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外文翻译--铣床夹具设计特点.doc

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外文翻译--铣床夹具设计特点.doc

MillingfixturedesignfeaturesFirst,themaintypesofmillingmachinefixtureandstructureoftheformMillingfixtureformachiningpartsonthemainplane,groove,keyway,spline,andthegapaswellasfaceshape.Usuallyasaresultofmillingfixturetabletogetherwiththefeedmovement,indifferentwaysaccordingtothefeedmillingfixturecanbedividedintostraightlinefeedtype,feedcircularmodeandrelyonthreetypesoffeedtype.1.LinearfeedtypemillingfixtureThistypeofmillingmachinewiththemost.Fixtureinstalledinthemillingmachinetable,theprocessinginastraightlinewiththefeedtablebywayofmovement.Accordingtotheworkpiecequality,structureandproductionquantitieswillbedesignedasaonepiecefixturepointsmorethantheparallelandmorethanarowfollowedbyclampingofthelinkageapproach,sometimestheuseofsubdegreeinstitutions,bothtoimproveproductionefficiency.2.CircletypemillingmachinefixturefeedCirclefeedmillinginthecaseofnonstoploadingandunloadingtheworkpiece,thegeneralisamultitasking,andinthemillingmachinerotarytableuse.Thisfixtureiscompactandeasytooperate,mobiletimeandauxiliarytimeoverlapishighperformancemillingfixture,foruseinhighvolumeproduction.3.BymoldmillingfixtureThismoduledependsonthemillingmachinewithafixtureusedindedicatedoruniversalmillingmachinesontheprocessingofvariousnoncircularsurface.Ontheroleofmoldistomakeaccesstosupplementarymotorworkpiecetoformaprofilecampaign.Movementbywayofthemainfeedthroughmodecanbedividedintostraightlinemillingmachinefixtureandcircleintothefeedtothetwo.Second,thedesignfeaturesofmillingfixtureAsaresultofmillingandcuttingforcecuttingmoreandmoreintermittentcuttingedge,easyprocessingofvibration,sotheyshouldpayattentiontothedesignofmillingmachinefixtureclampingforcetobesufficientselflockingandantistrokefixtureinstallationtobeaccurateandreliable,thatis,whentheprocessinginstallationandtheproperuseofdirectionalkeysontheknifedevicespecificfolderhavesufficientstiffnessandstability,thestructuremustbereasonable.Asaresultofmillingandcuttingforcecuttingmoreandmoreintermittentcuttingedge,easyprocessingofvibration,sotheyshouldpayattentiontothedesignofmillingmachinefixtureclampingforcetobesufficientselflockingandantistrokefixtureinstallationtobeaccurateandreliable,thatis,whentheprocessinginstallationandtheproperuseofdirectionalkeysontheknifedevicespecificfolderhavesufficientstiffnessandstability,thestructuremustbereasonable.1.DirectionalkeysDirectionalkeyposition,alsoknownaskeys,installedonthebottomoftheverticalslotfixture,generallywithtwo,aninastraightline,thefartherthedistance,thehighertheprecisionoriented,withscrewfasteninginthespecificfolder.Directionalkeysworkwiththemillingmachinewithtableshapedslotinthemachinetoolfixturetodeterminethecorrectpositioncanabsorbpartofthecuttingtorque,reducingtheloadonclampingbolttoincreasethestabilityofthefixture,soflatandsomespecialdrillingjigboringmachinefixtureisalsofrequentlyused.Directionalkeysarerectangularandroundtwo.2.OftheknifedeviceDevicesontheknifeblockandknifebythesideofthefootofthefixtureandtoolusedtodeterminetherelativeposition.Thestructureoftheformofaknifedependsontheshapeofthesurfaceprocessing.Directionalhighprecisionfixtureshouldnotbeusedorheavydirectionalkeys,butinthespecificfolderononeelongatedsideprocessingasabasetolookforistheinstallationlocationcalibrationfixture.Knifeblockonthepinandscrewfastenercommonlyusedinthespecificfolder,itslocationshouldbeeasytouseplugfootontheknife,withoutprejudicetotheworkpieceloadingandunloading.Ontheknifewhentheknifecutterblockwithapluginbetweenthefeetwiththeknifetooltoavoiddirectcontactblockorcausedamagetotheknifebladeblockprematurewear.CypriotCypriotfeetareflatfeetandtwofootcylindricalplug,thethicknessanddiameterof35mm,manufacturingtoleranceh6.Sideoftheknifeblockandfeethavebeenstandardizedthedesigncanbefoundintherelevantmanual,usethetotalfixtureSedatmapscaleshouldbemarkedontheknifeblocksizeandtheworksurfaceandpositioningthelocationbetweenthecomponents.Devicesshouldbeinstalledonthebladeoftheknifeandiseasytocutoneendoftheworkpiece.3.FolderspecificdesignToimprovethemillingfixtureinstalledinthemachinetoolstability,reduceitsintermittentcuttingmaybecausedbyvibration,notonlyinthespecificfolderhavesufficientstiffnessandstrength,theirheightandwidthratioshouldalsobeappropriate,ageneralH/B≤11.25,inordertoreducethefixturecenterofgravity,sothatascloseaspossibletotheworkpiecesurfacecountertops.Inaddition,wemustsetareasonableandearblockstostrengthenthetendons.Ifthefolderspecificwide,canbesetupinthesamesideoftwoTslotmillingmachinetableequidistantbetweentheearsBlockofheavydutymillingfixtures,specificfoldersshouldalsobesetupatbothendsoftherings,suchasliftingholesortocarry.Inthemillingprocess,theofteninstalledinthemillingfixturetable,togetherwiththejigwiththeworkpiecefeedtableformovement.Inthemillingprocess,theofteninstalledinthemillingfixturetable,togetherwiththejigwiththeworkpiecefeedtableformovement.Accordingtotheworkpiecefeedmeansofgeneralmillingfixturecanbedividedintothefollowingtwotypes1.Linearfeedtypemillingfixture。Inthemillingprocess,theofteninstalledinthemillingfixturetable,togetherwiththejigwiththeworkpiecefeedtableformovement.2.Circlefeedmillingfixture.Suchfixturesarecommonlyusedinthemillingmachinewithrotarytable,theworkpiecetable,togetherwiththefixturewiththecontinuous,slowmovementoftherotaryfeed,noparkingwillbeloadingandunloadingtheworkpiece.Accordingtotheprocessingrequirementsofthetwocutterheadcanalsoberoughatthesametime,finishingMillingisaflat,keyway,gearandavarietyofformingsurfaceprocessingmethodscommonlyused.Processingtheworkpieceinthemillingmachine,thegeneraladoptionofthefollowingtypesofclampingmethods1directlyinthemillingmachinetableclampingalargeworkpiececlampingoftendirectlyinthetable,withstud,platecompactor,whichneedtodialindicatormethods,toolssuchaszonedtofindtheneedlesurfaceandthecutterisprocessingrelativeposition.2viceflattoolusedforclampingtheworkpieceintheshapeofasimple,smallparts,generalmachinetoolscanbeusedinclampingviceinthemouth,theneedtoensurethatwhenusedinmachinevicethecorrectposition.3dividingheadwiththeworkpiececlamping,theneedforindexingoftheworkpiece,thegeneraldirectclampingheadinthesubdegrees.Inaddition,indexingoftheworkpiecewithoutdividingheadwithclampingprocessingisalsoveryconvenient.4withVshapedframeworkpiececlampingmethodisgenerallyapplicabletoshaftparts,inadditiontohavingabetterthanneutral,butalsotobearagreatercuttingforce.铣床夹具设计特点一、铣床夹具的主要类型及结构形式铣床夹具主要用于加工零件上的平面、凹槽、键槽、花键、缺口及各种成形面。由于铣削加工通常是夹具随工作台一起作进给运动,按进给方式不同铣床夹具可分为直线进给式、圆周进给式和靠模进给式三种类型。1.直线进给式铣床夹具这类铣床用得最多。夹具安装在铣床工作台上,加工中随工作台按直线进给方式运动。根据工件质量、结构及生产批量,将夹具设计成单件多点、多件平行和多件连续依次夹紧的联动方式,有时还要采用分度机构,均为了提高生产效率。2.圆周进给式铣床夹具圆周进给铣削方式在不停车的情况下装卸工件,一般是多工位,在有回转工作台的铣床上使用。这种夹具结构紧凑,操作方便,机动时间与辅助时间重叠,是高效铣床夹具,使用于大批量生产。3.靠模铣床夹具这种带有靠模的铣床夹具用在专用或通用铣床上加工各种非圆曲面。靠模的作用是使工件获得辅助运动,形成仿形运动。按主进给运动方式,靠模铣床夹具可分为直线进给和圆周进给两种。二、铣床夹具的设计要点由于铣削加工切削用量及切削力较大,又是多刃断续切削,加工时易产生振动,因此设计铣床夹具时应注意夹紧力要足够且反行程自锁夹具的安装要准确可靠,即安装及加工时要正确使用定向键、对刀装置夹具体要有足够的刚度和稳定性,结构要合理。1.定向键

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