Mitsubishi Heavy Industries Limited

Minoru Arima

Daisuke Ogura

Atsushi Sugai

Yuichi Kaneda

Yu Matsunaga

Shoichi Morimoto

Akihiko Egami

A plate-shaped workpiece forming method of post-machining a pocket () on a curved inner surface of a plate-shaped workpiece () in a state where the plate-shaped workpiece () curved by a curving machine () is spread flat. The method includes a curving step (A) of setting a net curve radius (R) obtained by adding a curve radius contraction amount (R) due to spring-in to a finished curve radius (R) of a plate-shaped workpiece (), taking into account an amount of contraction of the curve radius of the plate-shaped workpiece () between before and after machining of a pocket () due to spring-in, and curving the plate-shaped workpiece () so as to achieve the net curve radius (R); and a pocket machining step of post-machining the pocket () by flatly spreading the curved plate-shaped workpiece ().

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Tokyo, Japan

Minoru Arima