Experimental analysis of roll bandages for rolling mills

Abstract

The goal of the submitted paper is to introduce briefly results of experimental stress analysis which was focused on bandage of a back-up roll of rolling mill. Measurements have been carried out during technological process of manufacturing particular bandage roll as well as during running in the mill line. At first, residual stresses had been measured from previous heat-treating process and also after following press mounting on the roll. After press mounting a superposition, from the residual stresses and the stresses caused by press mounting, occurred. Stresses from the press mounting have been also numerically analyzed. Manufactured rolls were consecutively built into mill line and after particular time of running, residual stresses on the surface of bandage had been measured. For the purpose of comparison, we have also measured residual stresses on forged roll as well as on cracked bandage of broken out roll. Hole drilling method has been used for residual stress measurement.