H-SHAPE STEEL HAVING PROJECTIONS ON INSIDES OF FLANGES AND FINISH ROLLING MILL THEREFOR

摘要

PURPOSE:To economically obtain H-shape steel excellent in adhesion to concrete through hot rolling by forming rugged grooves continuously as a fundamental pattern in the direction rectangular to the lengthwise direction of the inside of a flange on the insides of the flanges of the H-shape steel. CONSTITUTION:Four grooved, small diameter rolls rolling down the inside of each flange are arranged to the inside of each flange, upper and lower, right and left and each chock 14 of two vertical rolls 12, right and left, rolling down the outsides of the flanges is extended in the inner direction and supported on one side. Bevel gears 15 are provided on the neck parts of horizontal rolls 11 and rotation is transmitted to bevel gears 16 on the sides of the vertical rolls 13. At this time, te horizontal rolls 11 are rotated in the reverse direction to send out rolled stock by rotation of a 2nd vertical rolls. In this way, the transportation of material and the formation of projections can be performed by the 2nd vertical rolls 13 composed of grooved, small diameter rolls for rolling down insides of the flanges and the bevel gears 15, 16 from the horizontal rolls 11.