镁合金单机架四辊轧机板形控制模型研究

目的 研究单机架四辊轧机的前后平均张应力，以板形判别因子为目标函数构建单机架四辊轧机板形控制理论模型，确定卷曲后张力值。方法 通过耦合板形标准曲线模型以及设定辊系弹性变形、热凸度模型和卷曲张力模型，提出了单机架四辊轧机板形控制理论模型的计算方法，并对该计算方法与模拟实验结果进行对比验证。结果 该计算方法对轧后板材的断面横向厚度有较好的预测作用，与有限元模拟结果相比，规律一致性良好，但计算方法最大误差出现在板材边部，误差最大为0.024 mm。结论 提出的单机架四辊轧机板形控制模型计算方法实现了镁合金板形预判，对提高镁合金板形质量起到了重要的指导作用。

Shape Control Model of Magnesium Alloy Single-stand Four-high Mill

The work aims to study the average tensile stress in front and behind the single-stand four-high mill to build a theoretical model for shape control of the single-stand four-high mill with shape discrimination factor as the objective function, so as to determine the tension value after curling. By coupling the standard curve model of shape and setting the rolling elastic deformation, thermal convexity model and curl tension model, the calculation method for shape control theoretical model of single-stand four-high mill was proposed, and the calculation method was compared with the simulation experimental results for verification. The calculation method had a good prediction on the cross-sectional transverse thickness of the rolled plate, and the regularity was good compared with the finite element simulation results, but the maximum error of the calculation method occurred at the edge of the plate, reaching a value of 0.024 mm. The calculation method proposed for the shape control model of the single-stand four-high mill realizes the prediction on the shape of magnesium alloys, and plays an important guiding role in improving the shape quality of magnesium alloys.