Rapid_Prototyping_and_manufacturing[1]

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1、RAPIDPROTOTYPINGANDMANUFACTURINGIntroductionTheterm“rapidprototyping”(RP)isarelativelynewexpressionforthegenerationofthree-dimensionalmodelsmanufacturedwithouttheneedformachiningorproductsdesignedonacomputeraideddesignsystem,thefirstrapidprototypingsystemwasintroducedontotheUSmarketin1988and

2、gavetheengineertheopportunitytoproduce3dimensionalobjectsdirectlyfromComputerAidedDesign(CAD)dateandsucceedinthecost-effectiveproductionofpatternsandmouldswithcomplexsurfaces.Theprincipleadvantagesofusingthistechnologyare:1.Highspeedatwhichthesolidmodelisgenerated.2.Thecomplexityofthemodeldo

3、esnotformanylimitationtoitsproduction.3.Theearlyuseofthesemodelswastoassistthedesignerindeterminingfitnessandform.Italsoprovidedthesalesteamwitha3dimensionalobjecttoshowtoaprospectivecustomer,thisbeingfarbetterthanthetraditionalorthographicdrawingwhichmanypeoplefinddifficulttointerpret.Thebe

4、nefitsofRP:1.Converts3DCADimagesintoaccuratephysicalmodelsatafractionofthecostoftraditionalmethods.2.Improvesdesigncommunicationandhelpseliminatedesignmistakes.3.Reduces“timetomarket”foranewproduct.4.Canbeusedasapowerfulmarketingtoolsincetheprototypecanbeseenratherthanthedrawing.5.Thedevelop

5、mentofthistechnologyhasreachedintomanyofthetraditionalfields,attractingtheinterestofartisanswhoseskillanyknowledgehasledto3-Dobjectsbeinguseddirectlyandindirectlyaspatternsandmodelforsofttooling.6.Productionofmodelsbymachininghasanumberoflimitations.7.Materialremovedduringformingisdifficultt

6、oreclaim.8.Machiningintheformofdrillingturningmillingsparkerosionetc.,islimitedbytheshapesitcanproduce.9.Intheeventofdesignchange,conventionaltoolingsuchaspatterns,coreboxes,dies,jigsetc.,becomeexpensivetoalter，andinmanycases,mayrequirecompletere-manufacture.10.Rapidprototypingdifferswithcon

7、ventionalmanufacturingmethodsbyaddingmateriallayerbylayeruntilthedesiredsharpisachieved,immediatelyreducingoravoidingthelossofmaterial.WhatRPMCANDO?Tosubstantiallyshortenthetimefordevelopingpatterns,moulds,andprototypes,somemanufacturingenterprises