A new method of constituting CAD standard parts base

摘要

Computer aided graph design and drawing is one of the importantest links of CAD. In engineering practice, a large number of standard parts and units are often used repetitionally. Therefore it is absolutely necessary to constitute graph base of common use standard parts and units to improve the efficiency of designers, lighten their intensity of labour and realise the computerization of design and drawing. This paper will introduce a new flexible and practical method of constituting the base of standard parts. The base is established by the joint of CAD software package system appointing and mechanical engineers defining, retrieved by selecting the simple graphic menu positioned on tablet as a consequence the base can be expanded randomly by users according to circumstances and retrieved conveniently.