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Computer-aided Design

Computer-aided Design. Slides Prepared by Junwei Zhang 8 May 2002. Overview. What is Computer-aided Design? Will CAD work for me? How does it work? Advantages and Disadvantages Future Trends Rollerblade Inc. Six ways to choose the right CAD for you Summary.

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Computer-aided Design

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  1. Computer-aided Design Slides Prepared by Junwei Zhang 8 May 2002

  2. Overview • What is Computer-aided Design? • Will CAD work for me? • How does it work? • Advantages and Disadvantages • Future Trends • Rollerblade Inc. • Six ways to choose the right CAD for you • Summary

  3. What Is Computer-aided Design(CAD) • A software system that uses computer graphics to assist in the creation, modification, and analysis of a design.

  4. What Is Computer-aided Design (CAD Retrospective) • 1982 Solid modeling has proliferated to CAD systems • 1983 3D developed in Sweden • 1986 Autodesk's AutoCAD is the most popular microcomputer design program • 1989 NASA develops high-end data visualization programs

  5. What Is Computer-aided Design (CAD Retrospective) • 1990 Manufacturers take advantage of NC simulation software to graphically depict tool paths to detect machining errors before actual metal cutting commences • 1998 Chrysler becomes the first automaker to adopt a fully digital, "Cyber-synthesis" process.

  6. What Is Computer-aided Design (CAD Retrospective) • 1998 Mechanical CAD vendors battle for a share of the midrange market • 2000 Moving design engineering from the desktop to the Web • 2001 The same CAD data used to design cars is also used to market them

  7. Will CAD work for me? • Speeding up the prototype testing process, and consequently, shortening the product design cycle significantly? • Taking advantage of 3D modeling tools to translate visions into realities?

  8. Will CAD work for me? • To best describe a product in order to gain approval from marketing? • Provide instructions to manufacturing?

  9. How Does It Work? • Geometric modeling • Automated drafting and documentation • Engineering analysis and design analysis

  10. How Does It Work? • Geometric modeling • Uses basic lines, curves, and shapes to generate the geometry and topology of a part • 2D Technical drawing General-Purpose drafting • 3D Difficult to master Freely rotate and zoom a model

  11. How Does It Work? • Automated drafting and documentation • Produces engineering drawings directly from the CAD database • More advanced documentation merges text and graphics to produce assembly drawings, bills of material, instruction manuals and reports, parts catalogs, and sales brochures

  12. How Does It Work? • Engineering analysis and design analysis • Is also called computer-aided engineering • Tests and analyzes designs on the computer screen

  13. Advantages • Reduce the lead time for new product introduction • Products can be tested more quickly • Costly mistakes in design or production can be avoided

  14. Advantages • Time to manufacture can be reduced • Documentation can be printed in various forms for multiple users • The quality of designs and the products manufactured from them is improved

  15. Disadvantages • Incompatibility • Complex Surfaces

  16. Future Trends • Design software is getting easier to use • National CAD standard

  17. Rollerblade Inc. • Background • headquartered in Minnetonka, Minnesota • founder and market leader of the in-line skating industry

  18. Rollerblade Inc. • Implementation • Software: Vellum, Alias Studio, Alias StudioPaint 3D, Pro/Engineer • speed up the prototype testing stage of the design development process • skate can be produced not only faster, but more cheaply as well.

  19. Six ways to choose the right CAD for you • Check around to see what your co-workers are using • Do not buy based on price • Define how often you will use the software. • Narrow software selections • Check out vendor demos • After the demonstrations, narrow the choice down to two or three

  20. Exercise • Divide into groups • List company designing problems • Compare to brainstorming questions • How are problems solved by CAD?

  21. Summary • Time-saving • Efficient design tool • Improve product quality • Communicate through the web

  22. Bibliography • Russell, Roberta Operations Management Prentice Hall, Inc. 2000 • Rowell, Amy “Designing To Win” Computer Graphics World March, 1997 • Stevens, Tim “The cost of CAD Incompatibility” www.IndustryWeek.com June 11, 2001 • www.bdcmag.com • Meyer, Ann “TRW Faces CAD Translation Nightmares” Computer Graphics World June, 1997

  23. Bibliography • Rowell, Amy “The Challenge of Cad Interoperability” Computer Graphics World June, 1997 • Smith, Susan “The Challenges of Complex Surfaces” Computer Graphics World November, 1996 • Potter,Caren D. “Engineering on the Internet” Computer Graphics World August, 1996 • Rowell, Amy “The 2D Cad Option” Computer Graphics World August, 1996 • Hudspeth, Michael “Planning the move to 3D design” Machine Design Oct 25, 2001

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