Ultra high strength steels(UHSS)are widely used to fill the needs of lightweight part for automobile, and the control of springback is very importment factor in sheet metal forming using UHSS. In this study, to lighten the Reinf s/side outer panel whi...
Ultra high strength steels(UHSS)are widely used to fill the needs of lightweight part for automobile, and the control of springback is very importment factor in sheet metal forming using UHSS. In this study, to lighten the Reinf s/side outer panel which is normally manufactured using 600~800Mpa steel sheet,new design of the manufacturing process for Reinf s/side outer panel using SPFC980 has been proposed. To accomplish this goal, the influence of process variables sush as die corner radius and die wall angle on the spring back Amount of Calibration were investigated using Auto-form Analysis. In order to insure the validity of Auto- form, the spring back Reliability Evaluation results of Auto- form Analysis was verified with press dies product.