液压夹具设计手册

液压夹具设计手册思诚机电第一页，共八十二页。2GoodFixtureDesignGoodfixturesposition,clampandsupportworkpiecesinthemosteffectivewaypossible第二页，共八十二页。3Fixturedesign,workpieceExample1第三页，共八十二页。4Fixturedesign,process第四页，共八十二页。5DatumFixturedesign,workpiecedatums第五页，共八十二页。6Fixturedesign,supporting第六页，共八十二页。7Fixturedesign,positioning第七页，共八十二页。8Fixturedesign,clamping第八页，共八十二页。9Fixturedesign,additionalsupportandclamping第九页，共八十二页。10Fixture,positioning,supportingandclamping第十页，共八十二页。11Fixturedesign,workpiece,Example2第十一页，共八十二页。12Fixturedesign,process第十二页，共八十二页。13Fixturedesign,supporting第十三页，共八十二页。14Fixturedesign,clampingXX第十四页，共八十二页。15Fixturedesign,clampingDatum第十五页，共八十二页。16Fixturedesign,positioningandclamping第十六页，共八十二页。17Fixturedesign,positioning,supporting&clamping第十七页，共八十二页。18FrictionclampingIfclampingusingfrictiononlyitmustberememberedthatthecoefficientoffriction(µ)isnormallycalculatedat0.1ClampingforceFReactionforceTotalclampingforce=FxµClampingforceFReactionforceTotalclampingforce=FClampingforceF@2-30fromhorizontalPreferable第十八页，共八十二页。19FrictionclampingIfclampingusingfrictiononlyitmustberememberedthatthecoefficientoffriction(µ)isnormallycalculatedat0.1Thiscanbeimprovedonsoftmaterials(eg.Al)iftheclampingpistonhasenoughforcetopenetratetheworkpiece第十九页，共八十二页。20FixturedesignDEFINITIONOFACLAMPINGFORCETheforceactingonaworkpiecetobeclamped,islargeenoughtoholdtheworkpiecefirmlyinitsgivenpositionrelativetothecuttingtool,againsttheactionofthemachiningforces第二十页，共八十二页。21FixturedesignCLAMPINGFORCESMechanicallowcost,relativelylowforcesPneumatichighercost,relativelylowforces,largecomponentsHydraulichigherinitialcost,highforces,reliable,smallcomponents第二十一页，共八十二页。22MechanicalForcesMaximumclampingforceusingstandardwrenchClampingforce(kN)Clampingforcewithextensionpiecesasshown,500Ntorque,µ=0.1第二十二页，共八十二页。23StandardclampingstrapM20threadMax.recommendedtorque223NmMax.clampingforce28kNHydraulicswingclamp6951F-11-21(page63,metriccatalogue)Ø22rod,76mmlongarmMax.oilpressure23MPaClampingforce7.3kNForcecomparison第二十三页，共八十二页。24ForcecomparisonStandardclampingstrapM20threadMax.recommendedtorque223NmMax.clampingforce28kNHydraulicswingclamp6951F-11-21(page63,metriccatalogue)Ø22rod,clampingstrapMax.oilpressure35MPaClampingforce13.7kN第二十四页，共八十二页。25StandardclampingstrapM24threadMax.recommendedtorque383NmMax.clampingforce40kNHydraulicswingclamp6951FN-33-21(page71,metriccatalogue)Ø38rod,clampingstrapMax.oilpressure35MPaClampingforce35kNForcecomparison第二十五页，共八十二页。26StandardclampingstrapM24threadMax.recommendedtorque383NmMax.clampingforce40kNHollowpistoncylinder6921-100x10(page26,metriccatalogue)M24threadMax.oilpressure400barClampingforce101kNForcecomparison第二十六页，共八十二页。27MechanicalorHydraulic?第二十七页，共八十二页。28MechanicalorHydraulic?50MPaSequenceValve47-0440-02(J-3)Setat30MPaCartridgeMountCylinder(x8)42-1010-04(pageF-12)2.5kNeach@50MPaThreadedCylinder42-0010-06(pageF-4)3.4kN@30MPa5.7kN@50MPa第二十八页，共八十二页。29Forcediagram30MPa50MPaSequencevalveopensWorkpiecesMovementofcylinderOilpressure第二十九页，共八十二页。30Component&FixturedesignSENSIBLEUSEOFFORCESensibleintroductionofpositioning,clampingandsupportingforceswillenhancethequalityofaworkpiece第三十页，共八十二页。31Oilsupplytofixtures2basicmethodsthroughpipesthroughgundrilledchannelsMethoddependsoncosttargetcomplexityoffixtureproductsbeingused第三十一页，共八十二页。32Oilsupplytofixtures,costcomparisonA:ThroughpipesusingflangetypeclampsB:ThroughpipesusingthreadedtypeclampsC:Throughgundrilledchannels&manifoldmountedtypeclampsD:Throughgundrilledchannels&threadedbodytypeclamps第三十二页，共八十二页。33Oilsupplytofixtures,costcomparisonA:ThroughpipesusingflangetypeclampsRelativelyeasytomanufactureFittingsweakestpartofsystemChiptrapsControlfixtureCOST100%第三十三页，共八十二页。34Oilsupplytofixtures,costcomparisonB:ThroughpipesusingthreadedtypeclampsLessswarftrapsReducesmachiningareaFittingsweakestpartofsystemCOST?%againstcontrolfixture第三十四页，共八十二页。35Oilsupplytofixtures,costcomparisonC:Throughgundrilledchannels&manifoldmountedtypeclampsMaximumcomponentdensityMinimumswarftrapsCOST?%againstcontrolfixture第三十五页，共八十二页。36Oilsupplytofixtures,costcomparisonD:Throughgundrilledchannels&threadedbodytypeclampsMaximumcomponentdensityMinimumswarftrapsCOST?%againstcontrolfixture第三十六页，共八十二页。37Oilsupplytofixtures,costcomparisonC:Throughgundrilledchannels&manifoldmountedtypeclamps98%B:130%D:104%A:100%第三十七页，共八十二页。Hydrauliccircuitdesign第三十八页，共八十二页。39Circuitdesign第三十九页，共八十二页。40CamCoverfixtureexample第四十页，共八十二页。41Circuitdesign第四十一页，共八十二页。42第四十二页，共八十二页。43Barrelfixtureexample第四十三页，共八十二页。44Circuitdesign第四十四页，共八十二页。45第四十五页，共八十二页。Gettingtheoiltothefixture第四十六页，共八十二页。47Rotary&RotaryValveCouplings第四十七页，共八十二页。48RotaryCouplingsUsedwhenfreepassageofoilisrequiredtobedistributedonrotarytablearrangementsStandardversionsofsingle,twin,fourandsixpassageswith/withoutleakageportMaximumoperatingpressure250/500barWhenspecifyingincludedataonrotationspeed,pressure,temperature,mediaandcycletimeSpecialdesignsavailableonrequest第四十八页，共八十二页。49TwinpassagerotarycouplingUseonrotarytablewithtwosingleactingcylinders第四十九页，共八十二页。50FourpassagerotarycouplingUseonrotarytablewith4singleactingor2doubleactingcylinders第五十页，共八十二页。51SixpassagerotarycouplingUseonrotarytableswithcombinationofupto6oilfeedsie.6s/a,3d/a,2d/a&2s/acylinders第五十一页，共八十二页。52RotaryCouplingcircuitSingleactingcircuitDoubleactingcircuit第五十二页，共八十二页。53Applicationexample第五十三页，共八十二页。54RotaryValveCouplingsUsedonrotarytablearrangementswhenloading/unloadingofstationsisrequiredwhilstmaintainingclampingpressureonremainingstationsVersionsinclude5,6,7,8,9&10stations.Applicationsrequiring2,3or4stationsuse6&8stationswithunusedportsplugged.SpecialdesignsavailableUpto200baranaccumulatorisrecommended,above200baritisessentialduetointernalleakagewithintheoilreturncavityoftheunit第五十四页，共八十二页。55RotaryvalvecouplingfunctionLoadstationUnloadstationRotarycouplingWorkstationClampingcylinder第五十五页，共八十二页。56RotaryValveCouplingcircuitSingleactingDoubleacting第五十六页，共八十二页。57Applicationexample第五十七页，共八十二页。58CouplingunitsQuickdisconnectcouplingsOne-handoperationquickdisconnectCouplingunitsAutomaticcouplingsystemsThreadedcouplingelements第五十八页，共八十二页。59QuickDisconnectCouplingsMaxoperatingpressure500barOnehandoperationAlwaysusedustcapsCouplingunits第五十九页，共八十二页。60CouplingUnitsSingleordoubleactingIntegralaccumulatorandpressuregaugeMulti-couplerunitsavailableCouplingunits&accumulators第六十页，共八十二页。61CouplingSystemsAlwaysuseaccumulatorsonstaticsystems10temperaturedifferencerelatesto10barpressuredifferenceCouplingunits&accumulators第六十一页，共八十二页。62Threadedcouplingelements第六十二页，共八十二页。Breathing第六十三页，共八十二页。64Whatisbreathing?Breathingistheactionofsingleactingcylindersduringthespringreturnpartofthecomponentcycle第六十四页，共八十二页。65WhybreathinghastobemadeExcesspressureorvacuuminthespringareachangesthespringforceswhichleadstomalfunctionFormationofcondensationwaterpromotesrustformationandcanleadtoacompletefailureoftheelementsLeakageofhydraulicsealsmustdrainofftoexteriorwithoutpressureotherwisetherewillbemalfunctionsDustandchipsareretainedbysinteredmetalairfiltersLiquidscanbedrawnthroughthesinteredmetalfilter,thusthebreathingspringareaisreduced,ahigherexcesspressureorvacuumiscausedandthefunctionisimpaired第六十五页，共八十二页。66Whatisbreathing?Whathappensduringbreathing第六十六页，共八十二页。67PrecautionsCoverClampingelementswithoutbreatherportscanbecovered.DuetohighcoolantpressureandflowthisisnotalwayssuccessfulConsiderusingdoubleactingelementswhereverpossible第六十七页，共八十二页。68PrecautionsBreatherhoseConnectionofabreatherhoseisapprovediftheoutletissitedatapointwherenoliquidcanpenetrateEnsurenofluidtrapsinhose第六十八页，共八十二页。69PrecautionsClosedbreathersystemSpringareaisincreasedbyconnectionofadditionalclosedarea.ElectricaldiecastboxesareidealVolumeofadditionalareashouldbe10timesthestrokevolumeofallconnectedcomponents第六十九页，共八十二页。70SystembleedingThesystemmustalwaysbefreefromair第七十页，共八十二页。71ComponentDesignComponentscanbeoffixeddesign第七十一页，共八十二页。72ComponentDesignClampingpointscanbeincorporatedintodesignofcomponent第七十二页，共八十二页。73DesignedforClamping第七十三页，共八十二页。74DesignedforClamping第七十四页，共八十二页。75Inaccessibleclampingpositions第七十五页，共八十二页。76IndirectClamping第七十六页，共八十二页。77FixtureDesignStaticfixtureTombstoneHorizontalmach