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专业夹具设计全英文介绍.pptVIP

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专业夹具设计全英文介绍思诚机电

GoodFixtureDesignGoodfixturesposition,clampandsupportworkpiecesinthemosteffectivewaypossible

Fixturedesign,workpieceExample1

Fixturedesign,process

Fixturedesign,workpiecedatumsDatum

Fixturedesign,supporting

Fixturedesign,positioning

Fixturedesign,clamping

Fixturedesign,additionalsupportandclamping

Fixture,positioning,supportingandclamping

Fixturedesign,workpiece,Example2

Fixturedesign,process

Fixturedesign,supporting

Fixturedesign,clampingXX

Fixturedesign,clampingDatum

Fixturedesign,positioningandclamping

Fixturedesign,positioning,supportingclamping

FrictionclampingIfclampingusingfrictiononlyitmustberememberedthatthecoefficientoffriction(μ)isnormallycalculatedat0.1ClampingforceFReactionforceTotalclampingforce=FxμClampingforceFReactionforceTotalclampingforce=FClampingforceF@2-30fromhorizontalPreferable

FrictionclampingIfclampingusingfrictiononlyitmustberememberedthatthecoefficientoffriction(μ)isnormallycalculatedat0.1Thiscanbeimprovedonsoftmaterials(eg.Al)iftheclampingpistonhasenoughforcetopenetratetheworkpiece

FixturedesignDEFINITIONOFACLAMPINGFORCETheforceactingonaworkpiecetobeclamped,islargeenoughtoholdtheworkpiecefirmlyinitsgivenpositionrelativetothecuttingtool,againsttheactionofthemachiningforces

FixturedesignCLAMPINGFORCESMechanicallowcost,relativelylowforcesPneumatichighercost,relativelylowforces,largecomponentsHydraulichigherinitialcost,highforces,reliable,smallcomponents

MechanicalForces22MaximumclampingforceusingstandardwrenchClampingforce(kN)Clampingforcewithextensionpiecesasshown,500Ntorque,μ=0.10304050102

Forcecomparison23StandardclampingstrapM20threadMax.recommendedtorque223NmMax.clampingforce28kNHydraulicswingclamp6951F-11-21(page63,metriccatalogue)?22rod,76mmlongarmMax.oilpressure23MPaClampingforce7.3k

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