catia曲面快速重建PPT

,1,曲面快速重建QuickSurfaceReconstruction,CATIA逆向工程,2,用户界面,3,数字模型,创建FreeFormsurfaces,拉伸曲面,修剪,一般过程,倒角,4,数字模型,Identifymechanicalfeatures,一般过程（另1）,5,CreateScans,CreateCurves,Processcurves,一般过程(另2),Createsurfaces,6,创建Scans使用曲率分析,Definethecurvatureorradiusvalueorselectapointofthepolygon,Definetheanalysistype,Iso-curvaturedisplay,Real-timedisplayofcurvaturevalueatcursorposition,Thisfunctioncreatesscanscomposedofthepointswherethecurvatureorcurvatureradiusofthepolygonhasagivenvalue,7,创建Scans使用曲率分析(2/3),Defineafilteringvalue,Filteringvaluesetto500,Filteringvaluesetto0,8,创建Scans使用曲率分析(3/3),Splitofthepolygonebytheisocurvaturescans,Creationofisocurvaturescans,9,Usingisoslopecomputation(1/2),Definetheanglevalue,Definethecompassorientation,Thisfunctioncreatesscanscomposedofthepointswherenormaltothepolygonhasagivenanglewiththecompassdirection.,10,Usingisoslopecomputation(2/2),Creationoftheisoslopescan,Splitofthepolygonbytheisoslopescan,11,创建曲线,修整scans创建3D曲线修剪不相交曲线清理轮廓,12,修整scans(1/2),定义精度,Definemanuallysplittingpointsonthescan,Definetheorderofeachcurvesspan,通过修整scan创建曲线,Definethemaximumnumberofspansforeachcurve,Defineasmoothingfactorifnecessary,Defineananglevalueforautomaticsplitting,13,修整scansscans(2/2),Definethecontinuitylevelbetweentwoconsecutivecurves,Removeasplittingpoint,14,Creatinga3Dcurve(1/3),Definecreationoption:,Selectpointsonthecloud,Constraintpointtosnapitonthedigit,Addapoint,Removeapoint,15,Creatinga3Dcurve(2/3),Movethemanipulatortodefinetheconnectionpointifthecurvespointisonanothercurve.,Activatethetangencydefinitionatapoint,16,Creatinga3Dcurve(3/3),Definethetangencydirectionatapointusingthegreencircles,Makethecurvetangenttotheneighbourcurve,17,Trimmingnonintersectingcurves,Selectthecurvestoprocess(Curvesmustnotneedextrapolationtofindanintersection),Definethemaximumdistancebetweentwocurvestoconsideranintersection,Definethemaximumlengthofthecreatedcurves(optional),18,Cleaningcontour,Selectthecurvestoprocess,Imposethefunctiontocreateaclosedcontourifnecessary,Activatethetangencycontinuityconstraint,Definethemaximumangletoactivatethetangencyconstraint,Defineifthecurveisfixedorfree,19,创建曲面,创建规范曲面创建自由曲面,20,创建规范曲面(1/3),Activatetheautomaticmodeforanautomaticrecognitionofacanonicalshape,Informationabouttherecognizefeature,Thisfunctionidentifiesacanonicalsurfacefromasetofdigitizedpoints.,21,创建规范曲面(2/3),Choosetheexpectedcanonicalshapeifthisoneisknown,Defineknowninformationaboutthefeatureifavailable,Definetheorientationofthefeatureifitisaplane,Definethesizeofthefeatureifitisaplane,22,创建规范曲面(3/3),Editthefeatureafteritscreationtokeeponlythenecessarypart,23,创建自由曲面(1/5),Selectpointsonlytotakeadvantageofthefittingcapabilitiesonly,Thisfunctioncombinesthepowerofafillingfunctionandafittingfunction.,Resultconsistsinalargesurfacecoveringtheselectedpoints,24,创建自由曲面(2/5),Selectpointsandboundarycurvestotakeadvantageofbothfittingandfillingcapabilities,Resultconsistsinatrimmedsurfacecoveringtheselectedpoints,Definetheexpectedcontinuitylevelforeachboundarycurve,25,创建自由曲面(3/5),Definemaximumdeviationexpectedbetweenthefinalsurfaceandtheselectedpoints,Definetheboundarycurves,Definethecloudofpoints,Definetheboundaryuse:Constraint:thesurfacehastopassthruthecurvesandistrimmedbythecurvesTrim:thesurfaceiscomputedonlybyfittingthepoints.Boundarycurvesarethenprojectedonthesurfaceandthesurfaceistrimmedbytheprojection.Selection:onlythepointslocatedinsidetheboundarycurveswillbeusedforfitting.Notrimmingoperationwillbeoperatedonthefinalsurface.,26,创建自由曲面(4/5),Defineaninitialisationsurfaceifrequired.Thecreatedsurfacewillrespecttheparametrisationoftheinitsurface.,Activatethedisplayofthedeviationspikesanddefinetheminimumdeviationdisplayed,27,创建自由曲面(5/5),Definethemaximumorderforeachspanofthecreatedsurface,DefinethemaximumnumberofspansforthecreatedsurfaceAskingforonespanwhenfillingafour-sidedareawillproduceasinglepatch.,Definethemaximumdistancebetweenthecreatedsurfaceandtheboundarycurves,D