Geometrical Springback Compensation Algorithm Based on UV Curves for Automobile Structure Parts Die-Face

Abstract

Springback is the most common defect in sheet metal forming. The compensation method is an effective way to overcome this defect by modifying the die-face. A new geometrical springback compensation algorithm based on UV curves is proposed for automobile structure die-face. The UV discrete technology and space lattice search approach are adopted to get the regular springback lattices from irregular and unordered springback points. The compensation direction and the correction of the pressing direction are considered. The die-face is reconstructed with a high order BEZIER spline surface on the CATIA platform. The high quality geometry compensation die-face obtained from this algorithm can be applied directly in actual machining. The geometry springback compensation of a high strength steel structure part is used to verify the effectiveness of the algorithm.