| 摘要 |
<p>PURPOSE:To reduce rolling reduction of a work roll in the edge parts of a sheet and to attain the min. edge drop by separating upper and lower movable rolls mutually in the axial direction and adjusting roll bending force and the amount of shift of the movable roll. CONSTITUTION:The positions of the upper and lower movable rolls 11, 12 are moved to the desired rolling contact positions of the upper and lower work rolls 1, 2 corresponding to the width of a material 31 to be rolled before rolling. The upper and lower movable rolls 11, 21 are mutually set in the positions in the reverse direction so that their side end parts are lapped over the side parts of the material 31 to be rolled and restraint between the upper and lower work rolls 1, 2 and the upper and lower movable rolls 11, 21 is removed. After this initialization, the material 31 to be rolled is passed through between the upper and lower work rolls 1, 2. When edge drop is caused, the edge drop is suppressed by adjusting the bending forces of the work rolls 1, 2 and drastically controlling the rolling reduction in the edge parts of the material 31 to be rolled and a rectangular strip material is obtained.</p> |
