Feature-Based Reverse Engineering基于特征地逆向工程 机械零件.pdf

Feature-Based Reverse Engineering基于特征地逆向工程 机械零件.pdf

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时间:2020-03-27

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1、IEEETRANSACTIONSONROBOTICSANDAUTOMATION,VOL.15,NO.1,FEBRUARY199957Feature-BasedReverseEngineeringofMechanicalPartsWilliamB.Thompson,SeniorMember,IEEE,JonathanC.Owen,H.JamesdeSt.Germain,StevanR.Stark,Jr.,andThomasC.Henderson,SeniorMember,IEEEAbstractÐ

2、ReverseengineeringofmechanicalpartsrequiresusedtocreateCADmodelsofapartbasedonsenseddataextractionofinformationaboutaninstanceofaparticularpartacquiredusingthree-dimensional(3-D)positiondigitizationsufficienttoreplicatethepartusingappropriatemanufactu

3、ringtechniques[1].Part-to-CADreverseengineeringproducestechniques.Thisisimportantinawidevarietyofsituations,sincefunctionalCADmodelsareoftenunavailableorunusablemodelswhichallowuptodateNCfabricationandfacilitateforpartswhichmustbeduplicatedormodified.

4、Computerdesignmodification.Successfulinstancesincludeeverythingvisiontechniquesappliedtothree-dimensional(3-D)dataac-fromsportinggoodstoaircraftparts.quiredusingnoncontact,3-DpositiondigitizershavethepotentialReverseengineeringofsolidobjectstracesitsr

5、ootsbacktoforsignificantlyaidingtheprocess.Seriouschallengesmustbethepantograph,whichusesamechanicallinkagetoduplicateovercome,however,ifsufficientaccuracyistobeobtainedandifmodelsproducedfromsenseddataaretobetrulyusefulforarbitrarygeometricshapesatany

6、predeterminedscale.Copymanufacturingoperations.Thispaperdescribesaprototypeoflathesandmillsaremorecontemporaryandautomatedver-areverseengineeringsystemwhichusesmanufacturingfeaturessionsofthepantograph.Inacopylathe,amechanicalstylusisasgeometricprimi

7、tives.Thisapproachhastwoadvantagesovermovedalongatemplatespecifyinga1-Dprofile.Thepositioncurrentpractice.Theresultingmodelscanbedirectlyimportedintofeature-basedCADsystemswithoutlossofthesemanticsandofthecutterisadjustedbasedonthistemplate,producinga

8、topologicalinformationinherentinfeature-basedrepresentations.revoluteobjectwiththesameprofile.AcopymilltypicallyInaddition,thefeature-basedapproachfacilitatesmethodscapa-movesastylusoverasurface,usingtheheightofthesurfacebleofproducinghighlyaccuratemo

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