| 摘要 |
<p>PURPOSE:To keep the rolling load distribution for each stand at a specified proportion, and to improve the accuracy of thickness, by installing a load redistribution controller and a set-up computer in the controlling system for the multistage hot finishing mill. CONSTITUTION:When the material S approaches the stand F1, the set-up computer 62 forecasts the rolling load of each stand F1-F7, the forward slip of the rolled material against the rolling roll, etc., and determines the roll gap and the roll speed. At the same time, various rolling conditions of each stand F1-F7 are transmitted to the load redistribution controller 61. Then, when the material S is bitten by the stands successively from F1 to F7, the RF.AGC unit 58 and the thickness detector 60 fairly control the thickness and shape of the rolled material S referring to their initial values on the run-out side of the mill. Hereupon, the rolling load of each stand is stored as the initial load distribution pattern in the load redistribution controller 61, and the RF.AGC unit 58 calculates the roll position adjustment for each stand referring to this initial load distribution pattern. Thus calculated roll position adjustment is inputted to the automatic roll position setter 53 in accordance with the travel of rolled material S through the stands from F1 to F7, and hereby, the roll position is repeatedly adjusted.</p> |
