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

A mathematical model using the dual-stream function method under cylindrica l coordinates has been proposed to investigate the position of neutral poin t and the plastic deformation region at the roll gap during plate rolling. The profile of width spread is assumed to be a quadratic function of the cy lindrical 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 t he volume constancy and the velocity boundary conditions within the roll ga p. Experiments on plate rolling using aluminum sheets meshed by electrochem ical etching were carried out. The predicted profiles of width spread and t he plastic flow pattern at the roll gap were compared with experimental mea surements. From the comparisons between analytical and experimental results , it is clear that this model can offer useful knowledge in designing the p ass-schedule of a plate rolling process. (C) 1999 Elsevier Science S.A. All rights reserved.