Design and Optimization of Addendum Surfaces in Sheet Metal Forming Process

Abstract

In the sheet forming process, addendum surfaces have an important influence on the formability of the workpiece. If the design of addendum surfaces is done manually with a CAD software, many corrections should be made according to the experimental or/and numerical results. This study proposes an automatic procedure for the design and optimization of addendum surfaces by using our fast Inverse Approach and two optimization algorithms. The present optimization procedure is applied to the Renault Twingo dashpot. The results show that the optimization calculation converges rapidly towards an optimal solution. The future work is to automatically (or semi-automatically) create the addendum surfaces with G¹ continuity for the industrial workpiece with complex geometry.

Keywords:

• Sheet Forming
• Inverse Approach
• Addendum Surface
• Optimization
• RSM
• FSQP

Acknowledgments

The financial support of the State-Region-PMMC to the Project “Design-Opti” is gratefully acknowledged. The authors also thank Professor BATOZ and Associated Professor NACEUR for fruitful discussions and collaborations.