Rolling of Channel Section Beams in Three Passes: An Experimental Investigation of Roll Load, Torque and Geometry Changes

Abstract

The paper presents some typical results of roll load, roll torque, spread and that of geometry changes observed during an experimental investigation carried out in rolling channel section beams in a three pass sequence using tellurium lead as a model material to simulate hot rolling of steel. The tests consisted of rolling rectangular specimens of three different initial shape factors ie width to height ratios, at varying applied draught stages in the three passes. The results given are compared with those predicted using some of the aproximate formulae suggested by such authors as, Orowan-Pascoe and Jedlicka. Approximate theoretical expressions to calculate roll load, roll torque and spread, the estimated results from which co-relate well with the experiments are also suggested.