外文翻译实体自由成型制造与快速原型制造.doc

《外文翻译实体自由成型制造与快速原型制造.doc》由会员上传分享，免费在线阅读，更多相关内容在工程资料-天天文库。

1、SOUDFREEFORMFABRICATIONISFF)ANDRAPIDPROTOTYPING1・1SOUDFREEFORMFABRICATIONISFF)METHODSSeveralmanufacturingprocessesareavailabletomaketheimportanttransitionfromcomputeraideddesign(CAD)toaprototypepart.Severalnewtechnologiesbegantomaketheirappearanceafter1987-Tnthatyear,stereolithography(SLA)wasfirstin

2、troducedbv3DSystemsTnc.,andoverthenextfiveyearsseveralrivalmethodsalsoappeared.T11ScreatedthefamilyofprocessesknownassolidfreeformfabricationfSFFl.Aswithmostnewtechnologiesatthebeginningofthe4bmarketadoptionS.shapedcurves^inChapter2.theSFFdomainiSaccompaniedbyarela.tiveamountofadvertising'liype."SFF

3、processesaresometimesdescribedas：•Partsondemand•Fromarttopart•Desktopmanufacturing•RapidprototypingAtthetimeofthiswriting,stereolithography(SLA),selectivelasersintering(SLS),fuseddepositionmodeling(FDM),andlayeredobjectmodeling(LOM)arebeingusedonaday-to-daybasisbycommercialprototypingcompanies.Theth

4、ree-dimensional(3一D)printingprocessincornstarch,plastic,andceramicsisalsobeingusedcommercially.Themethodsloweronthelistshowpromisebutdonotseemtobeingreatusebythirdpartyprototypinghousestomaketheirdailyincome•Castingisaspecialcase•Itisstillusedtomakeone—of-a—kindprototypes.Furthermore,forbatchrunsint

5、he10to500categoryitisaverycosteffectivemethodtouseonceanoriginalmoldhasbeenmadebyaprocesssuchasstereolithography.Machiningisalsousedtomakeone...ofakindorseveralprototypes.1.1・1SummaryofSFFandRapidPrototypingProcessesIndailycommercialuse：•Stereolithography(SLA)•Selectivelasersintering(SIS)・Laminatedo

6、bjectmodeling(LOM)•Fuseddepositionmodeling(FDM)Moreattheresearchanddevelopment(R&D)stage：•3-Dprintingincornstarch,plastic,orceramic・3-Dprintingwithplasticsfollowedbyplanarizationusingmachining・Solidgroundcuring(similartoSLA)•Shapedepositionmodelingracombinationofadditionandsubtraction)Non-SFF(tradit

7、ional):•Machining・CastingComparisonsdoneintheearly1990sbytheChryslerCorporationrevealedthattheSLAprocesswasaheadofitsrivalnontraditionalprototypingmethodsintermsofcostandaccuracy(thesestudiesexcludeda