Simulation of deformation and temperature in pierce rolling

Abstract

We have proposed a method of numerical simulation for hot caliber rolling, in which the deformation of the material is analyzed by the conventional three-dimensional rigid-plastic finite-element method, while the temperature distribution in the material is calculated using a new combined method of the three-dimensional finite-element method and the one-dimensional finite difference method. In this paper, the method of numerical simulation for hot caliber rolling is applied to the simulation of deformation and temperature in pierce rolling. Although there are many types of pierce rolling such as press roll piercing, barrel-type rotary piercing, and corn-type rotary piercing, the simulation of deformation and temperature in barrel-type rotary piercing, which is well known as Mannesmann piercing, is presented in this paper. First, the methods of analysis which are proposed for the first time for the analysis of the barrel-type rotary piercing are explained. Next, the simulation is performed in various rolling conditions and the effects of the minimum roll gap, the feed angle, the plug diameter and the plug position on calculated results are demonstrated.