| 摘要 |
PURPOSE:To reduce the fluctuation in the tension and the fluctuation in the height of loop on purpose to manufacture the strip of high accuracy, by providing the speed correction circuit, and by correcting and changing the quantity of slack of the strip as far as the quantity of speed change equivalent to the difference between the quantity of slack of strip and the quantity of reference slack, and by correcting the influence of the impact drop. CONSTITUTION:The multipliers 14, 15, induce the quantity of slack due to the impact drop. The multiplier 14 operates the value of rolling torque X threading speed of strip, and the multiplier 15 operates the value of fixed coefficient X output of multiplier 14. The subtracter 16 induces the result of subtraction of the quantity of slack due to the impact drop from the output of the operator 13 for the quantity of reference slack. The speed command signal generator 17 raises the speed so far as the quantity of correction of speed. The reduction roll controller 18 receives the signal from the speed command signal generator 17 and raises the speed of the reduction roll in the stand. Above stated performances are described for the case of the hot strip mill, however, they can be applied to other rolled materials manufactured by employing the looper. |
