Sango Co., Ltd.

Osamu Nishihara

Yoshiki Ito

Jiro Kagitani

A press forming method for producing a saddle type final product comprises a first process of producing an intermediate product having a processing adjustment section, by cold press working against an ultrahigh tensile strength steel plate, to deform the side wall portions and flange portions at both sides in the predetermined area, with the cross section of the top plate portion being maintained in a predetermined shape, and a second process of pressing at least the processing adjustment section, by cold press working against the intermediate product, with the cross section of the top plate portion being maintained in the predetermined shape. In at least one of the first process and second process, a processing target of the at least one process is bent in the direction opposite to the opening of the hat-shaped cross section, to produce the saddle type final product.

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Miyoshi, Japan

Osamu Nishihara