Chapter 3 - CAD organization and applications

Abstract

This chapter focuses on the various applications of computer aided design (CAD). CAD has the ability to store line systems and other entities, which are frequently used in drawings. For repetitive use on a drawing, a typical item can be retrieved and positioned in seconds, and can also be oriented at any angle to suit particular circumstances. CAD program also provide basic geometric features, which permit the operator to blend lines and arcs. The ability to zoom in and out is also an asset while drawing to scale, which makes it possible to work on fine detail in an assembly and then zoom out to observe the result in context. CAD information is stored in digital form and hence, irrespective of the size of the final printed drawing, it is possible to accurately dimension components automatically. The fast track nature of the design and construction during product development requires an extensive application of CAD, where individual contractors responsible for electrical, mechanical, and ducting work can be networked on site, and could refer to CAD data from each other. The parametric capability of the CAD system can be used to considerably improve productivity in this area of drawing office work. For a given thread size and screw length, the CAD system is able to produce a true-to-size drawing of any individual screw. This drawing can then be used as part of an assembly drawing, or fully dimensioned and suitable for manufacturing purposes. CAD systems can also offer great assistance in designing components that has to be manufactured from folded sheet metal.