DESIGN OF AUTO-BODY PANEL ADDENDUM BASED ON SWEEP SURFACE

Abstract

Making the addendum and blank-holder surface is key technique in auto-body panel stamping and die-face design and machining. A great number of experiments and numerical simulation based on CAE have fully validated that the shape and configuration of the addendum and blank-holder surface have obvious influence on the formability of the stamped panel. In the past design of the panel die, users design them by hand- craft scheme and based on their old design experience, which evidently decreases design efficiency. A design scheme of the addendum and blank-holder surface, which is based on sweep surface design method and can efficiently solve some troubles on making the addendum is proposed. Besides, the creating ideal and constructing scheme of the sweep surface design are introduced, and their relative algorithms are proposed in terms of the forming features of auto-body panels. The feasibility of the constructing scheme is explained from actual industrial forming examples. Compared with the creating scheme based on FE meshes used in some CAE software, the most advantage of the present method is that the addendum and blank-holder surface created by sweep surface scheme can be directly used in DNC machining; and in the same time, many automatic and self-adaptive design processes based on the present algorithm can obviously increase design efficiency on auto-body panel die-face.