二十辊轧机轧制力动态预设定模型研究

针对某厂二十辊森吉米尔轧机生产不锈钢时存在非稳态过程轧制力设定偏差较大,带钢厚度超差段较长的问题,建立了摩擦因数数据库,采用迭代反算方式计算摩擦因数并存于数据库,在轧制力计算时提供摩擦因数;然后在机组原有ALSTOM轧制模型及Bland-ford公式的基础上,考虑了弹性区和温度变化的影响,建立了轧制力动态预设定模型,可在AGC投入前进行动态计算,时间间隔为1.5s;设定结果与实测数据比较表明,相对误差基本在±3%以内,厚度偏差2%以上的长度控制在5m以内,实现了森吉米尔轧机生产不锈钢时轧制力的精确设定。

Study on dynamic pre- setting model of rolling force for 20- high mill

For the production of stainless steel in 20- h Sendzimir mill,there are problems that the setting deviation of the rolling force is large in the unsteady stage and the length of thickness fluctuation of strip is longer.The friction coefficient database was established,and the coefficient of friction was calculated by the iterative inverse method and stored in the database.It was provided in the calculation of rolling force.Based on the Bland- ford formula and considering the influence of elastic zone and temperature change,the dynamic pre- setting model of rolling force was established by absorbing the original ALSTOM rolling model.Dynamic calculation could be made before the AGC was put into operation and the interval was 1 s.The comparison between the setting result and the measured data suggests that the relative error is less than ±3%,the length whose thickness deviation is more than 2% is controlled within 5 meters,and the precise setting of rolling force during the production of stainless steel in Sendzimir mill is achieved.