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1、先進制造技術(shù)英文翻譯文獻2012第一部分3.4RapidPrototypingandManufacturing3.4.1IntroductionManufacturingcommunityisfacingtwoimportantchallengingtasks:·Substantialreductionofproductdevelopmenttime·Improvementonflexibilityformanufacturingsmallbatchsizeproductandavarietyoftypesofproducts
2、.Computer-aideddesignandmanufacturing(CADandCAM)havesignificantlyimprovedthetraditionalproductiondesignandmanufacturing.However,thereareanumberofobstaclesintrueintegrationofcomputer-aideddesignwithcomputer-aidedmanufacturingforrapiddevelopmentofnewproducts.Althoughs
3、ubstantialre-searchhasbeendoneinthepastforcomputer-aideddesignandmanufacturingintegration,suchasfeaturerecognition,CNCprogrammingandprocessplanning,thegapbetweenCADandCAMremainsunfilledinthefollowingaspects:·Rapidcreationof3Dmodelsandprototypes·Cost-effectiveproduct
4、ionofpatternsandmouldswithcomplexsurfaces(1)WhatRPMCanDoTosubstantiallyshortenthetimefordevelopingpatterns,moulds,andprototypes,somemanufacturingenterpriseshavestartedtouserapidproto-typingmethodsforcomplexpatternsmakingandcomponentprototyping.Overthepastfewyearsava
5、rietyofnewrapidmanufacturingtechnologies,generallycalledRapidPrototypingandManufacturing(RPM),haveemerged;thetechnologiesdevelopedincludeStereolithography(SL),SelectiveLaserSintering(SLS),FusedDepositionModeling(FDM),LaminatedObjectManufacturing(LOM),andThreeDimensi
6、onalPrinting(3DPrinting).ThesetechnologiesarecapableofdirectlygeneratingphysicalobjectsfromCADdatabases.Theyhaveacommonimportantfeature:theprototypepartisproducedbyaddingmaterialsratherthanremovingmaterials.Thissimplifiesthe3Dpartproducingprocessesto2Dlayeraddingpro
7、cessessothatapartcanbeproduceddirectlyfromitscomputermodel.(2)TheBasicProcessofRPMApartisfirstmodeledbyageometricmodelersuchasasolidmodeler.Thepartisthenmathematicallysectioned(sliced)intoaseriesofparallelcross-sectionpieces.Foreachpiecethecuringorbindingpathsaregen
8、erated.Thesecuringorbindingpathsaredirectlyusedtoinstructthemachineforproducingthepartbysolidifyingorbindingalineofmaterial.Afteralayerisb
