Statistical Regression Analysis of Breakages in Cold Rolling

Abstract

The maximum probability of strip’s breakage during the cold rolling is observed when the values of edge wedge are greater than 150 microns and the saddle coefficient is less than -0.075 and greater than 0.050. It is also shown that there is a pronounced synergistic effect of influence of combination of the saddle coefficient and the edge wedge on the breakage of the strip. When the edge wedge is reduced below 50 microns, the saddle coefficient ceases to affect the breakage of the strip during the cold rolling. At the same time, when the edge wedge is higher than 160 microns, the breakage is minimal with the saddle coefficient in the range from 0 to 0.025.