A New Concept on Stamping Die Surface Compensation

This paper classifies existing die compensation methods into two general categories, geometry-based method and springforward method. To meet the challenge of increased application of AHSS and its associated severe springback problems, we propose a new concept by using the tooling mesh of design intent as reference during compensation iterations. Incorporation of this concept into these two original methods enhances the efficiency and accuracy of compensated die surface. The enhanced geometric method minimizes the “wrinkle” effect caused by traditional methods done on the blank mesh. The enhanced springforward method improves the convergent rate to a specified tolerance. The proposed scheme can start compensations on a die with either design intent surfaces or already modified surfaces. It is also capable to incorporate actual panel scan data into compensation process to achieve high compensation accuracy.