Exchange Of CAD Data Contents


1. Why a Seminar?

        Amounts and types of data

        Types of problems

        Costs for problems

        Safer Processes



2. What kind of data in a CAD model?


        Geometry entity types: Wires, Surfaces, Trimmed surfaces



        Other entity types

        Organization: Groups, Layers, Filters, Colors, Line types

        Feature (History) Tree

        Drawing (2D) data

        Assemblies, Subassemblies, Parts


        Special data for down-stream systems


3. What data and how is data used by downstream systems?

        Standalone downstream systems

        Same CAD system used by all

        Mainly 3D geometry

        Extraction of data

        Special CAD models

        Many iterations (changes) in industrial processes


        Product Data Management systems


4. How is CAD Data Exchanged?

        Different types of CAD Data Exchange models (Interfaces)

        Iges (detailed)

        VDAFS, STEP, ACIS, Robcad,

        Catia, Unigraphics


5. What kind of problems and why?

        Curve problems

        Surface (patch) problems

        Trimmed surface (face) problems

        Solid problems

        Other problems

        Example from AutoCad

        Summary problems


6. How can a problem be solved?

        Use of other systems import/export functions

        Log files

        Use of special systems that can heal geometry

        Internet help

        Debugger (programmer) often necessary

        Solve problems in the CAD source system!


7. How can the CAD Data Exchange process be made safer?

        Settings for export (flavors of import systems)

        Check (test) process

        Instructions (rules) for the CAD users

        JAMA and VDA (Quality contracts)



8. Data Exchange in the future

        Typical Interface Program today

        Export/import the Feature Tree

        Use the geometry functions of the exporting system

        Exchange Data in the future


9. Conclusions