An investigation into the plastic deformation behavior at the roll gap during plate rolling

摘要

A mathematical model using the dual-stream function method under cylindrical coordinates has been proposed to investigate the position of neutral point and the plastic deformation region at the roll gap during plate rolling. The profile of widthspread is assumed to be a quadratic function of the cylindrical angle. The rigid-plastic boundary at the entrance of the roll gap is considered to be inclined to the rolling direction. The velocity fields derived from the proposed dual-stream function can automatically satisfy the volume constancy and the velocity boundary conditions within the roll gap. Experiments on plate rolling using aluminum sheets meshed by electrochemical etching were carried out. The predicted profiles of width spread and theplastic flow pattern at the roll gap were compared with experimental measurements. From the comparisons between analytical and experimental results, it is clear that this model can offer useful knowledge in designing the pass-schedule of a plate rollingprocess.