中厚板轧制过程横向厚度的计算方法

Calculation of Transversal Slab Thickness During Plate Rolling

在板坯轧制过程中,由于一些不对称的轧制条件的影响,会使辊系的平衡发生变化,进而影响到轧件的横向厚度分布,使轧件凸度分布异常,出现跑偏现象,最终导致产品的板形不良和尺寸精度变差.基于悬臂梁假设和半无限体假设,同时考虑了工作辊的压扁,开发出可以计算轧件横向厚度分布的影响函数法,通过对轧件的横向厚度的分析和计算,得出了轧件的横向厚度与不对称轧制条件间的定量关系.轧件横向厚度的计算结果对轧制过程中避免侧弯的发生、提高成材率具有重要意义.

In the plate rolling process some asymmetrical rolling conditions may change the balance of roll system and affect the transversal thickness distribution of workpiece, thus resulting in abnormal crown distribution and the workpiece which deviates from normal rolling direction. Eventually, the plate shape will be poor with inaccurate size. Based on the assumptions of cantilever beam and semi-infinite elements with the work roll flattening taken into account, an influence function is derived to calculate the transversal thickness distribution of workpiece. By the calculation and analysis of rolls and workpiece, a quantified relation between the transversal thickness of workpiece and asymmetrical rolling conditions is obtained. Such a calculation of transversal thickness is of significance to avoiding side camber and improving the rate of finished products.