| 摘要 |
<p>PURPOSE:To always keep the constant roll gap of the upper and lower work rolls, and to manufacture the product with uniform size, by remotely adjusting the screw down device for keeping constant the roll gap of a pair of work rolls independently of the presence of the rolled material in one strand, and by controlling the roll gap of the upper and lower work rolls according to the position of the rolled material. CONSTITUTION:The condition that two materials are being simultaneously rolled is changed to a condition that the material 1 on the operating side is absent, for example; in this case, the gap of the work rolls 3, 4, becomes inclined as shown by the full line 11. That is, since the roll gap Sdw, on the driving side performing the rolling work, becomes Sd, the tip and the tail positions of the rolled material 1 on the operating side are always traced, and at the same time as the tail end of the rolled material 1 passes over the rolls 3, 4, the roll gap is adjusted so as to be the dotted line 12 by controlling the screw down devices on both of the operating side and the driving side; hereby, the roll gap on the driving side for performing the rolling work is made Sdw. That is, the roll gap is widened by Sw obtained from the formula. Next, at the same time as the tip of the rolled material 1 is bitten, the roll gap is closed by Sw, and hereby, the rolling strand gap on the driving side can be kept constant independently of the presence of the rolled material at another strand. In the illustration, the figure 2 shows the rolled material on the driving side.</p> |
