PTC自顶向下(Top-Down)设计教程

Top-DownDesignTools

ManagingComplexAssembliesVictorRemmers

HollandEngineeringConsultantsBVTips&TechniquesTop-DownDesignPhilosophyTraditionalDesignApproach“Bottom-UpDesign”

DesignofindividualcomponentsindependentoftheassemblyManualapproachtoensurethatcomponentsfitproperlyandmeetthedesigncriteriaComponentsandthoseplacedinsub-assembliesarebroughttogethertodevelopthetop-levelassemblyErrorsaremanuallyidentifiedandmodificationstoeachcomponentaremadetomaketheadjustment.Asassemblygrows,detectingtheseinconsistenciesandcorrectingthemcanconsumeaconsiderableamountoftimeTopLevelAssemblyComponentDesignComponentDesignComponentDesignPossibleexampleBottomUp?MateTop-DownDesignPhilosophy“Top-DownDesign”

Methodofplacingcriticalinformationinahigh-levellocationCommunicatingthatinformationtothelowerlevelsoftheproductstructureCapturingtheoveralldesigninformationinonecentralizedlocationDesignInformationComponentComponentComponentAmoreintegratedapproach….TopDownDesignStages–Itisaconcept.6-StageProcessConceptualEngineeringPhaseLayoutsandEngineeringNotebookPreliminaryProductStructurePhase

Pro/INTRALINK,ModelTreeCapturingDesignIntentPhaseSkeletonModelsManageInterdependenciesPhaseReferenceViewer&ReferenceGraphCommunicationofDesignIntentPhaseCopyGeoms,PublishGeoms&ShrinkwrapPopulationoftheAssemblyPhaseAutomaticComponentConstraints&ComponentInterfacesTheBobcatexampleConceptualEngineeringPhase

LayoutsandEngineeringNotebookUnderstandExistingSituationHigh-levelRequirementsSpaceAllocationDefineNewSpaceandMotion2DSketches3DModelsRapidIteration&ConvergenceAnimationsCaptureKeyDesignIntentParametersNotesSpreadsheetsProprietaryDataStage1PreliminaryProductStructurePhase

Pro/INTRALINK,ModelTreeQuicklydefineproducthierarchyBeforeanyofthecomponents’geometryisdefinedIntuitive,automaticmappingto“startmodels”Templatesensurealldesignssharethenecessarycommonelementssuchaslayers,views¶metersFoundationforefficienttaskdistributionAssemblyPopulationEnvironmentsPro/EmenusandModelTreepop-upmenusPro/INTRALINKandPDMLinkComponentCreationMethodsEmptyComponents;CopyfromstartmodelsAutomaticassemblyofdefaultdatumsUnplaced,Partially-&Over-ConstrainedComponentsStage2CapturingDesignIntentPhase

SkeletonModelsWhatneedstohappen?CaptureconceptualdesignparameterswithinthecontextoftheassemblyCapture&controlcriticalobjectinterfacesinasingle,convenientlocationHow?SkeletonModels…CentralizedpathwayforcommunicationFacilitatetaskdistributionPromotewell-organizeddesignenvironmentsEnablefaster,moreefficientpropagationofchangeSpecialTreatmentinBOMs,SimplifiedReps,Drawings,ModelTree&MassPropertyCalculationsUniquelysupportedScopeControlSettingStage3ManageInterdependenciesPhase

ReferenceViewer&ReferenceGraphStage4ToolstoManageReferencesExternalReferenceControlEnsuresTop-DownDesignmethodologyisfollowedIncorporatedesignmanagementrulesdirectlyintothedesignEnsuresproperdesignreusePro/INTRALINKModelTreeGlobalReferenceViewerReferenceGraphCommunicationofDesignIntentPhase

PublishGeoms,CopyGeoms&InheritancePublishGeometryFeaturesProvidesabilitytopre-determinethegeometrytobereferencedbyaCopyGeometryfeatureAllowsdesignerstodefinetheirinterfacestotherestofthedesignCopyGeometryFeaturesAllowscopyingofalltypesofgeometrySurfaces,edges,curves,datums,quilts,copy/publishgeometryRetainscopiedgeometrynameandlayersettingsDependencyonparentgeometrycanbetoggledCanbe“Externalized”ExternalCopyGeometryBuildrelationshipsonexternalmodelsindependentofanassemblyUsefulforcoordinatesystemassemblypracticesInheritance–Inheritmodelgeometryforone-wayassociativityShrinkwrap(includedinFoundationAdvantagePackage)Stage5PopulationoftheAssemblyPhase

AutomaticComponentConstraints&ComponentInterfacesStage6Whattoolsareavailableforpopulatingtheassembly?AssemblyToolsDrag&DropPlacementComponentInterfacesComponentCreationWithinthecontextoftheassemblyMirrorPartsorSubassembliesHowdoesTopDownDesignrelatetocompanygoals?FourGoalsfromUpperManagement1)CycleTimeReduction.2)IncreaseUserSatisfactionwithSoftware.3)MarginIncrease.4)CostReduction.Whyshouldyouuseit?Benefits:ReduceddesigntimeReducederrors(rightthefirsttime)IncreasedqualityBetterprojectmanagementvisibilityConcurrentengineeringConfidenceintop-levelregenerationKnowledgeofhowmodulesinterfaceTop-levelchangecontrolExample:todesignanalternator...Whatinformationshouldadesignerneedtoworkwithmosttimes?CompleteTop-LevelAssembly540MBAllSkeletonModelsinTop-LevelAssembly70MBNeighboringSubassemblies320MBSubassembly,withSkeletonModelcontainingallrequiredinformation~20MBWhatdoesanexamplelooklike?ThreePhasesPro/INTRALINKPro/CONCEPTISDXPro/ENGINEERPro/NOTEBOOKCONCEPTUALDESIGNCAPTUREDESIGNCRITERIADETAILEDDESIGNProductDefinitionProductDefinition:EngineeringLayoutWhatitis:

FirstthingdoneindesigncycleWhatitisNot:

Usedtoevaluatekeyinterfacepoints

Usedtoevaluatekeycomponentsofproject

Threedimensionalsolids

FullydetailedAdvantagesofUsingaLayoutDocumentdesigninformationinonecentralizedlocationDocumentdesigninformationbeforecreatingsolidmodelsInvestigatedesignoptionswithoutinvolvingtheentireassemblyEasilymakedesignchangesbecauseallofthedesigninformationiscontainedinonelocation#2ProductDefinition:AssemblyStructure

Whatitis:

VirtualAssembly/BOM

WhatitisNot:

Usedtoorganizeassembly&assigningofdesigntasks

Usedtoinputnon-geometricaldataup-front

Threedimensionalsolids

Fullydetailed

FullyconstrainedAdvantagesofDefiningPreliminaryProductStructureDefiningtheproductstructurepriortodefininggeometrycanassistyouinorganizingtheassemblyintomanageabletasksthatcanbeassignedtodesignteamsorindividualdesigners.Associatespecificlibraryparts(thataretobeusedontheproject)withtheassemblyatthestartofthedesign,preventingconfusionlater.AdvantagesofDefiningPreliminaryProductStructureCont…SubmittheassemblytoPro/INTRALINKorPDMLinkandassignmodelstotheappropriatevaultsorfolders.Individualdesignerscanfocusonspecificdesigntasksinsteadofonhowtheirdesignisgoingtofitintotheoverallstructure.Inputnon-geometricalinformationsuchasthepartnumber,designer’sname,etc.,ataveryearlystage.#3ProductDefinition:Skeletons

Whatitis:

Zero-massgeometry

WhatitisNot:

Exactlocationdetail

Threedimensionalsolids

Fullydetailed

MinimizedgeometricdetailAndDefinitelyNotThis!!

AdvantagesofUsingSkeletonsProvidesacentralizedlocationfordesigndataSimplifiesassemblycreation/visualizationAidsinassemblingmechanismsMinimizesunwantedparent-childrelationshipsAllowsyoutoassemblecomponentsinanyorderControlspropagationofexternalreferences

CentralsourceforinformationBenefitsofCommunicatingInformationFromaCentralSourceTaskdistributionConcurrentModelingManagingExternalReferences

ToolsDeclarationPublishGeometryCopyGeometryHierarchyTop_level.asmTop_level_skeleton.prtSub_assy_1.asmSub_assy_1_skeleton.prtSub_assy_2.asmSub_assy_2_skeleton.prt

Sub_assy_x.asmSub_assy_x_skeleton.prt3DDesign…Finally!Thefoundationisset…buttopologicallymodifiable…it’stimefor3D.WithReferenceControlManager,youaresafetocreateyourpartsdirectlyintheassembly.MoreThanMeetsTheEye!Interchangeability:FamilyofTablesInterchangeAssemblyLayoutDeclarationsPowerofTop-DownDesignToAchieveAdvancedAutomation,considerusing:RelationsPro/ProgramMiscellaneousTipsSeparatePartVersusAssemblyforSkeletonFeaturesAvoidconstructingassembly-levelskeletonfeaturessincethesystemrequiresthatyouperformalleditsofthesefeaturesinAssemblymode.Thecomponentscanbecomeanobstructionanddegradeperformance.Furthermore,youcannoteasilyreuseskeletonfeaturesattheassemblylevelinothersubassemblies.Byusingaseparatepartfile,youcaneditthefeatureinPartModeandreassembleitintomanydifferentassemblies.GeometryFeaturesPlaceallstaticinformationinaskeletonasearlyaspossibleandplacealldynamicinformationlaterinthedesignprocesscycle.MiscellaneousTipsDatumsforSkeletonModelsConsiderrenamingskeletondatumsto“sk_”VisualizationUsesimplifiedrepsandtransparencyprolificallytomakeviewingeasierUse“displaystates”tohighlightdifferentitemsatdifferenttimesUsesurfacestoclarifymeaningofcenterlines&axesConceptualizationDon’tbeafraidtousesimplehandsketchesbeforedelvingintocomplexsituations…it’sNOTillegalPro/EWildfireEnhancements

High-performanceAssemblyModelingLightweightComponentsRepresentcommoncomponentswithlightweightgraphicsforoptimumdisplayspeedAccuratemasspropertiesandBOMsCustomizablesymbolicrepresentationsFlexibleComponentsRepresentmultiplestatesofa

singlecomponentinanassemblyAddressescriticalneedforconsistency

betweenBOMandassemblymodelIntelligentRegenerationAssemblyregenerationisupto80%Faster!HighlightsofTop-DownDesignCaptureknowledge,ordesignintent,allowingyoutoconcentrateonsignificantissuesbymakingthesoftwareperformtedious,repetitivecalculations.Enabletheframeworkforinterchangeabilityofcomponentsallowingforhigh-velocityproductdevelopmentbysupportingrapiditerationsofproductvariations.Createaconcurrentdesignenvironmentbyspreadingprojectdesignresponsibilityacrossmanyorganizationallevels.NewinAdvancedAssemblyinWildfire3.0DataSharingDashboardTheDataSharingdashboardconsolidatestheMerge,Cutout,andInheritancefeaturesinamodern