热连轧机轧制力和轧制力矩模型研究

研究了一种适用于热连轧机的新型高精度轧制力和轧制力矩模型,建立了一个轧制力功系数和轧制力矩功系数的新型指数公式,将两个系数的表达式统一起来,仅含"压下率"和"压扁半径与出口厚度之比"两个影响因子,形式简洁,物理意义明显.给出了新型指数公式中待定参数的确定方法,求得的待定参数值对不同钢种和不同精轧机架具有通用性.预测实践表明,新型轧制力和轧制力矩模型提高了热连轧过程中轧制力和轧制力矩的预报精度,可用于热轧板带生产线精轧机架的在线控制.

Modelling Rolling Force and Rolling Torque in a Hot Strip Mill

A new model for a type of rolling force and rolling torque for finishing stands of a hot strip mill was investigated. A new formula unifying rolling force and rolling torque coefficients was used to simultaneously model rolling force and rolling torque. Its physical meaning is readily understood, and it involves only two impacting factors, namely reduction rate and the ratio of flattening radius to exit thickness. A method is provided for obtaining unknown parameters in the new formula. The parameter values obtained are universal for different steel grades and different finishing stands. Simulation and experimental results show that the new model improves prediction accuracy of rolling force and rolling torque and can be used in online control in a hot mill strip rolling process.