A survey of the technology development of CAD/CAM in dies and moulds

A brief account of the technological development of CAD/CAM in dies and moulds at home and abroad is given in this article. The keys of the technology are to make design process standardized, to get reliable algorithm of different design methods and to work out rational data structure. It is clarified that geometric modelling is very important in CAD/CAM of dies and moulds, for it offers an initial integrate design information to be used through whole design process. Current research situation and existing problems of two dimensional geometric modelling available now are also briefly shown here.