| 摘要 |
PURPOSE:To prevent excessive tensile force generated when a steel plate has wound itself round, and to prevent necking, by detecting the quantity of lap of the steel plate stored on a hot-run table, and decreasing a rotating speed of a coiler mandrel in accordance with a prescribed pattern, depending on whether the quantity of lap exists or not. CONSTITUTION:When winding a steel plate in case of hot rolling, the quantity of lap lW up to a prescribed position on a hot-run table 2 is detected by the expression. In the expression, L1, Vs, t0 and t1 denote a distance (m) between a final stand 1 and a steel plate detecting switch 8, a speed (m/second) of a steel plate, a time when the final stand 1 has gnawed the steel plate, and a time when the tip of the steel plate has reached the steel plate detecting switch 8, respectively. A take-up speed is decelerated to a set speed from a leading speed in accordance with a prescribed pattern, from the time when the tip of the steel plate has passed through a prescribed position in front of the coiler when there is no quantity of lap, and so as to absorb the quantity of lap in accordance with the quantity of lap when it exists. |
