| 摘要 |
PURPOSE:To allow the common use of a rough rolling stage and the simplification thereof regardless of sizes by constituting the above-mentioned train of a roughing rolling mill, a double rolling section consisting of upper and lower horizontal rolls, and a universal rolling section built with a pair of vertical rolls in a part of the horizontal rolls. CONSTITUTION:The rough rolls 1 are constituted of the composite rolling mill which executes the double rolling by the upper and lower horizontal rolls and the universal rolling by the vertical rolls built into the right and left of a part of these rolls. Further, the box calibers I, II and molding calibers III constituted of the upper and lower horizontal rolls to roll a stock having a rectangular section to an approximate H shape are disposed in the initial rolling and the universal rolling calibers IV constituted of the upper and lower horizontal rolls and the right and left vertical rolls are disposed in the late period rolling to execute the rolling down of the flange thickness and web thickness of the approximate H shape obtd. in the initial rolling. The common use of the rough rolls 1 for various product sizes is possible by executing the rolling in pass schedules with the rolling device constituted in such a manner. |
