冷连轧过程弯辊力模型研究与开发

弯辊力设定对高速冷连轧过程的板形控制至关重要。针对某1 750 mm冷连轧机组的设备与工艺特点，计算并分析了弯辊力设定对成品带钢板形的影响规律。深入研究了带钢宽度、单位轧制力、中间辊横移量、带钢入口厚度、带钢凸度、轧辊辊径和轧辊凸度等因素对最优弯辊力的影响。通过大量统计分析和理论计算，利用Origin软件进行多元回归拟合，最终建立了冷连轧过程最优弯辊力的设定计算模型。采用新模型设定计算弯辊力的最大偏差小于3.14%，成品带钢的板形标准差平均值降至2.64 IU，新模型对成品带钢板形质量的控制有明显改善和提高。实践证明：该弯辊力模型具有较高的板形控制精度和较好的板形控制稳定性，适合于工业生产。

Study and development on models of bending force for tandem cold rolling process

Setup calculation of bending force plays the key role in the shape controlling for the process of tandem cold rolling with high rolling speed.Aiming at a 1 750 mm tandem cold rolling mills and the processing characteristic of strips rolling,the influence rule on strip shape for the setup of bending force was calculated and analyzed.Also,the influence rule on the optimum bending force for some factors was deeply researched,which contained strip width,specific rolling force,the setup of transverse shift of intermediate roll position,entry strip thickness,strip crown,roll diameter and roll crown.Through a large number of statistical analysis and theoretical calculation,using the multivariate regression fitting,the computing model on the setup of optimum bending force was finally established.Using the new model to set bending force,the maximum deviation of bending force was less than 314%,and the standard deviation distribution of strip flatness for finished product was reduced to 2.64 IU.The control of the new model on strip shape was obviously improved.The application results showed that the model on bending force was provided with high accuracy and good stability of shape control,also was suitable for practical production.