2. Geometric Data Exchange
Solid Works
CATIA
Creo
Geometric Model
MasterCAM
DellCAM
EspritCAM

3. Geometric Data Exchange
The Need
Heterogeneous expertise
Use of separate software for design and manufacturing
Migration from one system to another
Data exchange with collaborators / customers / suppliers

4. Geometric Data Exchange
Two Options
One native format to another directly
One native format to another via a standard format

5. Geometric Data Exchange
Geometric Format (Software I)
Geometric Format (Software II)
Intermediate Geometric Format
Geometric Format (Software I)
Geometric Format (Software II)

6. Geometric Data Formats
IGES
Stands for Initial Graphics Exchange Specification.
Topology and geometry of given object
is stored separately.
Both binary and ASCII formats are
permissible

7. Standards for Product Modeling
What is STEP ?
Stands for STandard for Exchange of
Product data (ISO 10303).
International effort to develop standards
for computer interpretable representation
and exchange of product data.

8. STEP
Function
Specifications & Constraints
Geometry
Design History
Material
Assembly & Bill of Materials
Tolerances & Surface Finish
Process data
Business Information

9. STEP-NC Why STEP NC (ISO 14649) ?
Elimination of G & M Codes (ISO 6983)
Machine Independent Code (single file)
customized tool paths
Process planning and production planning information along with NC tool paths
Interface with STEP (ISO 10303)
Feature based
Internet enabled (portable)
Provision of Feedback (Bidirectional Data Flow)
Provision for Process Optimization

10. STEP-NC

11. STEP-NC

12. STEP-NC …

13. STEP-NC

14. Exemples of strategies built on pattern curves :
STEP-NC
Pattern strategies : GUIDE CURVE + PATTERN
Exemples of strategies built on pattern curves :
Trochoïdal
milling :
Plunge
milling :