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外文翻译--组合机床与控制设计.doc

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外文翻译--组合机床与控制设计.doc

英语原文INTEGRATEDMACHINEANDCONTROLDESIGNABSTRACTINTHISPAPER,WEDESCRIBEASYSTEMATICDESIGNPROCEDUREFORRECONFIGURABLEMACHINETOOLSANDTHEIRASSOCIATEDCONTROLSYSTEMSTHESTARTINGPOINTFORTHEDESIGNISASETOFOPERATIONSTHATMUSTBEPERFORMEDONAGIVENPARTORPARTFAMILYTHESEOPERATIONSAREDECOMPOSEDINTOASETOFFUNCTIONSTHATTHEMACHINEMUSTPERFORMANDTHEFUNCTIONSAREMAPPEDTOMACHINEMODULES,EACHOFWHICHHASANASSOCIATEDMACHINECONTROLMODULEONCETHEMACHINEISCONSTRUCTEDFROMASETOFMODULES,THEMACHINECONTROLMODULESARECONNECTEDANOPERATIONSEQUENCECONTROLMODULE,USERINTERFACECONTROLMODULE,ANDMODESWITCHINGLOGICCOMPLETETHECONTROLDESIGNTHEINTEGRATIONOFTHEMACHINEANDCONTROLDESIGNANDTHERECONFIGURABILITYOFTHERESULTINGMACHINETOOLAREDESCRIBEDINDETAILIINTRODUCTIONINTODAY’SCOMPETITIVEMARKETS,MANUFACTURINGSYSTEMSMUSTQUICKLYRESPONDTOCHANGINGCUSTOMERDEMANDSANDDIMINISHINGPRODUCTLIFECYCLESTRADITIONALTRANSFERLINESAREDESIGNEDFORHIGHVOLUMEPRODUCTION,OPERATEINAFIXEDAUTOMATIONPARADIGM,ANDTHEREFORECANNOTREADILYACCOMMODATECHANGESINTHEPRODUCTDESIGNONTHEOTHERHAND,CONVENTIONALCNCBASED“FLEXIBLE”MANUFACTURINGSYSTEMOFFERGENERALIZEDFLEXIBILITYBUTAREGENERALLYSLOWANDEXPENSIVESINCETHEYARENOTOPTIMIZEDFORANYPARTICULARPRODUCTORAFAMILYOFPRODUCTSANEFFORTATTHEUNIVERSITYOFMICHIGANAIMSTODEVELOPTHETHEORYANDENABLINGTECHNOLOGYFORRECONFIGURABLEMACHININGSYSTEMSINSTEADOFBUILDINGAMACHININGSYSTEMFROMSCRATCHEACHTIMEANEWPARTISNEEDED,ANEXISTINGSYSTEMCANBERECONFIGUREDTOPRODUCETHENEWPARTINTHISPAPER,WEDESCRIBEHOWANINTEGRATEDMACHINEANDCONTROLDESIGNSTRATEGYCANRESULTINMACHINETOOLSWHICHCANBEQUICKLYANDEASILYCONFIGUREDANDRECONFIGUREDINORDERTOPROVIDEEXACTLYTHEFUNCTIONALITYANDCAPACITYNEEDEDTOPROCESSAFAMILYOFPARTS,RMTSAREDESIGNEDAROUNDAGIVENFAMILYOFPARTSGIVENASETOFOPERATIONSTOBEPERFORMED,RMTSCANBECONFIGUREDBYASSEMBLINGAPPROPRIATEMACHINEMODULESEACHACTIVEMODULEINTHELIBRARYHASACONTROLMODULEASSOCIATEDWITHITASTHEMECHANICALMODULESAREASSEMBLED,THECONTROLMODULESWILLBECONNECTEDANDTHEMACHINEWILLBEREADYTOOPERATEEXTENSIVEANDTIMECONSUMINGSPECIALIZEDCONTROLSYSTEMDESIGNWILLNOTBEREQUIREDSECTIONIIDESCRIBESHOWTHEMACHINEISDESIGNEDFROMASETOFBASICMACHINEMODULES,THISRESEARCHWASSUPPORTEDINPARTBYTHENSFERCCONNECTEDINAWELLDEFINEDFASHION,ANDSECTIONIIIDESCRIBESHOWTHECONTROLISSIMILARLYASSEMBLEDFROMALIBRARYOFCONTROLMODULESTHISMODULARCONSTRUCTIONOFTHEMACHINEANDCONTROLALLOWSFORMANYLEVELSOFRECONFIGURABILITYASDESCRIBEDINSECTIONIVTHEPAPERCONCLUDESWITHADESCRIPTIONOFFUTUREWORKINSECTIONVIIMACHINEDESIGNONGOINGWORKONMANUFACTURINGSYSTEMCONFIGURATIONATTHEUNIVERSITYOFMICHIGANADDRESSESTHEPROBLEMOFSTARTINGFROMAPARTORPARTFAMILYDESCRIPTIONANDEXTRACTINGTHEMACHININGOPERATIONSNECESSARYTOPRODUCETHEPARTSTHEOPERATIONSAREGROUPEDACCORDINGTOTOLERANCE,ORDEROFEXECUTION,ANDDESIREDCYCLETIMEOFTHESYSTEM,WITHTHEINTENTIONTHATEACHOPERATION“CLUSTER”CANBEPRODUCEDONASINGLEMACHINETOOLTHEOPERATIONCLUSTERCONSIDEREDHEREISTODRILLASETOFHOLESFORTHECAMTOWERCAPSONV6ANDV8CYLINDERHEADSSHOWNINFIGURE1THEINPUTTOTHERECONFIGURABLEMACHINETOOLDESIGNPROCEDUREISTHECUTTERLOCATIONDATAGENERATEDBYAPROCESSPLANNERFORTHISOPERATIONCLUSTERDATAINCLUDESPOSITIONINGANDDRILLINGINFORMATIONTHERMTDESIGNPROCEDURECONSISTSOFTHREEMAINSTAGESTASKCLARIFICATION,MODULESELECTION,ANDEVALUATIONAFTERABRIEFLITERATUREREVIEW,THESETHREESTAGESWILLBEOUTLINEDINTHISSECTIONARELATEDRESEARCHSINCERECONFIGURABILITYISARELATIVELYNEWCONCEPTINMACHININGSYSTEMS,THEREISLITTLE,IFANY,PUBLISHEDLITERATUREONTHEDESIGNOFRECONFIGURABLEMACHINETOOLSHOWEVER,MODULARMACHINETOOLSHAVEBEENONTHEMARKETFORSEVERALYEARS,ANDSOMEOFTHEPUBLISHEDARTICLESONMODULARROBOTS,MODULARMACHINESANDASSEMBLYDOHAVESOMERELEVANCETOTHEDESIGNOFRECONFIGURABLEMACHINETOOLSFOREXAMPLE,SHINNOANDITOPROPOSEDAMETHODOLOGYFORGENERATINGTHESTRUCTURALCONFIGURATIONOFMACHINETOOLSTHEYDECOMPOSEDTHEMACHINETOOLSTRUCTURESINTOSIMPLEGEOMETRICFORMSEGBOXES,CYLINDERS,ETCYANANDCHEN21,1EXTENDEDTHISWORKTOTHEMACHININGCENTERSTRUCTURALDESIGN12ADAPTEDITO’SMETHODFORMODULARMACHINETOOLSYNTHESISANDDEVELOPEDAMETHODFORENUMERATINGMACHINETOOLMODULESPARADISANDKHOSLA15DETERMINEDTHEMODULARASSEMBLYCONFIGURATIONWHICHISOPTIMALLYSUITEDTOPERFORMASPECIFICTASKONTHESYSTEMSFRONT,ROGERSANDBOTTACI16DISCUSSEDTHESIGNIFICANCEOFRECONFIGURABLEMANUFACTURINGSYSTEMS,ANDOWENETAL13DEVELOPEDAMODULARRECONFIGURABLEMANUFACTURINGSYSTEMSYNTHESISPROGRAMFOREDUCATIONALPURPOSESINOURWORK,TRADITIONALMETHODSOFMOTIONREPRESENTATIONANDTOPOLOGYIESCREWTHEORY,GRAPHTHEORY,ETCAREEMPLOYEDTOCAPTURETHECHARACTERISTICSOFRMTSTHESEMATHEMATICALSCHEMESAREUSEDFORTOPOLOGICALSYNTHESIS,FUNCTIONDECOMPOSITION,ANDMAPPINGPROCEDURES;DETAILSCANBEFOUNDIN9FIGURE1BTASKCLARIFICATIONTHEDESIGNOFANRMTBEGINSWITHTASKCLARIFICATION,WHICHENTAILSANALYZINGTHECUTTERLOCATIONDATATODETERMINETHESETOFFUNCTIONSWHICHARENECESSARYTOACCOMPLISHTHEDESIREDKINEMATICMOTIONSTHEREARETHREESTEPSFIRST,GRAPHSAREGENERATEDWHICHABSTRACTLYREPRESENTATIONPOSITIONFEEDSPINDLECOOLANTT1T2T3T4T5T6T7T8FIG3HIGHLEVELOPERATIONSEQUENCE,SHOWINGCAUSALDEPENDENCIESANDCONCURRENCIESTHISABSTRACTREPRESENTATIONOFTHESEQUENCEOFOPERATIONSISDERIVEDFROMTHECLDATA,ANDWILLBEUSEDTODESIGNTHESEQUENCINGCONTROLTHEMOTIONSTHESEGRAPHSARETHENDECOMPOSEDINTOFUNCTIONS,ANDFINALLYTHEFUNCTIONSAREMAPPEDONTOMACHINEMODULESWHICHEXISTINTHELIBRARYAGRAPHREPRESENTATIONOFTHEMACHINETOOLSTRUCTUREALLOWSFORSYSTEMATICENUMERATIONOFALTERNATECONFIGURATIONSANDALSOPROVIDESAMETHODOFIDENTIFICATIONOFNONISOMORPHICGRAPHSTHEGRAPHREPRESENTATIONISALSOUSEDFORBOOKKEEPINGTOASSIGNMACHINEMODULESTOTHEGRAPHELEMENTSAGRAPHCONSISTSOFASETOFVERTICESCONNECTEDTOGETHERBYEDGESINUSINGAGRAPHASANABSTRACTREPRESENTATIONOFAMACHINETOOLSTRUCTURE,WEDEFINETWODIFFERENTTYPESOFVERTICESTYPE0ANDTYPE1AVERTEXREPRESENTSAPHYSICALOBJECTWITHTWOPORTS;EACHPORTREPRESENTSTHELOCATIONONTHEOBJECTWHEREITCANBEATTACHEDTOANEIGHBORINGOBJECTATYPE0VERTEXHASINPUTANDOUTPUTPORTSTHATAREINLINEWITHRESPECTTOEACHOTHER,WHEREASATYPE1VERTEXHASINPUTANDOUTPUTPORTSTHATAREPERPENDICULARTOEACHOTHERMACHININGTASKSAREALSOCLASSIFIEDASTYPE0ORTYPE1,DEPENDINGONWHETHERTHETOOLISPARALLELORPERPENDICULARTOTHEWORKPIECECMODULESELECTIONCOMMERCIALLYAVAILABLEMODULESARESELECTEDFROMTHEMODULELIBRARYFOREACHOFTHEFUNCTIONSSTRUCTURALASWELLASKINEMATICTHATWEREMAPPEDTOTHEGRAPHINTHETASKCLARIFICATIONSTAGETHEDATASTOREDFOREACHMODULEINTHELIBRARYINCLUDESTHEHOMOGENOUSTRANSFORMATIONMATRIXREPRESENTINGITSKINEMATICORSTRUCTURALFUNCTION,THETWISTVECTORSUPPLEMENTEDBYRANGEOFMOTIONINFORMATION,ACOMPLIANCEMATRIXREPRESENTINGTHEMODULESTIFFNESS,MODULECONNECTIVITYINFORMATION,ANDPOWERREQUIREMENTSFORACTIVEMODULESSUCHASSPINDLESANDSLIDESTHEFIRSTSTEPINMODULESELECTIONISTOCOMPARETHEHOMOGENEOUSTRANSFORMATIONMATRICESOFTHEMODULESWITHTHETASKREQUIREMENTMATRIXSUCHTHATWHENAPPROPRIATEMODULESARESELECTEDTOMEETTHETASKREQUIREMENTS,THEPRODUCTOFALLMODULEMATRICESSHOULDBEEQUALTOTHEDESIREDTASKMATRIXTT1T2TNAGAIN,THEREMAYBEMANYPOSSIBLECHOICESOFMODULESFORAGIVENSTRUCTURALCONFIGURATIONFIGURE6SHOWSHOWDIFFERENTSLIDES,SPINDLES,ANDSTRUCTURALELEMENTSCANBEASSEMBLEDACCORDINGTOTHEGRAPHOFFIGURE4ASLIDEMODULE,WITHITSCADMODELANDTRANSFORMATIONMATRIX,ISSHOWNINFIGURE7ITISCAPABLEOFONEDIRECTIONOFLINEARMOTION,INDICATEDBYTHE1VARIABLEINITSTRANSFORMATIONMATRIXITSDATABASEENTRY,SHOWNINTABLEI,STORESNOTONLYITSTRANSFORMATIONMATRIXBUTALSOTHEMANUFACTURERNAME,MODELNUMBER,INITIALPOSITION,POWERLEVEL,ANDMOTIONDATATHETWISTVECTORISAUGMENTEDBYINFORMATIONONTHEMINIMUM,INITIAL,ANDMAXIMUMDISPLACEMENTOFTHEMODULETABLEIDATABASEINFORMATIONANDDOCUMENTATIONFORTHEMACHINEMODULESHOWNINFIGURE7MANUFACTURERSUHNERMODELNAMEUA35ACINITIALPOSITION10002010036600110040001577TWISTVECTOR000010TRANGEOFMOTION1550155MAXFORCE5500NCOMPLIANCEMATRIX,ETCPOWERREQUIREMENTS,CONNECTIVITYINFORMATION,

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