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与四辊轧机的板形预报问题相比,六辊轧机的未知量更多,计算速度更慢。为此,将模型耦合法拓展到六辊轧机,建立相关的带材塑性变形模型与辊系弹性变形模型的线性方程组。考虑到板形问题的输入参数中通常并不包含空载辊缝值,根据带材出口平均厚度已知的条件提出一个新的线性方程,将空载辊缝值纳入到未知量中,提高了模型耦合法的适用性。两个计算实例表明,六辊轧机板形快速预报的模型耦合法的计算结果与松弛因子法吻合良好,但可使计算速度提高100倍左右。
Compared with the shape prediction of four-high mill, the six-high mill has more unknowns and slower calculation speed. To this end, the model coupling method is extended to a six-high rolling mill to establish a linear system of equations related to the strip plastic deformation model and the roll elastic deformation model. A new linear equation is proposed based on the known condition of the average thickness of the strip exit taking into account that the input parameters of the plate form usually do not include the no-load roll gap, Applicability of model coupling method. The two calculation examples show that the model coupling method of six-high mill plate shape prediction is in good agreement with the relaxation factor method, but the computational speed can be increased by about 100 times.