Combined method of spring-forward and spring-backfor die compensation acceleration

摘要

The most key factor in the modern sheet metalprocess is an accurate dimension of final shape part. Theaccurate simulation of the drawing products will not beuseful since springback will occur after the tools areremoved off the drawing die set. One of the mostpromising ways to solve this problem is modify the diesurface as known die compensation. Die compensationis one of the hottest topics in the stamping field.In this paper, a new method to compensate the dietool shape due to elastic deviation is proposed. Thecombination of spring-forward and spring-back methodis applied simultaneously. This method was applied to2D draw bending benchmark problem from Numisheet’93 for verification. The simulation result show that thefinal deformed part is closely to the desired shape part