Kawasaki Steel Corporation

Takayuki Kaji

Kazuya Asano

Masayuki Onishi

Katsuhiro Takebayashi

Saburo Moriwaki

Hiroshi Nomura

Hiromitsu Yamanaka

Motoji Shiozumi

Akinobu Kamimaru

Mototatsu Sugizawa

Kazuo Arai

Yuki Nabeshima

Junichi Tateno

Shuji Tanaka

Takushi Kagawa

Hiroshi Shiomi

Satoshi Tsuzuki

Chikara Osaka

Masashi Hoshino

Masaki Takashi

Michio Ibaraki

During rolling with a rolling mill, which includes a sheet shape altering device capable of altering a mechanical sheet crown, while the sheet shape altering device is operated correspondingly with a target mechanical sheet crown set value during the dimensional alteration in rolling, the invention enables a stable sheet shape to be achieved, even when the mechanical sheet crown is altered to a large extent during rolling. Specifically, the target mechanical sheet crown set value, during the dimensional alteration in rolling, is previously set based on target mechanical sheet crown set values, before and after the dimensional alteration, prior to start of the dimensional alteration in rolling. The sheet shape altering device is then operated so that an actual mechanical sheet crown, during the dimensional alteration in rolling, is equal to the target mechanical sheet crown set value during the dimensional alteration in rolling.

Method and apparatus for controlling sheet shape in sheet rolling

A method of controlling a form of a strip in a rolling mill. A plurality of paired data of manipulation amounts of form control actuators, and amounts of variations in the form of the strip corresponding to the manipulation amounts are prepared, as prototype manipulation examples. Calculation is performed to obtain a degree of similarity between an actual form error representing difference between an actual form of the strip and a target form, and variations in the form of the prototype manipulation examples. Then, actuator manipulation amounts of the prototype manipulation examples are weighted in accordance with calculated degree of the similarity, and the actuators are manipulated based on weighted actuator manipulation amounts.

Method of controlling form of strip in rolling mill

Molten metal level control method and device for continuous casting

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Chiba, Japan

Takayuki Kaji