Ishikawajima-harima Heavy Industries Co., Ltd.

Masayoshi Sato

Kazuyuki Sato

Hisashi Honjou

Masahiro Kuchi

Hisashi Honjo

A method for determining a shape of a shift roll for a rolling mill, includes the steps of determining a necessary control amount distribution &#x3b1;for a plate crown with respect to plate widths, based on a distribution of the number of plates rolled by a target rolling mill with respect to plate widths, and providing a maximum radius difference yof the shift roll. The method further includes the steps of preliminarily determining a line yof a roll radius distribution with respect to plate widths, based on the necessary control amount distribution &#x3b1;and the maximum radius difference y, shifting the line yof the roll radius distribution by a maximum roll shift to obtain a distribution &#x394;yof a roll gap change amount with respect to plate widths under the maximum roll shift, and smoothing sharp local changing part of the distribution &#x394;yof the roll gap change amount.

Method for determining shape of shift roll for rolling mill

There are provided an even number of paired roll-shift type rolling mills 12a, 12b and a controller 16 for controlling the rolling mills 12a, 12b. Each of upper and lower work rolls 13 of each of the roll-shift type rolling mills has a predetermined crown curve and has a roll shifting mechanism 14 for axially shifting the upper and lower work rolls relative to each other. The controller 16 determines a shift amount of each rolling mill in order to obtain a predetermined cross section shape of a steel plate, shifts the work rolls of the rolling mill on the upstream side paired every rolling coil to thereby disperse wear on the roll surface, and moves the work rolls of the rolling mill on the downstream side of the pair in a predetermined direction by the same distance, thereby canceling the change in the cross section shape of the plate caused by the shifting operation for the wear dispersion.

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Chiyoda-ku, Japan

Masayoshi Sato