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A Solid Modeling Fable

A Solid Modeling Fable. Ahmedabad -Visual Design Office Kolhapur -Mechanical Design Office Saki Naka – Die Manufacturer Lucknow - Soap manufacturer. Ahmedabad-Visual Design. Input : A dream soap tablet Output : Sketches/Drawings Weights Packaging needs. Soaps . More Soaps .

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A Solid Modeling Fable

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  1. A Solid Modeling Fable • Ahmedabad-Visual Design Office • Kolhapur-Mechanical Design Office • Saki Naka – Die Manufacturer • Lucknow- Soap manufacturer

  2. Ahmedabad-Visual Design • Input: A dream soap tablet • Output: • Sketches/Drawings • Weights • Packaging needs

  3. Soaps

  4. More Soaps

  5. Ahmedabad (Contd.) Top View Side View Front View

  6. Kolhapur-ME Design Office • Called an expert CARPENTER • Produce a model (check volume etc.) • Sample the model and produce a data- set

  7. Kolhapur(contd.)

  8. Kolhapur (contd.) • Connect these sample-points into a faceting • Do mechanical analysis • Send to Saki Naka

  9. Saki Naka-Die Manufacturer • Take the input faceted solid. • Produce Tool Paths • Produce Die

  10. Lucknow-Soaps • Use the die to manufacture soaps • Package and transport to points of sale

  11. Problems began… • The die degraded in Lucknow • The Carpenter died in Kolhapur • Saki Naka upgraded its CNC machine • The wooden model eroded But The Drawings were there!

  12. So Then…. • The same process was repeated but… The shape was different! The customer was suspicious and sales dropped!!!

  13. The Soap Alive!

  14. What was lacking was… A Reproducible Solid-Model. • Surfaces defn • Tactile/point sampling • Volume computation • Analysis

  15. The Solid-Modeller Representations Operations Modeller

  16. Operations Volume Unions/Intersections Extrude holes/bosses Ribs, fillets, blends etc. Representation Faceted Solid Cloud of Points STEPP Boundary-Rep (b-rep) .sldprt The mechanical solid-modeller

  17. Examples of Solid Models Torus Lock

  18. Even more examples Bearing Slanted Torus

  19. Examples (Contd.) Solid Model of an Ice-Cream Machine

  20. Sample Representations

  21. Other Modellers-Surface Modelling

  22. Chemical Plants • Design Rules -process rules -tolerances • Civil-Mechanical Co-Design -facility design -accessibility -safety

  23. Chemical plants (contd.)

  24. Chemical Plants (contd.)

  25. Advanced Surface Modelling Human Cortex Manual Surface Sampling,/ model consists of 24,000 planer facets

  26. Advanced Surface Modelling (Contd.) The above surface model was created by using the software tool (Nuages) by Bernard Geiger Voxel based re-construction shows the surface decimated to about 22500 vertices and 45000 triangles

  27. Our Course-Theory • Topology-combinatorial entities and their relationships • Geometry- parametrizable entities and their representations • Operations- some of them and their implementations source:www.cse.iitb.ac.in/~sohoni CAGD course notes

  28. Our Course-Applications • Basic solid-modelling • Design Trees and re-parametrization • MIL (B-rep) and geometry

  29. Course Schedule

  30. Contents I

  31. Contents II

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