Exchange Of CAD Data Contents

1. Why a Seminar?

· Amounts and types of data

· Types of problems

· Costs for problems

· Safer Processes

· Workarounds

2. What kind of data in a CAD model?

· Glossary

· Geometry entity types: Wires, Surfaces, Trimmed surfaces

· Solids

· NURBS

· Other entity types

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

· Feature (History) Tree

· Drawing (2D) data

· Assemblies, Subassemblies, Parts

· Tolerances

· 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

· Risks

· 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