3d printing opportunity and challenges

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1、IQTQUARTERLY3DPrinting:OPPOrtunitiesAnDchALLengesByEugeneGiller,FrankAzzolino,andTomDavidsonThedevelopmentof3Dsolidmodelingoverthelastthreedecadeshasfacilitatedthedevelopmentof3Dprinting,alsocalledadditivemanufacturing(AM),toreplacetraditionalsubtract

2、iveandmoldingmanufacturingprocessesforprototyping.3Dprintinghasbecomeanintegralpartoftheproductdevelopmentprocess.Thistechnologyhasdrasticallyreducedprototypingcostsanddevelopmenttime.3Dprintingenablesengineersanddesignerstohaveaphysical,andoftenfully

3、functional,mechanicalprototypeafewhoursaftercompletionofthedesign.3Dprintingalsovastlyimprovesthedevelopmentprocessbyenablingrapiddesigniterations.Recently,3Dprintershavefoundmultipleapplicationsreactivematerialtechnologiesinthemanufactureofcustomized

4、products.ForThefirstgroupoftechnologiesusesreactivematerialsexample,almostallin-the-earhearingaidsandcuredbyvariousenergysourcesinordertocreateinvisibleorthodontureareproducedusing3Dprinters.thedesiredphysicalshape.TheoldestandmostInthisarticlewelooka

5、tthedirectionof3DprintingcommonlyusedmethodisStereolithography(SLA),technologyandspecificapplicationsthatwillbenefitinwhichUV-visiblelaserscurelight-sensitiveresintheU.S.IntelligenceCommunity.(photopolymer).Thelasertracesacross-sectionofthemodel,causi

6、nginstantsolidificationoftheliquidmajor3DPrintingtechnologiesphotopolymer.Next,aplatformsupportingthepartAdditivemanufacturingprocessescreate3DpatternsdescendsintoavatofresintodepositadditionalidenticaltothemodelgeneratedwithCADsoftwarebyuncuredphotop

7、olymerontheplatform(Figure1).printingonelayeratatime.ThecurrentcommercialTheprocesscontinueslayerbylayeruntiltheparttechnologiesusedinadditivemanufacturingcanbeiscomplete.dividedintotwocategories.IQTQUARTERLYFALL2012Vol.4No.209IQTQUARTERLYFigure1

8、Sche

9、maticoftheSLAprocessFigure2

10、SchematicoftheFDMprocessCompletedpartsmustbecleanedwithsolventtofashion.ThesurfacefinishforanFDMpartisrelativelyremovehazardousunreactedmaterial.Asupportpoor,andthepartqualitydependsonthediameterofstructureisnecessa