2050mm精轧开轧零点偏差模型补偿

Zero Deviation Compensation for Initial Rolling of the 2050 mm Hot Mill

宝钢分公司一热轧生产线于2005年实施了精轧基础自动化改造,改造后出现了开轧前5块带钢精轧模型设定偏差大、产品尺寸超差多的问题。通过对弹跳方程的分析,发现了开轧模型设定偏差大的原因在于过程机使用的弹跳曲线和轧机实际刚度曲线存在一定偏差,为此对开轧零点修正系数进行优化。该措施解决了2 050 mm产线开轧机架设定偏差的问题,杜绝了开轧前5块带钢的尺寸超差,并在2 050 mm产线精轧模型中得到长期应用。

The finisher＇ s basic automation reform of Baosteel Branch＇ s No. 1 hot rolling mill was carried out in 2005. After the reform some new problems appeared, including the unsuitable setting of the finish rolling model for the first five strips, which caused the out of tolerance in product size. Through analyzing the bounce equation, it was found that the deviation of the model setting was due to the difference between the bounce curve used by the process control computer and the actual rigidity curve of the mill. In order to overcome this deviation, the system＇ s zero correction coefficients were optimized. After the optimization, the deviation problem was solved and the oversize of the first five strips was eliminated. These optimized coefficients have been used for a long time in the finish rolling model of the No. 1 hot rolling mill.