Research on parametric feature modeling based on knowledge

A method of parametric feature modeling based on knowledge is discussed in the paper, and the system structure and realization of the parametric feature modeling system based on knowledge is presented. By setting up a product repository, this method can not only efficiently accomplish dimension-driven and feature-driven in the parametric feature modeling but also display 3D-model of the product in time and put forward real-time adjusting plan according to product model. As a result the product design becomes easier and more efficient. Combining the design process of shaft parts, the CAD system of shaft parts is developed.