Die Compensation Design for Stamping a High Strength Automotive Bumper Inner

Abstract

Due to the requirement of lightweight in the automotive body structure design, the application of advanced high strength steel (AHSS) has been widely adopted in the automotive industry. However, the technical difficulties are also experienced in the forming process of stamping the advanced high strength steel. One of the major defects is springback. In this study, both the experimental approach and the finite element analysis were adopted to examine the springback phenomenon occurred in the stamping of a front bumper inner made of 590Y advanced high strength steel. The die compensation approach was employed to adjust the amount of springback to make the dimension of the automotive part conforming to the design specification. The accurate dimension of the production part validates the finite element analysis and the die compensation approach adopted in the present study provides a useful guideline for improving the springback defect in the stamping of advanced high strength steel sheets.

Experimental Investigation of Springback of Locally Heated Advanced-High Strength Steels

“…In another study done by Chen, both the experimental approach and finite element analysis have been used to examine the amount of spring-back that occurs in shaping a front bumper interior made of advanced high-strength steel. Different die designs have been used to ensure that the size of the automotive part conforms to the design specification and to adjust the amount of spring-back [10].…”