THE EFFECT OF ASPECT RATIO UPON FRICTION AND NORMAL FORCES IN STRIP ROLLING

Using a sensor developed in the department of Mechanical Engineering a t Queen's University, normal and friction forces have been measured at the interface in cold rolling of aluminum. The development of the sen sor has been published previously for an aspect ratio [width/thickness ] of 2.3. Experiments with that sensor showed that friction was not co nstant throughout the roll gap but varied with time. A redesigned sens or, based upon previous work has been used, successfully, to conduct a further tests for several different aspect ratios; the intention is t o observe the effect of the degree of aspect ratio upon friction and n ormal forces. The results of these experiments are presented and discu ssed.