Optimization of Stamping Process Parameters

Abstract

Stamping is one of the significant sheet metal forming processes which is used for producing components especially in the automobile industry. Sheet metal flow into the die cavity occurs the applied force in the stamping process. While the extreme compressive stresses of sheet metal end up with wall thickening, tensile stresses lead to thinning problems in the wall zone of the part. The excessive thinning may cause crack formation or fracture of the metal sheet. This faulty process design eventually produces non-conforming products. In order to have a successful design of the stamping process, designing tooling and identification of the optimum level of the process parameters are needed. In this regard, the present paper is an attempt to set the stamping process parameters for minimum thinning of blank and optimal results by a stochastic search method (modified Differential Evolution) based on multiple nonlinear regression analysis. The results have been compared with the results of those of the previous study. It is shown that the current results show that the present optimization study is successful as it further increases the thickness.