Mitsubishi Heavy Industries Limited

Yu Matsunaga

Atsushi Sugai

Takeshi Yamada

Daisuke Ogura

Akira Kono

Yuichi Kaneda

Suguru Kondo

Takeshi Hoshino

Shota Hosoi

Satoshi Kamata

Minoru Arima

Akihiko Egami

Shoichi Morimoto

A workpiece processing method includes: a section roll forming step of subjecting a flat plate shaped workpiece to forming to impart a prescribed cross-sectional shape thereto; a solution heat treatment step of subjecting the workpiece, after the section roll forming step has been performed, to solution heat treatment; a contour roll forming step of subjecting the workpiece, after the solution heat treatment step has been performed, to forming to bend the workpiece into an arcuate shape; and a stretch forming step of subjecting the workpiece, after the contour roll forming step has been performed, to forming to impart a curved shape, following a curved surface of a die, to the workpiece by bringing the workpiece into contact with the curved surface and inputting a tension load to the workpiece.

Workpiece processing method and processing device

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 ().

Plate-shaped workpiece forming method

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Tokyo, Japan

Yu Matsunaga