Study on the Description and Calculation Method of Part Box Information in CAPP

This paper studies the description method of part box information considering its character and the need of CAPP. The geometrical and topological information of part box is obtained in the environment of AutoCAD by the method of preorder traversing binary tree, and the information can be transfer (directly) to CAPP, so it is convenient to combine CAD with CAPP by this description and calculation method.