| 摘要 |
<p>PURPOSE:To contrive quick and sure detection of a mis-roll of whole rolling stands with trucking control device by arranging rolling stock detectors between upstream and downsteam stands successively and detecting a rolling speed, rolling load and current of a mill motor. CONSTITUTION:Trucking control device 32 decides the mis-roll after a predicted time by the presence or absence of detecting signal from the second rolling stock detector 14. But if the decision is not performed by the detector 14, at the time of realizing the conditions, those are to say, a rolling load of the (i+1)-th stand 10i+1 and the mill motor current of the mill motor 28 detected by an ammeter 30 at the (i+1)-th stand 10i+1 are below reference values obtained previously by a pass schedule, the misrol is decided. Based on this decision, a signal of stop command is outputted to the upstream side mill motors 28, 18 of the second rolling stock detector 14 and a corps cut command is outputted for an upstream shear.</p> |
