螺丝紧固扭力控制

AtlasCopcoToolsWhythreadedfasteners?Whythreadedfasteners?AtlasCopcoToolsTensileLoadvs.ShearTensileLoadvs.ShearLoadLoadShearLoadShearLoadTensileLoadTensileLoadClampingforceAtlasCopcoToolsThisThismustmustbeavoided!beavoided!ShearLoadShearLoadTensileLoadTensileLoadAtlasCopcoToolsMeasuringtheMeasuringthetightemingtightemingWemeasuretheappliedtorqueWeWANTtomeasuretheclampingforceAtlasCopcoToolsTorqueT=TorqueT=FFxxrr2rFTarFTbTa=2FrTb=FrwhichgivesTa=2TbAtlasCopcoToolsRelationshipbetweenappliedTorqueRelationshipbetweenappliedTorqueandresultingClampForceandresultingClampForceFrictioninthethreadsClampForceFrictionunderthebolthead50%10%40%AtlasCopcoToolsRelaxationRelaxationThematerialrelaxesandyourisktolooseclampingforce!TimeAtlasCopcoToolsTorqueAngleSnuglevelTorqueAngleSnuglevelHardJoint30deg(ISO5393)SoftJoint720deg(ISO5393)XNmXNm30deg720degAtlasCopcoToolsHardandSoftjointsHardandSoftjointsTargetMeanShiftTorqueAngleOverShootSnuglevelHardSoftAtlasCopcoToolsMeanShiftcompensationMeanShiftcompensationTorqueTimeorAngleTargettorqueThisdifferencegivesMeanShiftandtheneedforaqualitycontrolstationHardjointSoftjointAtlasCopcoToolsTorqueOKTorqueOKTorqueAngleTorque=OKAtlasCopcoToolsTorqueandAngleOKTorqueandAngleOKTorqueAngleTorque=OKAngle=OKAtlasCopcoToolsTorqueOK,AngleLowTorqueOK,AngleLowTorqueAngleTorque=OKAngle=LowTorque=OKAngle=OKAtlasCopcoToolsTorqueOK,AngleHighTorqueOK,AngleHighTorque=OKAngle=HighTorque=OKAngle=LowTorque=OKAngle=OKTorqueAngleAtlasCopcoToolsStaticTorqueStaticTorquePowerToolOutputTorque(Nm)92949192949292X=92,43σ=1,13StaticTorque(Nm)103106103100100103100X=102,14σ=2,27T(Nm)Time20406080100110120TooloutputStatictorqueTheinitial(static)frictionishigherthanthedynamicAtlasCopcoToolsTheBoltMarkingSystemTheBoltMarkingSystemManufacturerFirstfigure=1/100ofmintensilestress(N/mm2)100*8=800N/mm2Secondfigure=relationbetweentensilestressandyield0,8=80%Multiplythetwofigurestogettheyieldstress800*0,8=640N/mm2AtlasCopcoToolsTensileStress/YieldTensileStress/YieldStressStressStressAngulardisplacementTensilestress100*8=800N/mm2Yieldstress800*0,8=640N/mm275%YieldFailureAtlasCopcoToolsThreadtypes•MMetric•UNFUnifiedfinethreads•UNCUnifiedcoarsethreadsM6=6mmTorquerecommendation(shortexample)Seetablepage9inthecatalougeBoltgradeThread5.88.810.9M30,77Nm1,20Nm1,70NmM66,10Nm9,80Nm14,0NmM1029,0Nm47,0Nm65,0Nm