3 Traditional Design Approach “Bottom-Up Design”Design of individual components independent of the assemblyManual approach to ensure that components fit properly and meet the design criteriaComponents and those placed in sub-assemblies are brought together to develop the top-level assemblyErrors are manually identified and modifications to each component are made to make the adjustment. As assembly grows, detecting these inconsistencies and correcting them can consume a considerable amount of timeTop Level AssemblyComponentDesignComponentDesignComponentDesign
5 Top-Down Design Philosophy Method of placing critical information in a high-level locationCommunicating that information to the lower levels of the product structureCapturing the overall design information in one centralized locationDesignInformationComponentComponentComponent
7 Top Down Design Stages – It is a concept. 6-Stage ProcessConceptual Engineering PhaseLayouts and Engineering NotebookPreliminary Product Structure PhasePro/INTRALINK, Model TreeCapturing Design Intent PhaseSkeleton ModelsManage Interdependencies PhaseReference Viewer & Reference GraphCommunication of Design Intent PhaseCopy Geoms, Publish Geoms & ShrinkwrapPopulation of the Assembly PhaseAutomatic Component Constraints & Component Interfaces
9 Conceptual Engineering Phase Layouts and Engineering Notebook Stage 1Conceptual Engineering Phase Layouts and Engineering NotebookUnderstand Existing SituationHigh-level RequirementsSpace AllocationDefine New Space and Motion2D Sketches3D ModelsRapid Iteration & ConvergenceAnimationsCapture Key Design IntentParametersNotesSpreadsheetsProprietary Data
10 Preliminary Product Structure Phase Pro/INTRALINK, Model Tree Stage 2Preliminary Product Structure Phase Pro/INTRALINK, Model TreeQuickly define product hierarchyBefore any of the components’ geometry is definedIntuitive, automatic mapping to “start models”Templates ensure all designs share the necessary common elements such as layers, views & parametersFoundation for efficient task distributionAssembly Population EnvironmentsPro/E menus and Model Tree pop-up menusPro/INTRALINK and PDMLinkComponent Creation MethodsEmpty Components; Copy from start modelsAutomatic assembly of default datumsUnplaced, Partially- & Over-Constrained Components
11 Capturing Design Intent Phase Skeleton Models Stage 3Capturing Design Intent Phase Skeleton ModelsWhat needs to happen?Capture conceptual design parameters within the context of the assemblyCapture & control critical object interfaces in a single, convenient locationHow? Skeleton Models…Centralized pathway for communicationFacilitate task distributionPromote well-organized design environmentsEnable faster, more efficient propagation of changeSpecial Treatment in BOMs, Simplified Reps, Drawings, Model Tree & Mass Property CalculationsUniquely supported Scope Control Setting
13 Stage 5Communication of Design Intent Phase Publish Geoms, Copy Geoms & InheritancePublish Geometry FeaturesProvides ability to pre-determine the geometry to be referenced by a Copy Geometry featureAllows designers to define their interfaces to the rest of the designCopy Geometry FeaturesAllows copying of all types of geometrySurfaces, edges, curves, datums, quilts, copy/publish geometryRetains copied geometry name and layer settingsDependency on parent geometry can be toggledCan be “Externalized”External Copy GeometryBuild relationships on external models independent of an assemblyUseful for coordinate system assembly practicesInheritance – Inherit model geometry for one-way associativityShrinkwrap (included in Foundation Advantage Package)
14 Stage 6Population of the Assembly Phase Automatic Component Constraints & Component InterfacesWhat tools are available for populating the assembly?Assembly ToolsDrag & Drop PlacementComponent InterfacesComponent CreationWithin the context of the assemblyMirror Parts or Subassemblies
15 How does Top Down Design relate to company goals? Four Goals from Upper Management1) Cycle Time Reduction.2) Increase User Satisfaction with Software.3) Margin Increase.4) Cost Reduction.
17 Example: to design an alternator... What information should a designer need to work with most times?Neighboring Subassemblies320MBComplete Top-Level Assembly540 MBAll Skeleton Models in Top-Level Assembly70 MBSubassembly,with Skeleton Model containingall required information ~ 20 MB
18 What does an example look like? Three PhasesPro/INTRALINKPro/CONCEPTISDXPro/ENGINEERPro/NOTEBOOKCAPTURE DESIGN CRITERIACONCEPTUAL DESIGNDETAILED DESIGN
20 Product Definition: Engineering Layout What it is:First thing done in design cycleUsed to evaluate key interface pointsUsed to evaluate key components of projectWhat it is Not:Three dimensional solidsFully detailed
21 Advantages of Using a Layout Document design information in one centralized locationDocument design information before creating solid modelsInvestigate design options without involving the entire assemblyEasily make design changes because all of the design information is contained in one location
22 #2 Product Definition: Assembly Structure What it is:Virtual Assembly / BOMUsed to organize assembly & assigning of design tasksUsed to input non-geometrical data up-frontWhat it is Not:Three dimensional solidsFully detailedFully constrained
23 Advantages of Defining Preliminary Product Structure Defining the product structure prior to defining geometry can assist you in organizing the assembly into manageable tasks that can be assigned to design teams or individual designers.Associate specific library parts (that are to be used on the project) with the assembly at the start of the design, preventing confusion later.
24 Advantages of Defining Preliminary Product Structure Cont…Submit the assembly to Pro/INTRALINK or PDMLink and assign models to the appropriate vaults or folders.Individual designers can focus on specific design tasks instead of on how their design is going to fit into the overall structure.Input non-geometrical information such as the part number, designer’s name, etc., at a very early stage.
25 #3 Product Definition: Skeletons What it is:Zero-mass geometryExact location detailMinimized geometric detailWhat it is Not:Three dimensional solidsFully detailed
27 Advantages of Using Skeletons Provides a centralized location for design dataSimplifies assembly creation / visualizationAids in assembling mechanismsMinimizes unwanted parent-child relationshipsAllows you to assemble components in any orderControls propagation of external references
28 Central source for information Benefits of Communicating Information From a Central SourceTask distributionConcurrent ModelingManaging External ReferencesToolsDeclarationPublish GeometryCopy Geometry
30 3D Design … Finally!The foundation is set … but topologically modifiable … it’s time for 3D.With Reference Control Manager, you are safe to create your parts directly in the assembly.
31 More Than Meets The Eye! Interchangeability: Family of Tables Interchange AssemblyLayout Declarations
32 Power of Top-Down Design To Achieve Advanced Automation, consider using:RelationsPro/Program
33 Miscellaneous Tips Separate Part Versus Assembly for Skeleton Features Avoid constructing assembly-level skeleton features since the system requires that you perform all edits of these features in Assembly mode.The components can become an obstruction and degrade performance.Furthermore, you cannot easily reuse skeleton features at the assembly level in other subassemblies. By using a separate part file, you can edit the feature in Part Mode and reassemble it into many different assemblies.Geometry FeaturesPlace all static information in a skeleton as early as possible and place all dynamic information later in the design process cycle.
34 Miscellaneous Tips Datums for Skeleton Models Visualization Consider renaming skeleton datums to “sk_”VisualizationUse simplified reps and transparency prolifically to make viewing easierUse “display states” to highlight different items at different timesUse surfaces to clarify meaning of centerlines & axesConceptualizationDon’t be afraid to use simple hand sketches before delving into complex situations … it’s NOT illegal
36 Highlights of Top-Down Design Capture knowledge, or design intent, allowing you to concentrate on significant issues by making the software perform tedious, repetitive calculations.Enable the framework for interchangeability of components allowing for high-velocity product development by supporting rapid iterations of product variations.Create a concurrent design environment by spreading project design responsibility across many organizational levels.
37 New in Advanced Assembly in Wildfire 3.0 Data Sharing DashboardThe Data Sharing dashboard consolidates the Merge, Cutout, and Inheritance features in a modern user interface.Enhancements to Data Sharing features in a new dashboard offer many benefits:Allows changing of multiple feature types at any pointOffers a user-friendly user interface with easy access to commandsSupports object-action workflow for increased productivityConsolidates Data Sharing features, such as Merge, Cutout, and Inheritance
38 New in Advanced Assembly in Wildfire 3.0 (#2) Top-Down Design with Mechanism AssembliesYou can now design a skeleton model that includes motion.Motion skeletons are available in Assembly, allowing motion to be incorporated into the model at the beginning of the design process. There is no longer a need to recreate an assembly to include a mechanism analysis.You can create mechanism bodies and connections as a motion skeleton, then run a simple kinematic analysis to ensure that the skeleton provides the appropriate degrees of freedom. You can then create and assemble components to the motion skeleton. Motion skeletons are defined in the same way as normal assembly skeletons and include reference control settings. They do not appear in the assembly bill of materials.