| 摘要 |
<p>PURPOSE:To drastically improve the accuracy of thickness control by composing so as to change the automatic thickness control gain of drawing-down system in accordance with the acceleration/deceleration of rolling speed. CONSTITUTION:During rolling with a rolling mill 2, the deviation h of thickness on the inlet side, deviation H of thickness on the outlet side, deviation S of roll gap of a rolling roll 2, and the back tension sigma of a rolled stock 1 are sampled in a data sampling part 3. Next, the ratio Q/M of the plastic coefficient theta to the mill constant M of the rolling mill 2 is calculated based on sampled data and AGC gain when accelerating/decelerating is on-line changed based on the ratio Q/M in an AGC gain arithmetic part.</p> |
