逆向工程技術(shù)在汽車模具開發(fā)及檢測中的應(yīng)用研究.pdf

1、中圉分類號：TP391密級：單位代號學(xué)號上海大學(xué)域工學(xué)碩士學(xué)位論文l題l逆向工程技術(shù)在汽車模具i目l開發(fā)及檢測中的應(yīng)用研究j作者_(dá)一旦一袒垂——學(xué)科專業(yè)坦焦劍遣區(qū)自塾化導(dǎo)師—鞫魯皇一～完成日期20051上海大學(xué)研究生論文用紙ABSTRACT、Ⅳim也edevelopmentandapplicationoftheCAD／CAM／CAEtechnologytheworldautomotiveindustryhasbeingmadegreat

2、progressinrecentyearsThroughthecorporationandcounnunicationwithoverseasautomotivegiants，thedesignandmanufactureabilityofourcountry’SautomotiveindustryhasbeingachievedanewlevelButsomecrucialtechnologyincludinghowtodesigna

3、ndmanufacturethevehicle’ScovetingpartandchassishavestillnotbeenmasteredyetIt’SanimportanttaskforUStoresolvethequestionofhowtorefertothedevelopedcountry’Sadvanceddesignandmanufacturetechnologyhowtospecdupthealterationandu

4、pgradingofourtraditionalequipments，andhowtoimprovethelevelofourcountry’SmanufactureabilityasawholeAsoneofthenewlyadvanceddesigningmethod，ReverseEngineering(RE)isplayingamoreandmoreimportantroleinthedevelopmentof3Dmeasuri

5、ngtechnologyTakingOUrcoun缸y’Scurrentcoveringpartdesignandmanufactureabilityintoaccount，itisnecessaryforUStoimproveOUrabilitySOthatwecarldesignitbyourselvesatlastnlekeypointofthecoveringpartdesignandchassisbasedonREisexac

6、tlycapturingtheobject’StopologyandpreciselymodelingitssurfaceInthisessayI’dliketodiscussseveraldifficultandcrucialtechnologyinmodelingsurfacebasedonREindetail：reconstructmanifoldmeshtocapturetheobject’Stopologyfrompo砒clo

7、ud，repositionthepointcloud，constructthesurfacefromthescarerpointsandtestthecomplicatedsurfacesThemaintasksareasfollows：1、AnalyzingdifferentmeasuremethodsandfocusingontheintroductionoftheworkingtheoryofATOSandprovidingthe

8、cloudpointsofthefrontbumperofaminisizecar(Santana2000)measuredbyit2、Studyingthedataprocessmethodssuchasreducing，smoothing，fillingandrepositioningofthepointcloudwhichisintegratedfrommultipleviewsPresentingareductionalgori

9、thmofpointsby3DnonuniformgridAlsogivingarepositionalgorithmhowtoaccuratelyrepositionacloudbasedonthecrudereposition3、DiscussinghowtoreconstructmanifoldmeshfrompointcloudPresentingaimprovingalgorithmhowtomeshapointcloudOn

10、lythecoordinatevalueofeverypointandnootherinformationsuchasvectorisgiventhealgorithmcouldmeshthePOhatcloudwhichhasmanycomplicatedcharactersMeshsimplificationtechnologyisstudiedindetailAnalgorithmformeshsimplificationwith

11、boundederrorisputforward11埔algorithnlcouldmakethesimplifiedmeshkeepthemostcharacteroforiginalmeshwithgreatcompressratioIntheend，thetwowaystoevaluateerrorsbetweentwomeshesiSstudled4、Discussingtheconceptsofparametercurve／s