The Study of Effect for Bending Operation Having Working Hardening on Hydroforming Parts

摘要

This study is concerned with working hardening of bending operation on hydroforming parts. Generally, hydroforming parts having the complicated shape of the automobile require a three-dimensional bending operation. This operation involves several variations in the tube, which are the thickness, the mechanical characteristics, the hardness, the circumference and so on, on original tube. The variations and the affect on the hydroforming operation and hydroforming parts are studied. We used two methods, one of which was computer simulation and the other the actual test in the plant. The results of two experiments with several tables and graphs were analyzed.