| 摘要 |
<p>PURPOSE:To remarkably reduce variation in width of a coil, to advantageously deal with the requirement of width change in the same coil and to control the finished width only by information on the upstream side of rolling line. CONSTITUTION:In cold tandem rolling, the effect of rolling speed and tension between stands that affects on fluctuation in width of material to be rolled of every kinds of steel and every thickness is preliminarily determined as relation shown by the formula 1. When rolling speed is varied, the adequate ratio of variation of tension that the fluctuation rate of width falls in a specified range is calculated based on the formula 1 and tension between stands is controlled according to this calculated value. B=a0+a1XVr+a2XTs... 1. Where, B: rate of fluctuation in width, Vr: rolling speed, Ts: ratio of variation of tension between stands, a0, a1, a2: constant that are decided in accordance with kinds of steel and thickness.</p> |
