宝钢某连续退火机组平整机控制技术

来源期刊：冶金自动化2011年第1期

论文作者：李东江 陈启军 王国民

文章页码：51 - 55

关键词：平整机； 张力控制； 轧制力控制； 延伸率控制

Key words：temper mill； tension regulation； rolling force control； elongation control

摘    要：宝山钢铁股份有限公司某连续退火机组采用双机架平整工艺,以延伸率控制为核心,通过调节张力或轧制力来实现延伸率的稳定。延伸率采用闭环控制,为提高实际延伸率的计算精度,在高速和低速两种不同的情况下,采用不同的方法进行计算。张力调节器的输出乘以一个比例系数,作为上游设备速度给定的张力前馈补偿,以减小动态过程中带钢张力的波动。轧制力控制采用轧制力外环、位置内环的双闭环结构,提高了系统的动态性能和抗干扰能力。实际应用结果表明,这套平整机控制技术确保了机组质量和通板的稳定性,能够满足薄板高速生产的要求。

Abstract: A two-stand temper mill is used in one of the continuous annealing processing lines of Bao-shan Iron & Steel Co.,Ltd.to control technologically the elongation of coils.The closed-loop elongation control is achieved by regulating tension or rolling force.To improve accuracy of control,different elongation calculation methods are applied to cope with high speed and low speed cases.Feed-forward compensation signals proportional to the output of tension regulators are superimposed to the speed references of upper stream speed regulators to alleviate tension deviation during the transient.To improve its dynamic performance and anti-disturbance ability,the rolling force control adopts the cascade control,in which the inner loop is responsible for position control while the outer loop performs rolling force regulation.Practical application results show that product quality and yield are stable and the control scheme meets the need of high-speed thin-strip production.