| 摘要 |
<p>PURPOSE:To deal with a wide sheet width and to prevent excessive bending of work rolls caused by excessive backup by generating a deflection on a work roll by aiming the axial section in a working plane of the work roll to be parallel with a sheet section. CONSTITUTION:When a rolling load F/2 is acted on both ends of a reinforcing roll 2, a rolled stock 5 is subjected to a nearly equal distributed load over its total length and a sheet section is formed into a convex shape caused by bending of the roll 2. By that, a lower work roll 6 is formed into a convex shape. To actually form such a shape, a lower reinforcing roll 7 is constructed so that an outside cover shaft 71 whose both ends are free is fixed to an axial shaft 70 at the center of the shaft 70. When the rolling load F/2 acts on both ends of the shaft 70, an upward load acts on the central part of the shaft 71 and the roll 6 is subjected to a nearly equal downward distributed load from the stock 5, so that both the right and left sides from the center of the shaft 71 are bent as cantilever beams respectively and the roll 6 bends into a convex shape. When rigidity of the shaft 71 is made to be a proper value, bending of the roll 6 is brought to be nearly parallel to bending of a work roll 1.</p> |
