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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,IEEEAbstractD
2、ReverseengineeringofmechanicalpartsrequiresusedtocreateCADmodelsofapartbasedonsenseddataextractionofinformationaboutaninstanceofaparticularpartacquiredusingthree-dimensional(3-D)positiondigitizationsuf?cienttoreplicatethepartusingappropriatemanufactu
3、ringtechniques[1].Part-to-CADreverseengineeringproducestechniques.Thisisimportantinawidevarietyofsituations,sincefunctionalCADmodelsareoftenunavailableorunusablemodelswhichallowuptodateNCfabricationandfacilitateforpartswhichmustbeduplicatedormodi?ed.
4、Computerdesignmodi?cation.Successfulinstancesincludeeverythingvisiontechniquesappliedtothree-dimensional(3-D)dataac-fromsportinggoodstoaircraftparts.quiredusingnoncontact,3-DpositiondigitizershavethepotentialReverseengineeringofsolidobjectstracesitsr
5、ootsbacktoforsigni?cantlyaidingtheprocess.Seriouschallengesmustbethepantograph,whichusesamechanicallinkagetoduplicateovercome,however,ifsuf?cientaccuracyistobeobtainedandifmodelsproducedfromsenseddataaretobetrulyusefulforarbitrarygeometricshapesatany
6、predeterminedscale.Copymanufacturingoperations.Thispaperdescribesaprototypeoflathesandmillsaremorecontemporaryandautomatedver-areverseengineeringsystemwhichusesmanufacturingfeaturessionsofthepantograph.Inacopylathe,amechanicalstylusisasgeometricprimi
7、tives.Thisapproachhastwoadvantagesovermovedalongatemplatespecifyinga1-Dpro?le.Thepositioncurrentpractice.Theresultingmodelscanbedirectlyimportedintofeature-basedCADsystemswithoutlossofthesemanticsandofthecutterisadjustedbasedonthistemplate,producinga
8、topologicalinformationinherentinfeature-basedrepresentations.revoluteobjectwiththesamepro?le.AcopymilltypicallyInaddition,thefeature-basedapproachfacilitatesmethodscapa-movesastylusoverasurface,usingtheheightofthesurfacebleofproducinghighlyaccuratemo
