Estimation of Load and Torque in the Hot Rolling Process

Abstract

A shear plane theory of hot rolling is proposed, based on the well-known observation of localized deformation during the rolling process. Equations of simple form in terms of yield stress and geometric functions enable roll load and torque to be readily evaluated with or without tensions. Comparison with the experimental results of Wallquist suggests that the theory gives a more satisfactory indication of the influence of the R/h ratio on load and torque than does the Sims analysis. Equations are presented in four forms: the general case with tensions; the more common case without tensions; simplified equations which are valid for most practical conditions; and graphical functions for use with the Cook and McCrum yield stress data.