| 摘要 |
<p>PURPOSE:To minimize deflection generated on a work roll by mutually separating an intermediate roll and a movable sleeve roll in the axial direction in accordance with the width of a material to be rolled and superposing the end parts on the straight barrel side of each of the intermediate roll and movable sleeve roll on the side parts of the material to be rolled. CONSTITUTION:Upper and lower work rolls 21, 22 with which the material 23 to be rolled is directly screwed down are only rotatably supported, made so that movement in the axial direction is impossible and further the intermediate rolls 24, 26 and the movable sleeve rolls 34, 38 are made so as to be mutually separable/movable in the axial direction. In the case of this rolling, first the intermediate rolls 24, 26 are mutually separated and the end parts on the straight barrel side of the respective intermediate rolls 24, 26 are superposed on the side parts of the material 23 to be rolled. Next, the lower movable sleeve roll 38 is moved in the same direction as the upper intermediate roll 24, also the upper movable sleeve roll 34 is moved in the same direction as the lower intermediate roll 26 and superposed on the respective side parts of the material to be rolled. Then, upper and lower loads acting on the work rolls are mutually cancelled and deflection is minimized.</p> |
