| 摘要 |
<p>PURPOSE:To stabilize a continuous rolling control by detecting actual rolling time of travelling rolling material and by calculating a deviation with the set value of changeover timing also by correcting in order the rolling reduction of each stand. CONSTITUTION:A detector 16 is arranged among each stand No.1-4 and the front and rear ends of a rolling material 2 are detected. A pass time detecting circuit 14 detects an actual rolling time from each output signal of the detector 16 and accepts the set value of a timing setting device 9 for switching speed reference and detects the deviation in timing. The detected value thereof is then inputted into arithmetic circuit 13 for correcting rolling reduction. The arithmetic circuit 13 calculates the rolling reduction of a rolling roll 1 corresponding to each timing deviation, corrects the rolling reduction given in advance and rolls the material 2 with changing the roll gaps. By this method unstable factors based on the front and rear end controlling are removed and a stabilized continuous rolling control is enabled.</p> |
