基于多目标优化的冷连轧工作辊窜辊优化控制

Optimal control of work roll shifting in tandem cold rolling mill based on multi-objective optimization

为了解决在高速连续生产中前后两卷带钢规格发生变化时,工作辊在线窜动和工作辊锥形段辊形引起的机组频繁断带问题,基于多目标寻优理论构造了工作辊窜辊多目标函数,计算得到了不同辊形下的最优窜辊区间,提高了轧机边部减薄控制效果。根据工作辊窜辊速度动态补偿控制确定不同轧制力条件下窜辊速度优化控制值,减小轧辊磨损和轴向力影响,保证高速轧制过程的稳定,减少带钢在工作辊窜动过程中产生的断带次数,提高了机组作业率和产品质量。

In order to solve the problem that on-line shifting of work roll and shape of work roll cone section often cause strip breaking when continuous two coils are flying gauge change and the mill is in high speed continuous production.Based on the multi-objective optimization theory,the multi-objective function of the work roll shifting was constructed and the optimal roll shifting interval under different roll shapes was calculated,the edge drop control effect of tandem cold mill was improved.At the same time,according to the dynamic compensation control of work roll shifting speed,the optimal control value of roll shifting speed under different rolling force conditions was determined to reduce the influence of roll wear and axial force,ensure the stability of the high-speed rolling process,reduce the times of strip breaking in the process of work roll shifting,and improve the mill operating rate and product quality.