Cold tandem rolling manner and cold tandem roller

摘要

PROBLEM TO BE SOLVED: To realize high productivity and to reduce the production cost by rolling while loading the rolling tension having a specific percent of deforming resistance of a rolling material in a last stand in a cold tundem rolling mill having =4 stands. SOLUTION: At the time of executing cold-rolling in the cold tundem rolling mill having =4 stands of cold rolling mill, the rolling is executed while loading the rolling tension having =30% of the deformed resistance of the rolling material at least in the last rolling stand. By this method, the development of slipping and chattering can be reduced and the development of surface defect on a steel sheet is prevented and the wear resistance of the roll can be improved.