Introduction to CAD
What is CAD? History CAD Drawings CAD Industry
What is CAD?
History
CAD Drawings
CAD Industry
Computer-aided Design (CAD) or Computer-aided Design And Drafting (CADD) Uses computer-technology to make quick and accurate drawings, intricate designs and designdocumentations Modern CAD software makes 3D renderings easily. So, basically a computer program for making engineering and technical drawings.
What is CAD?
History
CAD Drawings
CAD Industry
So who uses it?
Civil-Engineers Architects Animation industry Automobile industry Aircraft Industry Gaming industry Web-designers Fashion Designers Machine Manufacturers And of-course, teachers and students.
What is CAD?
History
CAD Drawings
CAD Industry
1940s: Some of the mathematical description work on curves was developed in the early 1940s by Robert Issac Newton. Robert A. Heinlein in his 1957 novel “The Door into Summer” suggested the possibility of a robotic “Drafting Dan.” However, probably the most important work on polynomial curves and sculptured surface was done by Pierre Bézier (Renault), Paul de Casteljau (Citroen), Steven Anson Coons (MIT, Ford), James Ferguson (Boeing), Carl de Boor (GM), Birkhoff (GM) and Garibedian (GM) in the 1960s and W. Gordon (GM) and R. Riesenfeld in the 1970s.
1960s: Found use in the aircraft and automotive industries
What is CAD?
History
CAD Drawings
CAD Industry
The first commercial applications of CAD were in large companies in the automotive and aerospace industries, as well as in electronics. Only large corporations could afford the computers capable of performing the calculations. Notable company projects were at GM ,Lockheed and Renault (Bézier) – UNISURF 1971 car body design and tooling. 1971: Founding of MCS (Manufacturing And Consulting Services Inc.) one of the most influential events; supplied code to companies such as McDonnell Douglas (Unigraphics), Computervision (CADDS), Calma, Gerber, Autotrol and Control Data.
What is CAD?
History
CAD Drawings
CAD Industry
A few years ago, CAD quite an exclusive computer-program Was meant only for engineering applications that needed high degree of precision. Only very large firms could afford CAD software (and the large, powerful computers needed to run it).
And today………
What is CAD?
History
CAD Drawings
CAD Industry
…used by businesses large and small, and even individuals. (Personal computing revolution, and especially high end graphics cards, cheaper memory) Used in an extremely wide variety of businesses.
To draw an object: Need to be specific about the of lines, arcs or any other shapes….. What is CAD?
History
Must specify where each line and arc starts, where it ends, the center point of the arc, the radius, etc.
CAD Drawings
Must specify, units, scale. CAD Industry
Separate functions to draw text, dimensions, patterns, symbols, and 14 other shapes
Based on program level, divided into: What is CAD?
History
Low-end programs: Have just the basic drawing capabilities Commonly used for general drawing works Mid-range programs: Almost 80% of all the cad programs fall here
CAD Drawings
CAD Industry
Offer advanced drafting techniques such as layers, 3D, basic database capabilities, advanced dimensioning and many automated drawing features Commonly used by architecture engineering design firms
and
Advanced Programs: What is CAD?
History
CAD Drawings
Have integrated features such as engineering, solid modeling, analysis, design, database and project management Can be customized to meet the specific client requirements Few such programs available
CAD Industry
Priced very high Commonly used by large corporations for manufacturing
Some of the most popular brand-names: •Solid Works •AutoDesk •AutoCAD •Turbo CAD •Micro Station
References: Websites 1. http://www.cadazz.com/cad-software-history.htm 2. http://www.caddprimer.com/cadd_primer_chapters/drawing_des ign_automation_introduction_0.htm
