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Plate rolling technology has progressed rapidly, and the developments of gauge control,1,2) crown control3) and plan view control4,5) have contributed to decreasing the yield loss. Some noteworthy rolling methods for getting a better plan view pattern were applied in commercial producing and obtained a certain effect, such as MAS rolling (Mizushima Automatic plan view pattern System rolling)6) and DBR (Dog-Bone Rolling).7) Besides, the profile shape control in width is very important as well. Moazeni and Salimi8) investigated the nonuniformity of thin sheet deformation in width direction by 3D FEM (finite element method). Ruan et al.9) simulated the broadside-longitudinal rolling process and found the different width spread in the rolling direction, which contributes to the formation of convex shapes. For heavy plate rolling, the lateral surface usually takes on a shape known as “double bulge”, a concave profile, with maximum spread just below the contact surface.10,11) Inoue et al.12) reported the method for TFP (Trimming free plates) on the basis of edging characteristics analysis in lead model tests, in order to decrease widthwise loss of plates caused by double bulge even overlapping of edge. Zhang et al.13) found the double bulge will be lightened by controlling the reduction ratio Note

Side-surface Shape Optimization of Heavy Plate by Large Temperature Gradient Rolling