HIGAI Kazuhiko SHINMIYA Toyohisa YAMASAKI Yuji
A new press forming technology has been developed for closed polygonal cross-section automotive parts to achieve both the weight reduction and the crashworthiness improvement. The developed press forming method can be performed by conventional mechanical press machines. A front side member model of a flange minimizing closed hexagonal cross-section manufactured by the developed press forming method shows high crashworthiness and stiffness in comparison with conventional hat-shape parts, and weight reduction can be achieved by combination of optimizing a cross-section shape and using high strength steel sheet.