespecifiedservicetorque.

1.2Applicability.Unlessotherwisespecified,thisprocedureappliestoin-servicewheelattachmenttighteningvents.Thisstandard

doesnotapplytopulseorimpacttools.Unlessotherwisespecified,anyrequirementsordirectionprovidedinthetestrequest

documentationwillsupercedethistestprocedure.

1.2.1RoadWheels.Thetotalnumberoftighteningiterationsshallbetwenty-five(25).Theinitialrundownofjointsistousenew

threadedfastenerswithnewthreadandbearingsurfacesandnewclampedmembers,andthenapplytwenty-four(24)additional

rundownsonthesamecomponents.

1.2.2CompactTemporaryUseSpareWheels.Thetotalnumberoftighteningiterationsshallbeten(10).Theinitialrundownof

Jointsistousenewthreadedfastenerswithnewthrea