四辊冷轧机轧辊弯曲和压扁变形的有限元分析

借助Marc有限元软件,采用三维弹塑性有限元法对四辊冷轧机冷轧过程进行了模拟,同时对轧辊变形进行了分析·计算模型中将辊系变形与带钢变形统一考虑,并解决了轧件与辊系之间的耦合问题,避免了采用假定或迭代方法确定轧制力分布时产生的误差·采用逐步收敛的求解过程使计算结果精确、可靠·在不同的轧制条件下,得出了带钢宽度、弯辊力等参数对辊系弯曲、工作辊接触弧上的压扁变形、板宽方向的压扁变形和有载辊缝的影响,为板形分析与控制提供了一种新的计算方法和参考数据·

FEM Analysis for Roll Deformation of a 4-High Cold Strip Mill

By way of three-dimensional elastic-plastic finite element method based on the FEM software Marc, the strip cold rolling process on a four-high strip mill is modeled to analyze the roll deformation. In the model the deformation of both roll and strip are considered as a whole, so as to resolve the coupling problem between them, and avoid the errors due to iterative processor assumption of the distribution of rolling force. A step-by-step convergent solution is thus introduced to the calculation to provide accuracy and reliability. The effects of strip width, roll's bending force, etc., on such roll deformation as bending and arc/lateral flattening, and the gap between loading rolls are obtained with different rolling parameters. The new calculation method and reference data will offer an efficient way for analysis and control of the shape.