GROOVED ROLLING ROLL GROUP, ROLLING METHOD WITH MANDREL MILL USING THIS GROOVED ROLLING ROLL GROUP AND MANDREL MILL

摘要

PROBLEM TO BE SOLVED: To provide a grooved rolling roll group or the like by which defective entry at the fourth stand and roll slip are effectively prevented.;SOLUTION: This grooved rolling roll group is the grooved rolling roll group which is used for a mandrel mill in each stand of which a plurality of grooved rolling rolls R are arranged and the distance S2 between the center O' of curvature of the groove bottom profile of the grooved rolling roll R arranged in the second stand and the center O of the groove and the distance S4 between the center O' of curvature of the groove bottom profile of the grooved rolling roll R arranged in the fourth stand and the center O of the groove are set so as to satisfy formula (1). S2×0.40 S4 S2×0.60.;COPYRIGHT: (C)2006,JPO&NCIPI