METHOD AND DEVICE FOR CORRECTING TOP BENDING OF BAR MATERIAL IN HOT STEEL SHEET ROLLING

摘要

PURPOSE:To exactly correct the top end bending in the horizontal surface of bar material by applying the side directional force to the top end part of the bar material while applying rolling force to the bar material by a rolling means. CONSTITUTION:The direction of the top end bending in the plane of the bar material 2 after rough rolling is detected, and the side directional force of the opposite direction to the top end bending direction detected at the top end part of the bar material at the exit side of its rolling is applied to the bar material while applying the rolling force to the bar material 2. Thus, the bending moment in the plane of the bar material 2 is exerted on the rolling part of the bar material, the compressing stress deltac is generated at the outside and the tensile stress deltat is generated at the inside on the center of the sheet thickness as the standard. Therefore, since the inside of the top end bent is easily elongated and the outside is difficult to elongate on the rolling part, so the bent top of the bar material is easily returned to the regular passing position by applying the side directional force.