Research on the Cause and Control Method of Edge Warping Defect during Hot Finishing Rolling

Different from the cross-section profile defects caused by uneven roll wear or external forces during hot finishing rolling, edge warping defect often occurs and has special local characteristics. However, cause control method of are still unclear. By superposition calculating shape, it is found that high-order comprehensive gap contour formed bathtub-shaped thermal parabolic original shape main strip warping. To ensure rather than target curve in form a parabola determined according to amplitude middle position last standard rolling unit, then subtract obtain desired antithermal shape. In theory application, optimization can effectively avoid occurrence defect.