Abstract
Optimization design for polygon blank shape has strong practical value, which can improve sheet metal forming performance and save material. Response surface method is presented to determinate the optimum polygon blank shape, which can enhance the efficiency of optimization design. In order to improve the precision of surrogate model for nonlinear engineering problem, instead of quadratic polynomial, support vector regression is used to build response surface. This method is demonstrated to be correct and efficient by successful optimization design for an automobile side wall inner top panel. The risk of cracking and wrinkling are obviously decreased after optimization. The blank area is also reduced by about 8.7 % after optimization. This method can advance the intelligent degree and process of die design, furthermore, reduce the production cost.
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