| 摘要 |
<p>PURPOSE:To prevent lateral curvature of a rolled steel sheet, by arranging a load- detecting roll on the downstream side of each rolling stand, and by controlling the screw down device while detecting the difference of the loads applied on both ends of the load-detecting roll. CONSTITUTION:When a curvature is formed in a hoop 2 while it is cold rolled through many roll stands 5 because of the rigidity difference or gap difference of rolls on right or left side, or lateral difference in deformation-resistance of the hoop, the center of the hoop slips out of the center of the detecting roll 7, so that load difference is shown by a load meters 8, 8' installed at both ends of the detecting roll. The load signals are fed to a load difference arithmetic unit 12, where the load difference is computed and the rolling reduction is calculated through a rolling reduction arithmetic unit 13. Corresponding to the positive or negative rolling reduction, operation signals for hydraulic pump 11', 11 are given from a rolling-reduction- control unit 14 so as to operate the respective screw down devices 9, 9', whereby the curvature of the billet is corrected.</p> |
