| 摘要 |
PURPOSE:To improve shape controlling ability with the bending effect of intermediate rolls and the projecting shape effect of split reinforcing rolls in a multiple stages cluster rolling mill by moving a pair of upper, lower work rools in mutually opposite directions in the axial direction of the rolls. CONSTITUTION:The effective ends of upper, lower work rolls 2 are moved and set to at the positions apart by certain distances from both ends accaording to a rolling material 1. While the above-described distances are changed depending upon the shape of the material 1 after the rolling, roll bending devices 10 mounted between intermediate roll metal chocks 7 and housing 9 are actuated. Since the rolls 2 are small in diameter, the parts in contact with the material 1 bend along the rolls 3, and as the positions of the reaction of rolling acting upon the rolls 2 from the rolls 3 go nearer the end parts of the material 1, the bending moment by the contact load received from the rolls 3 decreases and the bending deformation of the work rolls in the end plates of the plate is reduced. At the same time, the deformation of the work rolls near the end parts of the plate by the rolling load is corrected by crown, whereby the rolled products of good shapes are obtained. |
