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Chapter1 Introduction

1.5 CAD/CAM History

The concept of CAD and CAM is relatively new. The usage is linked with the development of computers. The actual application of CAD/CAM in industry, academia and government is only approximately 30 years old. Formal courses in CAD and Finite Element Analysis (FEA) were introduced in 1970’s. The major application thrust of CAD came in 1980’s, with the availability of PCs and workstations. In its early stage of usage, very few engineering companies could afford the expense of mainframe computers; however, PCs and workstations have evolved into affordable and adequate platform to support comprehensive CAD packages that initially were designed to run on the mainframe platform. A brief history of the evolution of CAD/CAM, according to the decade and the major CAD/CAM developments, is outlined below.

1960’s

  • Development in Interactive computer graphics research

  • Sketchpad system developed by Ivan Sutherland in 1962

  • CAD term coined

  • First major commercial CAD/CAM software available: CADAM by Lockheed, in 1965

  • Bell Telephone’s - Graphics 1 remote display system developed

1970’s

  • Application of CAM in government, industry and academia

  • National organization formed

  • Beginning of usage of computer graphics

  • Turnkey system available for drafting

  • Wireframe and surface modeling software became available

  • Mass property calculation and FEA software became available

  • NC tape generating, verification, and integrated circuit software became available

1980’s

  • CAD/CAM used for engineering research and development

  • New CAD/CAM theories and algorithms developed

  • Integration of CAD/CAM

  • Solid modeling software became available

  • Use of PCs and workstation began

1990’s

  • Concept of concurrent engineering developed

  • Increased use of CAD/CAM on PCs and worksations

  • Improvements in hardware and software

Lecture Notes © by R. B. Agarwal

Computer Aided Design in Mechanical Engineering

1-5

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