Patent ID: 7350388

Claim:
A method for determining a shape of a shift roll for a rolling mill, comprising: a first step of determining a necessary control amount distribution α i 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; a second step of providing a maximum radius difference y A0 of the shift roll; a third step of preliminarily determining a line y i of a roll radius distribution with respect to plate widths, based on the necessary control amount distribution α i and the maximum radius difference y A0 ; a fourth step of shifting the line y i of the roll radius distribution by a maximum roll shift to obtain a distribution Δy Bi of a roll gap change amount with respect to plate widths under the maximum roll shift; and a fifth step of smoothing sharp local changing part of the distribution Δy Bi of the roll gap change amount.