ptc官方的Top-Down设计资料ppt

Top-DownDesignToolsManagingComplexAssembliesVictorRemmersHollandEngineeringConsultantsBVTips&Techniques©2006PTC2Top-DownDesignPhilosophy©2006PTC3TraditionalDesignApproach“Bottom-UpDesign”DesignofindividualcomponentsindependentoftheassemblyManualapproachtoensurethatcomponentsfitproperlyandmeetthedesigncriteriaComponentsandthoseplacedinsub-assembliesarebroughttogethertodevelopthetop-levelassemblyErrorsaremanuallyidentifiedandmodificationstoeachcomponentaremadetomaketheadjustment.Asassemblygrows,detectingtheseinconsistenciesandcorrectingthemcanconsumeaconsiderableamountoftimeTopLevelAssemblyComponentDesignComponentDesignComponentDesign©2006PTC4PossibleexampleBottomUp?Mate©2006PTC5Top-DownDesignPhilosophy“Top-DownDesign”Methodofplacingcriticalinformationinahigh-levellocationCommunicatingthatinformationtothelowerlevelsoftheproductstructureCapturingtheoveralldesigninformationinonecentralizedlocationDesignInformationComponentComponentComponent©2006PTC6Amoreintegratedapproach….©2006PTC7TopDownDesignStages–Itisaconcept.6-StageProcess1.ConceptualEngineeringPhaseLayoutsandEngineeringNotebook2.PreliminaryProductStructurePhasePro/INTRALINK,ModelTree3.CapturingDesignIntentPhaseSkeletonModels4.ManageInterdependenciesPhaseReferenceViewer&ReferenceGraph5.CommunicationofDesignIntentPhaseCopyGeoms,PublishGeoms&Shrinkwrap6.PopulationoftheAssemblyPhaseAutomaticComponentConstraints&ComponentInterfaces©2006PTC8TheBobcatexample©2006PTC9ConceptualEngineeringPhaseLayoutsandEngineeringNotebookUnderstandExistingSituationHigh-levelRequirementsSpaceAllocationDefineNewSpaceandMotion2DSketches3DModelsRapidIteration&ConvergenceAnimationsCaptureKeyDesignIntentParametersNotesSpreadsheetsProprietaryDataStage1©2006PTC10PreliminaryProductStructurePhasePro/INTRALINK,ModelTreeQuicklydefineproducthierarchy•Beforeanyofthecomponents’geometryisdefinedIntuitive,automaticmappingto“startmodels”•Templatesensurealldesignssharethenecessarycommonelementssuchaslayers,views¶metersFoundationforefficienttaskdistributionAssemblyPopulationEnvironments•Pro/EmenusandModelTreepop-upmenus•Pro/INTRALINKandPDMLinkComponentCreationMethods•EmptyComponents;Copyfromstartmodels•Automaticassemblyofdefaultdatums•Unplaced,Partially-&Over-ConstrainedComponentsStage2©2006PTC11CapturingDesignIntentPhaseSkeletonModelsWhatneedstohappen?CaptureconceptualdesignparameterswithinthecontextoftheassemblyCapture&controlcriticalobjectinterfacesinasingle,convenientlocationHow?SkeletonModels…CentralizedpathwayforcommunicationFacilitatetaskdistributionPromotewell-organizeddesignenvironmentsEnablefaster,moreefficientpropagationofchangeSpecialTreatmentinBOMs,SimplifiedReps,Drawings,ModelTree&MassPropertyCalculationsUniquelysupportedScopeControlSettingStage3©2006PTC12ManageInterdependenciesPhaseReferenceViewer&ReferenceGraphStage4ToolstoManageReferencesExternalReferenceControl•EnsuresTop-DownDesignmethodologyisfollowed•Incorporatedesignmanagementrulesdirectlyintothedesign•EnsuresproperdesignreusePro/INTRALINKModelTreeGlobalReferenceViewerReferenceGraph©2006PTC13CommunicationofDesignIntentPhasePublishGeoms,CopyGeoms&InheritancePublishGeometryFeaturesProvidesabilitytopre-determinethegeometrytobereferencedbyaCopyGeometryfeatureAllowsdesignerstodefinetheirinterfacestotherestofthedesignCopyGeometryFeaturesAllowscopyingofalltypesofgeometrySurfaces,edges,curves,datums,quilts,copy/publishgeometryRetainscopiedgeometrynameandlayersettingsDependencyonparentgeometrycanbetoggledCanbe“Externalized”ExternalCopyGeometryBuildrelationshipsonexternalmodelsindependentofanassemblyUsefulforcoordinatesystemassemblypracticesInheritance–Inheritmodelgeometryforone-wayassociativityShrinkwrap(includedinFoundationAdvantagePackage)Stage5©2006PTC14PopulationoftheAssemblyPhaseAutomaticComponentConstraints&ComponentInterfacesStage6Whattoolsareavailableforpopulatingtheassembly?AssemblyTools•Drag&DropPlacement•ComponentInterfacesComponentCreation•Withinthecontextoftheassembly•MirrorPartsorSubassemblies©2006PTC15HowdoesTopDownDesignrelatetocompanygoals?FourGoalsfromUpperManagement1)CycleTimeReduction.2)IncreaseUserSatisfactionwithSoftware.3)MarginIncrease.4)CostReduction.©2006PTC16Whyshouldyouuseit?Benefits:ReduceddesigntimeReducederrors(rightthefirsttime)IncreasedqualityBetterprojectmanagementvisibilityConcurrentengineeringConfidenceintop-levelregenerationKnowledgeofhowmodulesinterfaceTop-levelchangecontrol©2006PTC17Example:todesignanalternator...Whatinformationshouldadesignerneedtoworkwithmosttimes?CompleteTop-LevelAssembly540MBAllSkeletonModelsinTop-LevelAssembly70MBNeighboringSubassemblies320MBSubassembly,withSkeletonModelcontainingallrequiredinformation~20MB©2006PTC18Whatdoesanexamplelooklike?ThreePhasesPro/INTRALINKPro/CONCEPTISDXPro/ENGINEERPro/NOTEBOOKCONCEPTUALDESIGNCAPTUREDESIGNCRITERIADETAILEDDESIGN©2006PTC19ProductDefinition©2006PTC20ProductDefinition:EngineeringLayoutWhatitis:FirstthingdoneindesigncycleWhatitisNot:UsedtoevaluatekeyinterfacepointsUsedtoevaluat