| 摘要 |
<p>PURPOSE:To control in a short time a distribution ratio of a rolling load quantity by always deciding a formation of a load distribution relation in plural stands containing the final stage, executing a correction of the distribution ratio, and widening successively its control applicable range to the upstream side. CONSTITUTION:A plate material is rolled by a continuous rolling mill, and led out through rolling rolls 1-1', 2-2' and 3-3' of downstream stands #4, #5 and #6. A load quantity is detected by each detector 4, 5 and 6 and led to a load distribution control device 10. First of all, the control device 10 calculates a plate thickness change quantity DELTAh5 from a prescribed expression by using rolling load quantities P5, P6 in stands #5, #6 of the downstream side, outputs draft position changes DELTAS5, DELTAS6 to draft position control systems 8, 9 and makes them coincide with rolling load quantities P5', P6'. Subsequently, the same processing is executed by using rolling load quantities P4, P5 and P6 of three stands #4, #5 and #6 of the downstream side, and the control applicable range is widened successively to the upstream side.</p> |
