Simulation of friction variation in hot strip rolling by 3D rigid plastic finite element method

Abstract

In both rolling theory and practice, the important factor that must be considered is friction on the surface of the roll-strip. In order to improve the accuracy of on-line controlling models for hot strip rolling, in this paper, the rigid plastic finite element method is employed, considering constant friction, friction variation and mixed friction models to simulate this strip rolling. The results of simulation, such as rolling pressure and forward slip, taking into account the friction variation with suitable models in the roll bite are in good agreement with the experimental values. The modelling of friction variation with suitable models and mixed friction in the roll bite is stable and applicable, which can improve the accuracy of on-line control models.

Keywords:

• Friction variation
• Hot strip rolling
• Rigid plastic FEM
• Simulation