JPS5630004A - Rolling method for sheet pile - Google Patents

Abstract

PURPOSE:To contrive the reduction of the unit consumption of the roll and the improvement of the yield of the rolling work, by subjecting the beam blank, etc., to the roughing pass to be performed by the roughing caliber mill, and to the intermediate mill group and the finishing caliber mill so as to be roll formed into the specified shape, at rolling the U-shape sheet pile of Ralsen type. CONSTITUTION:The beam blank or the steel billet or the cast billet of square shape, etc., is rough rolled by the roughing caliber mill 11 (BD mill); and next, the billet is passed through the intermediate mill group 12 comprising the caliber eding mill 20, the UR mill 21, the edging mill 22, etc., and only the part c1 corresponding to the joint is reduced without reducing the part b1 corresponding to the web and the part b12 corresponding to the flange of the rolled product; after that, the part b12 corresponding to the flange and the part b1 corresponding to the web are reduced by the UR mill 21 for performing the reverse roll forming work; and finally, the sheet pile of specified size is obtained by the finishing pass (SF mill) 13. This method is especially suitable for roll forming the U-shape sheet pile of Ralsen type consisting of the single claw, and this method prevents the overfill of material into the vacant clearance of each roll, and besides, prevens generation of the overlap.