| 摘要 |
<p>PURPOSE:To improve the control accuracy by installing the 1st and 2nd plate crown correcting means, setting a value of the 2nd correcting means, and controlling plate crowns by the 1st correcting means based on the initial setting value after plate passing. CONSTITUTION:VC rolls 32a and 32b as the 2nd plate crown correcting means are installed on work rolls 31a and 31b of stands 2-4 and actuators 37, 47, and 57 are set on one end of those stands, respectively. Increase benders 35 and decrease benders 36 as the 1st crown correcting means are set on every work rolls. Correction values are set by the VC rolls 32a and 32b before plate passing and the crown control of the work rolls 31a and 31b is accurately performed by a combined control of the benders 35, 36 and the VC rolls 32a, 32b after plate passing. Thus, the crown control accuracy is improved before and after plate passing.</p> |
