| 摘要 |
PURPOSE:To obtain the angle material which is perpendicular in a corner angle part and is uniform in the thickness of respective parts by forming one side part and the other side part which are flat with each other and a perpendicular projecting part at the point corresponding to the corner angle part in a rough rolling stage, then subjecting the material to intermediate molding, edging, thickness adjusting, and after treating stages. CONSTITUTION:A billet W1 is successively hot rolled by means of plural sets of rolling rolls to form the one side part W4 and the other side part W5, which are flat with each other, and the perpendicular projecting part at the point corresponding to the corner angle part W3 to form the angle material, by which the intermediate product W2 having nearly the same size as the thickness size of the product angle material WC is obtd. The intermediate product W2 is crimped by pinch rollers and is molded to the angle material WA which is perpendicular in the corner angle part 3 and with which both sides W4, W5 come into perpendicular contact therewith. The material is then supported by a central rolling roll 7 and the respective edge parts W6 of the one side part W4 and the other side part W5 are rolled by edging rolls 8, 8 to form the edges W6 having flat end faces W7. The result angle material WB is adjusted in thickness by the rolling roll and a rolling roll with a projection and is then heat treated. |
