Creo官方Top-Down设计资料

Capturing Design Intent Phase Skeleton Models
What needs to happen?

Capture conceptual design parameters within the context of the assembly Capture & control critical object interfaces in a single, convenient location
• • •
Empty Components; Copy from start models Automatic assembly of default datums Unplaced, Partially- & Over-Constrained Components
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Stage 3
Manage Interdependencies Phase Reference Viewer & Reference Graph
Tools to Manage References

External Reference Control
• Ensures
Top-Down Design methodology is followed

Foundation for efficient task distribution Assembly Population Environments
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Pro/E menus and Model Tree pop-up menus Pro/INTRALINK and PDMLink

Component Creation Methods

Quickly define product hierarchy
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Before any of the components’ geometry is defined

Intuitive, automatic mapping to “start models”
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Templates ensure all designs share the necessary common elements such as layers, views & parameters
Tips & Techniques
Top-Down Design Tools
Managing Complex Assemblies
Victor Remmers Holland Engineering Consultants BV
Top-Down Design Philosophy
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Assembly Tools
• •
Drag & Drop Placement Component Interfaces

Component Creation
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Within the context of the assembly
Mirror Parts or Subassemblies
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Stage 5
Communication of Design Intent Phase Publish Geoms, Copy Geoms & Inheritance
Publish Geometry Features

Provides ability to pre-determine the geometry to be referenced by a Copy Geometry feature Allows designers to define their interfaces to the rest of the design
design management rules directly into the design proper design reuse
• Incorporate
• Ensures

Pro/INTRALINK Model Tree Global Reference Viewer Reference Graph
1.
Conceptual Engineering Phase
Layouts and Engineering Notebook
2.
Preliminary Product Structure Phase
Pro/INTRALINK, Model Tree
3.
Capturing Design Intent Phase
Understand Existing Situation

High-level Requirements Space Allocation
Define New Space and Motion

2D Sketches 3D Models Rapid Iteration & Convergence Animations
External Copy Geometry

Build relationships on external models independent of an assembly Useful for coordinate system assembly practices
Inheritance – Inherit model geometry for one-way associativity Shrinkwrap (included in Foundation Advantage Package)
Component Design
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Component Design
Component Design
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Possible example Bottom Up?
Mate
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Top-Down Design Philosophy
“Top-Down Design”
Method
6.
Population of the Assembly Phase
Automatic Component Constraints & Component Interfaces
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The Bobcat example
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Stage 1
Conceptual Engineering Phase Layouts and Engineering Notebook
Skeleton Models
4.
Manage Interdependencies Phase
Reference Viewer & Reference Graph
5.
Communication of Design Intent Phase
Copy Geoms, Publish Geoms & Shrinkwrap
Capture Key Design Intent

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Parameters Notes Spreadsheets Proprietary Data
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Stage 2
Preliminary Product Structure Phase Pro/INTRALINK, Model Tree
How does Top Down Design relate to company goals?
Four Goals from Upper Management
1) Cycle Time Reduction. 2) Increase User Satisfaction with Software. 3) Margin Increase. 4) Cost Reduction.
Special Treatment in BOMs, Simplified Reps, Drawings, Model Tree & Mass Property Calculations Uniquely supported Scope Control Setting

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Stage 4
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Stage 6
Population of the Assembly Phase Automatic Component Constraints & Component Interfaces
What tools are available for populating the assembly?
Traditional Design Approach
“Bottom-Up Design”

Design of individual components independent of the assembly Manual approach to ensure that components fit properly and meet the design criteria Components and those placed in sub-assemblies are brought together to develop the top-level assembly Errors 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 time Top Level Assembly