Analysis of 3-Dimensional Deformation of Cold Rolled Strips Considered Frictional Anisotropy and Elastic Deformation of Strip at Exit

摘要

A new numerical calculation model of 3-dimensional deformation of a cold-rolled strip by the slab method is presented. In this model, effects of elastic deformation of the strip at the exit and frictional anisotropy between the roll and strip have been integrated into the previous model. The results calculated using the present model agreed with those obtained by elasto-plastic FEM and with experimental data obtained using a model cross mill. Furthermore, it was found that the elastic deformation of a strip at the exit has an important effect on strip flatness, but not on thickness profile, and edge-drop of the strip becomes short when the frictional anisotropy becomes large. It is thus concluded that the present model is very useful for 3-dimensional deformation analysis of a strip not only in cross rolling but also in general parallel rolling.