液压夹具设计手册

液压夹具设计手册思诚机电2GoodFixtureDesignGoodfixturesposition,clampandsupportworkpiecesinthemosteffectivewaypossible3Fixturedesign,workpieceExample14Fixturedesign,process5DatumFixturedesign,workpiecedatums6Fixturedesign,supporting7Fixturedesign,positioning8Fixturedesign,clamping9Fixturedesign,additionalsupportandclamping10Fixture,positioning,supportingandclamping11Fixturedesign,workpiece,Example212Fixturedesign,process13Fixturedesign,supporting14Fixturedesign,clampingXX15Fixturedesign,clampingDatum16Fixturedesign,positioningandclamping17Fixturedesign,positioning,supporting&clamping18FrictionclampingIfclampingusingfrictiononlyitmustberememberedthatthecoefficientoffriction(µ)isnormallycalculatedat0.1ClampingforceFReactionforceTotalclampingforce=FxµClampingforceFReactionforceTotalclampingforce=FClampingforceF@2-30fromhorizontalPreferable19FrictionclampingIfclampingusingfrictiononlyitmustberememberedthatthecoefficientoffriction(µ)isnormallycalculatedat0.1Thiscanbeimprovedonsoftmaterials(eg.Al)iftheclampingpistonhasenoughforcetopenetratetheworkpiece20FixturedesignDEFINITIONOFACLAMPINGFORCETheforceactingonaworkpiecetobeclamped,islargeenoughtoholdtheworkpiecefirmlyinitsgivenpositionrelativetothecuttingtool,againsttheactionofthemachiningforces21FixturedesignCLAMPINGFORCESMechanicallowcost,relativelylowforcesPneumatichighercost,relativelylowforces,largecomponentsHydraulichigherinitialcost,highforces,reliable,smallcomponents22MechanicalForcesMaximumclampingforceusingstandardwrenchClampingforcewithextensionpiecesasshown,500Ntorque,µ=0.123StandardclampingstrapM20threadMax.recommendedtorque223NmMax.clampingforce28kNHydraulicswingclamp6951F-11-21(page63,metriccatalogue)Ø22rod,76mmlongarmMax.oilpressure23MPaClampingforce7.3kNForcecomparison24ForcecomparisonStandardclampingstrapM20threadMax.recommendedtorque223NmMax.clampingforce28kNHydraulicswingclamp6951F-11-21(page63,metriccatalogue)Ø22rod,clampingstrapMax.oilpressure35MPaClampingforce13.7kN25StandardclampingstrapM24threadMax.recommendedtorque383NmMax.clampingforce40kNHydraulicswingclamp6951FN-33-21(page71,metriccatalogue)Ø38rod,clampingstrapMax.oilpressure35MPaClampingforce35kNForcecomparison26StandardclampingstrapM24threadMax.recommendedtorque383NmMax.clampingforce40kNHollowpistoncylinder6921-100x10(page26,metriccatalogue)M24threadMax.oilpressure400barClampingforce101kNForcecomparison27MechanicalorHydraulic?28MechanicalorHydraulic?50MPaSequenceValve47-0440-02(J-3)Setat30MPaCartridgeMountCylinder(x8)42-1010-04(pageF-12)2.5kNeach@50MPaThreadedCylinder42-0010-06(pageF-4)3.4kN@30MPa5.7kN@50MPa29Forcediagram30MPa50MPaSequencevalveopensWorkpiecesMovementofcylinderOilpressure30Component&FixturedesignSENSIBLEUSEOFFORCESensibleintroductionofpositioning,clampingandsupportingforceswillenhancethequalityofaworkpiece31Oilsupplytofixtures2basicmethodsthroughpipesthroughgundrilledchannelsMethoddependsoncosttargetcomplexityoffixtureproductsbeingused32Oilsupplytofixtures,costcomparisonA:ThroughpipesusingflangetypeclampsB:ThroughpipesusingthreadedtypeclampsC:Throughgundrilledchannels&manifoldmountedtypeclampsD:Throughgundrilledchannels&threadedbodytypeclamps33Oilsupplytofixtures,costcomparisonA:ThroughpipesusingflangetypeclampsRelativelyeasytomanufactureFittingsweakestpartofsystemChiptrapsControlfixtureCOST100%34Oilsupplytofixtures,costcomparisonB:ThroughpipesusingthreadedtypeclampsLessswarftrapsReducesmachiningareaFittingsweakestpartofsystemCOST?%againstcontrolfixture35Oilsupplytofixtures,costcomparisonC:Throughgundrilledchannels&manifoldmountedtypeclampsMaximumcomponentdensityMinimumswarftrapsCOST?%againstcontrolfixture36Oilsupplytofixtures,costcomparisonD:Throughgundrilledchannels&threadedbodytypeclampsMaximumcomponentdensityMinimumswarftrapsCOST?%againstcontrolfixture37Oilsupplytofixtures,costcomparisonC:Throughgundrilledchannels&manifoldmountedtypeclamps98%B:130%D:104%A:100%Hydrauliccircuitdesign39Circuitdesign40CamCoverfixtureexample41Circuitdesign1432681079ILMORENGINEERINGLTDQ3/22153DIA10POLYURETHANEDIA10POLYURETHANE1/4BOREHOSE531524101010101010101010101010101012111313190355AIRPREPARATIONSET1290079PUSH/PULLVALVE1396324PRESSURESWITCH14GD63G040-600BARGAUGE1596054QUICKCOUPLING1690041QUICKEXHAUSTVALVE17U-3/8SILENCER18A82208BOOSTER19A96212BLEEDUNIT1101458-001THREADEDBODYCYLINDER15112954-420SEQUENCEVALVE11270009TEEMANIFOLD1131913-010WORKSUPPORT2ITEMPARTNUMBERDESCRIPTIONQTYDIA8x1.5STEELALLDIMENSIONSINMILLIMETRESTHISDOCUMENTISCONFIDENTIALANDISTHEPROPERTYOFACHYDRAULICSLTD.THEDOCUMENTANDANYINFORMATIONTHEREINMAYNOTBEUSED,COPIEDORDISCLOSEDTOANYTHIRDPARTYWITHOUTPRIORWRITTENAUTORISATIONOFACHYDRAULICSLTD.48KENILWORTHDRIVE,OADBYINDUSTRIALESTATE,ACHYDRAULICSLTDACHOADBY,LEICESTER.LE25LGTELEPHONE01162710561DRAWNCHECKEDTITLEISSUEDRGNo.SHEETOFNONE-ORIGINAL1MAC29:5:2000111OCAQUOTECIRCUITFORCAMCOVERFIXTUREIMPORTANTNOTICE1.Theairsupplytothissystemmustbecleanandfreeofwaterandlubricatedwherenecessary.2.Allhydraulicpipeworkandfittingsmustbethoroughlyflushedoutandfreeofswarfbeforefittingtoth