2200 Aluminum Four-High Mills Dynamic Growth In The Aixal Force

Modern thin aluminum foil rolling mill in order to meet broadband demand for aluminum products, a large number of the existing and the precision of shape control based on the characteristics of the small work roll diameter, wide body and high speed roller direction. Mill has its representative from the United Kingdom DAVY the mid-2200 the company introduced aluminum foil, the finishing mill. However, the 2200 aluminum foil rolling mill from the pre-production to the present, because of its work rolls (upper) side-thrust manipulation of double row angular contact ball bearing short-lived burning incidents that are forced down to about half the maximum speed to maintain production, seriously troubled production, the bottleneck for high-speed production. The main reason for the occurrence of such incidents is the mill caused by excessive axial force.For 2200 in aluminum foil rolling mill work roll bearing thrust bearing severe burning of the abnormal phenomenon, the mill has had several on-site industrial testing and found that high-speed aluminum foil four-roll mill dynamic growth of the phenomenon of axial force. Mill axis force dynamic growth in the stabilization of the root causes of rolling process, has been set for 3 mm offset from the positioning method does not work, in which the work roll and backup roll dynamic crossover behavior, result in cross-roller and roller bearing angle by large, resulting in dynamic growth and a larger axial force axial force. In the mill design did not take into account a larger axial force, so short-lived burning incident occurred bearings.Finally, according to a summary of tests and theoretical analysis put forward radical 2200 four-roll mill rolls aluminum foil dynamic crossover behavior of the control program, geometric containment method and cross-cutting research and development since the bit anti-roll system. Confirmed by experiments, geometric hair and R & D of self-containment bit anti-cross-roll system also applies to other large-scale high-speed precision strip mill.