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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 750mm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2.64IU,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。
Bending force setting is critical to the plate shape control during high speed cold tandem rolling. Aiming at the characteristics of the equipment and technology of a 1 750 mm tandem cold mill, the influence of bending force setting on the finished strip shape was calculated and analyzed. The effects of strip width, unit rolling force, intermediate roll shift, strip inlet thickness, strip crown, roll diameter and roll crown on the optimal roll bending force are studied in depth. Through a large number of statistical analysis and theoretical calculation, using Origin software for multiple regression fitting, finally set up the calculation model of optimal bending force in cold tandem rolling process. The maximum deviation of the bending force calculated by the new model is less than 3.14%. The average standard deviation of the strip shape of finished strip is reduced to 2.64 IU. The new model can obviously improve and control the strip strip shape quality. Practice has proved that the bending force model has high shape control accuracy and good shape control stability, suitable for industrial production.