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机械外文翻译--机床夹具的分类与构成.doc

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机械外文翻译--机床夹具的分类与构成.doc

Machineclassificationandposefixture1fixtureintheroleofmachiningWorkpiececlampingfixtureisakindofprocessequipment,itiswidelyusedinmechanicalmachiningofthemanufacturingprocess,heattreatment,assembly,weldingandtestingprocesses.Intheuseofmetalcuttingmachinetoolscollectivelyreferredtoasthejigfixture.namodernproductionmachineisanindispensablefixtureoftheprocessequipment,machiningoftheworkpiece,theprocessingrequirementsinordertoensure.Firstofalltotheworkpieceandthemachinetoolrelativetoacorrectposition,andthislocationduringprocessingdoesnotchangetheimpactofexternalforces.Tothisend,duringthepremachining,workpiececlampingmustbegood.TherearetwowaystoclampworkpieceoneisdirectlyclampingtheworkpieceinthemachinetableoronthechuckTheotheristheworkpieceinthefixtureonthefixture.Thefirstmethodusedwhentheworkpiececlamping,thegeneraldesignrequirementshavetopresslinesinthesurfacetodrawthesizeandlocation,clamping,orwhentheneedleiszoneddialindicatortofindisaftertheclamping.Thismethodneedspecialequipment,butlowefficiency,aregenerallyusedforonepieceandsmallbatchproduction.Largequantities,mostlywiththeworkpiececlampingfixture.WiththemeritsoftheworkpiececlampingfixturesareasfollowslGuaranteethestabilityofthemachiningaccuracyofworkpiece.Workpieceswithclampingfixture,theworkpiecerelativetothelocationoftoolandmachinetooltoensuretheaccuracyofthefixturefromthetechnicallevelofworkers,sothatanumberofworkpiecemachiningaccuracyoftheline.2Toimprovelaborproductivity.Workpiececlampingfixturecanfacilitatetheusereasily、rapidly,andtheworkpiecedoesnotneedtofindiscrossed,cansignificantlyreducethesupplementaryworkinghours,toimprovelaborproductivityworkpieceinthefixtureafterthefixturetoimprovetherigidityoftheworkpiece,thuscuttingtheamountofincrease,toimprovelaborproductivitycanusemorepiecesofmultiworkpiececlampingfixture,andtheuseofefficientclampingbodies,tofurtherimprovelaborproductivity.3Toexpandtheuseofmachinetools.Machinetoolsingeneraluseadedicatedmachinetoolfixturecanexpandthescopeoftheprocessandgivefullplaytothepotentialofmachinetoolstoachieveamultimachineuse.Forexample,theuseofadedicatedfixturecanbeeasilyLatheprocessingsmallboxtotheworkpiece.Eveninthelatheoutofoil,areductionofexpensivededicatedmachines,reducingthecost,whichisparticularlyimportantforsmallandmediumsizedfactories.4Toimprovetheoperatorsworkingconditions.Asthepneumatic,hydraulic,electromagneticpowersource,suchastheapplicationinthefixture,ontheonehandtoreducethelaborintensityofworkerstheotherhand,itguaranteesthereliabilityoftheworkpiececlamping,andtoachievetheinterlockingmachine,toavoidaccidents,ensuretheoperatorsafetyandmachinetoolequipment5Toreducecosts.Inmassproductionaftertheuseoffixture,fromstemtoincreaselaborproductivity,lowerleveltechnicalworkers,aswellaslowerscrapandotherreasons,obviouslytoreducetheproductioncosts.Fixturemanufacturingcostsharinginagroupofworkpieces,eachworkpiecetoincreasethecostisveryminimal,farlessthanasaresultofincreasedlaborproductivityandreducecosts.Thegreatervolumeofworkpiece,fixturemadetousehasbecomemoresignificanteconomicbenefits.2FixtureCategory2.1GeneralcharacteristicsofthefixturebyCategoryAccordingtotheproductionindifferenttypesoffixturesinthecommoncharacteristicsofmachinetoolfixturefixturecanbedividedintogeneral,specialfixtures,adjustableclamp,andautomaticlineofmodularfixturefixture,suchaslGeneralFixture.Universalfixturereferstothestructure,sizehasbeenstandardized,andhasacertainuniversalfixture.Thistypeoffixtureadaptable,canbeusedtosetupthescopeofacertainshapeandsizeofvariousparts.2Adedicatedfixture.Thistypeoffixtureisdesignedforaparticularpartoftheprocessingproceduresandthedesignandmanufacture.Relativelystableintheproduct,theproductionoflargerquantities,usedavarietyofspecialfixtures,accesstohigherproductivityandmachiningaccuracy.3Adjustablefixture.Adjustablefixtureforgeneralfixtureandspecialfixtureandthedefectsdevelopedanewkindoffixture.Ofdifferenttypesandsizesoftheworkpiece,simplyadjustorreplacethefixtureattheoriginallocationoftheindividualcomponentsandwillbeusedtoclampcomponents.(4ModularFixture.Modularfixtureisamodularfixture.Standardcomponentsofthemodulewithhighprecisionandresistancetoabrasion,canbeassembledintoavarietyoffixtures.Removablefixtureusedtocleantheassemblyafterthenewfixtureleft.(5Automaticlinefixture.Automaticlineclampgenerallydividedintotwocategoriesfixedtypefixture,whichissimilartoadedicatedfixtureotheraccompanyingafixturefortheuseoftheworkpieceinthefixture,togetherwiththemovement,andautomaticworkpiecealongthelinefromamovetothenextpositionpositionforprocessing.2.2ClassificationbytheuseofmachinetoolsClassificationBytheuseofmachinetoolscanbedividedintolathejigfixtures,millingfixtures,drillingfixtures,hangbedfixture,jiggearmachine,CNCmachinetoolfixture,automaticmachinetoolfixtures,accompaniedbyautomaticline,andotherfixtures,suchasmachinetools.Thisisaspecialfixturedesignoftheclassificationmethodused.Dedicatedfixturedesign,themachinegroup,thetypeandthemainparametershavebeendetermined.Theirdifferenceisthecuttingformingmachinetoolmovements,sotheconnectionfixturewiththemachineindifferentways.Machiningaccuracyoftheirdifferentrequirements.2.3ClampingfixtureaccordingtothepowersourceClampingfixtureaccordingtothepowersourcecanbedividedintomanualfixture,pneumaticfixtures,hydraulicfixtures,gasfixturesbyforce,electromagneticfixture,vacuumfixtures,fixture,suchascentrifugalforce.3thecompositionoffixtureAlthoughthestructureofmachinetoolfixturerange,buttheircomponentscanbesummarizedasthefollowingsections.1Positioningcomponents.Typically,whentheshapeoftheworkpiecedatumpositionestablished,thepositionwillbethebasiccomponentsofthestructureidentified2Clampingdevice.Positioningoftheworkpieceinthefixture,theneedtoclamptheworkpiecebeforeprocessingtoensurethattheworkpieceduringprocessingisnotduetoexternalforceandundermineitsposition.3Thespecificfolder.Fixtureandtheskeletonmatrix,allthecomponentsthroughthefixtureitwillconstituteawhole.4Oftheknifeortheguide.Toolusedtodeterminepositionrelativetothecorrectpositionofcomponents.Oftheknifedevicecommoninmillingfixture.Usedtoadjustthecutterknifeblockpositionbeforemachining.5Toconnectcomponents.Connectedcomponentsinthemachinetoolfixtureistodeterminethecorrectpositiononthecomponent,therefore,candoubleasaspecificfoldertoconnectcomponents.Lathefixtureonthetransitionplate,thepositioningofmillingmachinefixtureonkeycomponentsareconnected.6Otherdevicesorcomponents.Accordingtotheprocessingneeds,somedegreefixturedevicewereusedbymodedevice,thewholedevice,andthebalanceofthetopblockandsoon.Thesecomponentsordevicesspeciallydesignedneed.

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