中英文文献翻译组合机床与控制设计.docx
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中英文文献翻译组合机床与控制设计.docx
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中英文文献翻译组合机床与控制设计
英语原文:
IntegratedMachineandControlDesign
Abstract—Inthispaper,wedescribeasystematicdesignprocedureforreconfigurablemachinetoolsandtheirassociatedcontrolsystems.Thestartingpointforthedesignisasetofoperationsthatmustbeperformedonagivenpartorpartfamily.Theseoperationsaredecomposedintoasetoffunctionsthatthemachinemustperform
andthe
functions
aremapped
tomachinemodules,eachofwhichhas
anassociated
machine
control
module.
Once
themachine
isconstructedfromasetof
modules,
the
machine
control
modules
are
connected.An
operationsequeneecontrol
module,
user
interface
control
module,
and
mode-switching
logiccompletethecontrol
design.
The
integrationofthemachineandcontroldesignandthereconfigurabilityoftheresulting
machinetoolaredescribedindetail.
I.Introduction
Intoday'sompetitivemarkets,manufacturingsystemsmustquicklyrespondto
changingcustomerdemandsanddiminishingproductlifecycles.Traditionaltransfer
linesaredesignedforhighvolumeproduction,operateinafixedautomationparadigm,andthereforecannotreadilyaccommodatechangesintheproductdesign.Ontheotherhand,conventionalCNC-based“flexiblemanufacturingsystemoffergeneralizedflexibilitybutaregenerallyslowandexpensivesincetheyarenotoptimizedforanyparticularproductorafamilyofproducts.
AneffortattheUniversityofMichiganaimstodevelopthetheoryandenablingtechnologyforreconfigurablemachiningsystems.Insteadofbuildingamachiningsystemfromscratcheachtimeanewpartisneeded,anexistingsystemcanbereconfiguredtoproducethenewpart.Inthispaper,wedescribehowanintegratedmachineandcontroldesignstrategycanresultinmachinetoolswhichcanbequicklyandeasilyconfiguredandreconfigured.
Inordertoprovideexactlythefunctionalityandcapacityneededtoprocessafamilyofparts,RMTsaredesignedaroundagivenfamilyofparts.Givenasetofoperationstobeperformed,RMTscanbeconfiguredbyassemblingappropriatemachinemodules.Eachactivemoduleinthelibraryhasacontrolmoduleassociatedwithit.Asthemechanicalmodulesareassembled,thecontrolmoduleswillbeconnectedandthemachinewillbereadytooperate.Extensiveandtime-consumingspecializedcontrolsystemdesignwillnotberequired.SectionIIdescribeshowthemachineisdesignedfromasetofbasicmachinemodules,
ThisresearchwassupportedinpartbytheNSF-ERCconnectedinawell-definedfashion,andSectionIIIdescribeshowthecontrolissimilarlyassembledfromalibraryofcontrolmodules.ThismodularconstructionofthemachineandcontrolallowsformanylevelsofreconfigurabilityasdescribedinSectionIV.ThepaperconeludeswithadescriptionoffutureworkinSectionV.
II.MachineDesign
OngoingworkonmanufacturingsystemconfigurationattheUniversityof
Michiganaddressestheproblemofstartingfromapart(orpartfamily)descriptionandextractingthemachiningoperationsnecessarytoproducethepart(s).Theoperationsaregroupedaccordingtotoleranee,orderofexecution,anddesiredcycletimeofthesystem,withtheintentionthateachoperation“cluster”canbeproducedonasinglemachinetool.
TheoperationclusterconsideredhereistodrillasetofholesforthecamtowercapsonV6andV8cylinderheadsshowninFigure1.Theinputtothereconfigurablemachine
tooldesignprocedureisthecutterlocationdatageneratedbyaprocessplannerforthisoperationcluster.dataincludespositioninganddrillinginformation.
TheRMTdesignprocedureconsistsofthreemainstages:
taskclarification,moduleselection,andevaluation.Afterabriefliteraturereview,thesethreestageswillbeoutlinedinthissection.
A.Relatedresearch
Sineereconfigurabilityisarelativelynewconceptinmachiningsystems,thereis
little,ifany,publishedliteratureonthedesignofreconfigurablemachinetools.However,modularmachinetoolshavebeenonthemarketforseveralyears,andsomeofthepublishedarticlesonmodularrobots,modularmachinesandassemblydohavesomerel-
evaneetothedesignofreconfigurablemachinetools.Forexample,ShinnoandIto
proposedamethodologyforgeneratingthestructuralconfigurationofmachinetools.
Theydecomposedthemachinetoolstructuresintosimplegeometricforms:
e.g.boxes,cylinders,etc.YanandChen[21],[1]extendedthisworktothemachiningcenterstructuraldesign.[12]adaptedIto'smethodformodularmacbonsynthesisandde
velopedamethodforenumeratingmachinetoolmodules.ParadisandKhosla[15]determinedthemodularassemblyconfigurationwhichisoptimallysuitedtoperformaspecifictask.Onthesystemsfront,Rogers
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- 中英文 文献 翻译 组合 机床 控制 设计
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