曲面快速重建.ppt

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