| 摘要 |
<p>PURPOSE:To enhance the meandering controlling capacity and to avoid the abnormal operation of control by starting the control when a reducing amount of the upstream looper tension exceeds a preset value. CONSTITUTION:A looper tention T is obtained in a looper tension arithmetic device 12 based on looper loads P3W, P3D on the operating and driving sides detected by looper load detectors 6a, 6b mounted on an upstream looper 3. In a logical decision circuit 11, when the reduced amount (To-T) of the looper tension >= a set value is established from a locked on upstream looper tension To and a present time upstream looper tension T, a control start timing switch 13 is changed over and a meandering control of a meandering control rolling mill 1 is started.</p> |
