| 摘要 |
PURPOSE:To prevent sheet biasing and to produce a product having a good shape by providing excess metal parts to both sides of a material to be rolled from which one or plural lengths of irregular section steel sheets are simultaneously rolled and providing pressing parts consisting of slopes to rolling rolls. CONSTITUTION:The irregular section steel sheet in generation is rolled of plural lengths and in the case of, for example, two lengths, the excess metal parts 8, 8' and the pressing parts 9, 9' by roll calibers are provided to the material 4 to be rolled. Since the roll surfaces are inclined, the material 4 to be rolled receives reactions F, F' in the central direction respectively at the surface edges in the stage when the excess metal parts are pressed to the pressing parts 9, 9' and are rolled. The excess metal part 8' fills tthe pressing part 9' but the excess metal part 8 does not fill the pressing part 9 if the material 4 biases to, for example, a right direction. The rolling width of the pressing parts increases from the right side and decreases from the left side. The balance between the rolling reactions f, f' of the pressing parts and the reactions F, F' is, therefore, broken, and the right side becomes larger. The self-aligning effect by which the escape of the material 4 toward the outside direction by the edge part is prevented is thus induced. |
