| 摘要 |
<p>PURPOSE:To improve the accuracy in the plate thickness of a rolling material by controlling the rotary speed of a reel driving motor by the tension variation correcting signal that the periodical tension variation per one turn of a reel is added to the rolling material detection tension existing between a rolling mill and its both inlet and outlet reels. CONSTITUTION:The tension detected by the tension detecting device 7 of the strip 1 located between a rolling mill 3 and the inlet and outlet sides reel 4 existing before and behind thereof is inputted into a tension correcting device 8. The positional signal per one turn of the reel detected by a reel turning position detector 6 is inputted to the tension correcting device 8, converted into a tension variation, the tension variation correcting signal varying on each one turn of the reel is outputted to a motor control device 9 by the tension correcting device 8 and the rotary speed of a reel driving motor 5 is controlled. Consequently the rolling plate thickness accuracy of the strip 1 can be made higher.</p> |
