2050mm热轧精轧活套附加主传动速度分析及改进

Analysis and improvement of the looper's additional master speed in the 2050 mm hot rolling mill's finishing area

热连轧过程中,活套的作用是保证机架间的流量平衡和调节机架间的张力平衡。宝钢2 050 mm热轧精轧采用的是恒张力控制的电动活套,一方面通过机架间套量的变化调节前面机架的主传动速度,维持机架间的套量,保证机架间的秒流量相等;另一方面,通过活套自身的电流调节(力矩)维持机架间的张力不变。在介绍2 050 mm热轧精轧活套附加主传动速度的控制组成及作用的基础上,结合实例分析目前2 050 mm热轧精轧附加主传动速度存在的问题。提出头部穿带时,采用活套附加主传动速度调节快的方式,基本达到稳定套量时,再选择活套附加主传动速度调节慢的方式。通过这种组合控制,既可以防止机架间张力过高,又可在一定程度上提高轧制过程的稳定性,保证产品质量。

The function of the looper in the hot rolling mill is to balance the volume and adjust the tension between the stands. Baosteel 2 050 mm hot rolling mill uses the electrical looper. Firstly, the front stand＇s additional master speed can be adjusted to maintain the strip stock and ensure the volume stable, and then it can be adjusted to ＂slow-down＂ to maintain the tension between the stands. On the basis of the control and action of the additional master driving speed of the looper in the finishing area of the 2 050 mm hot rolling mill, and in combination with some examples, the paper analyzes all the problems concerning the current additional master driving speed. During the period of strip head into the stand, a mode of adjusting the speed to ＂fast＂ is used, once a stable stock is reached, a mode of adjusting the speed to ＂slow＂ is chosen. With this combined control, higher tension between stands can be prevented, the rolling stability and product quality can be guaranteed.