ROLLING METHOD AND ROLLING MILL FOR ECCENTRIC RING TYPE EDGING MILL

摘要

PURPOSE:To prevent scratches on a web and to improve the quality of a shape steel by separately driving web-constraining ring rolls eccentric to horizontal rolls rolling down flange edges from the drive of horizontal rolls. CONSTITUTION:Eccentric rings 4 are installed freely rotatively by bearings 7 on the collars of a horizontal roll shaft and the web constraining ring rolls 3 are installed freely rotatively on the outer periphery of the eccentric ring through bearings 6. Drive gears 15 are mounted on the outer peripheries of the restraining ring rolls 3 and a driving pinion and a hydraulic motor are mounted on a frame 19 at positions engaging with the gears 15. In rolling, the flange edges of the shape steel are rolled down by horizontal rolls 2 and, on the other hand, the web is rolled by the ring rolls 3 driven by a hydraulic motor as the web is restrained. When rotating speeds of the eccentric rolls is controlled to be equal no slip occurs between the surface of the web and the surface of the roll.