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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
