Toyota Jidosha Kabushiki Kaisha

Kabushiki Kaisha Toyota Chuo Kenkyusho

Kabushiki Kaisha Kobe Seiko Sho

Shinichiro Nakamura

Takashi Hosoe

Akihito Sato

Yutaka Suzuki

Hiroki Nakajima

Kimikazu Ikemoto

Kuniaki Matsui

Atsunobu Murata

Yoshirou Tomioka

Masaru Adachi

Yuzo Kawakami

Tsuneharu Mori

A sheet forming method including the steps of: holding a blank between a blank holder and an opposing die so that wrinkling is prevented in the blank; and forming the blank to an objective shape with a punch, while imposing a force of a variable bead on the blank at a selected position in a point manner and only during a part of the entire forming period selectively. An apparatus for conducting the above method.

Method and apparatus for sheet forming a blank using a variable bead

A method of effecting press working on a blank, in which a local portion of the blank is strengthened prior to the press working, so as to achieve increased mechanical strength, due to structural transformation of the material of the blank, or by an embossing operation. The local portion is selected so that the blank exhibits improved formability and suffers from reduced fractures during the press working.

Press working method including step of strengthening local portion of

The object of the present invention is to provide an aluminum plate for fabrication which has an excellent formability, easy degrease after fabrication, coating properties, and less tendency of flawing, in which the aluminum plate for fabrication which is plated, and coated with a lubricant containing (A) a fatty acid ester of polyol, (B) an alkaline or alkaline metal salt of sulfonate, and (C) a controlling agent, and having saponification value of 20 or more.

Aluminum plate excellent in formability

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Nagoya, Japan

Shinichiro Nakamura