Honda Motor Co., Ltd.

Takayuki Egawa

Yuichi Nagai

Kenzo Takeda

Hideo Meguri

In a press working apparatus, while a servo motor is acting, an upper die is made to come close to a lower die and press working of the first time is conducted on a steel plate. A slider is raised to a movable punch preparation position. A movable punch is protruded from a die face of the upper die by width and locked by a mechanical lock. The upper die is made to come close to the lower die again and the steel plate is pushed with the upper die and at the same time an additional worked portion is pushed and deformed with the movable punch so as to conduct press working of the second time. After the movable punch has been retracted, the slider is raised.

Press working method and press working apparatus

In a press working apparatus, while a servo motoris acting, an upper dieis made to come close to a lower dieand press working of the first time is conducted on a steel plate. A slideris raised to a movable punch preparation position. A movable punchis protruded from a die faceof the upper dieby width H and locked by a mechanical lock. The upper dieis made to come close to the lower dieagain and the steel plateis pushed with the upper dieand at the same time an additional worked portionis pushed and deformed with the movable punchso as to conduct press working of the second time. After the movable punchhas been retracted, the slideris raised.

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Tochigi, Japan

Takayuki Egawa