| 摘要 |
<p>PROBLEM TO BE SOLVED: To execute cold rolling of a hot rolled band-shaped sheet before pickling with deposited scale into a favorable shape. SOLUTION: A numerical formula model is previously formed to indicate a difference of elongation percentage of a plurality of spots at different distances from the side edges to the center of the width of the sheet, and taking up actully measured values of continuous measurement of rolling load as variables, based on the numerical formula model, a control amount of an intermediate roll bender 1 and/or a work roll bender 2 is calculated and adjusted so that the difference of elongation percentage may coincide with a target value. In the case that thus calculated control amount of the intermediate roll bender 1 or the work roll bender 2 is deviated from the maximum value or the minimum value in the range of specification, the maximum value or the minimum value is taken into the numerical formula model, and then a control amount of the other work roll bender 2 or the intermediate roll bender 1 is calculated.</p> |
