| 摘要 |
PURPOSE:To improve the productivity by correcting a step part between a thick plate and a thin plate part with an adjustable grooved roll so that a large degree of workability is not given to the step part. CONSTITUTION:An intermediate bar stock 1 of deformed cross section and composed of a thick plate part and a thin plate part is rolled by a grooved roll and a flat roll. Then, adjusting rolling for giving nearly the same degree of workability to the thick and thin plate parts is carried out to manufacture a bar stock of deformed cross section. While the intermediate bar stocks 1, 2 obtained by a groove rolling stage is finish-rolled to the final product 3 in the adjusting rolling stage, the step part is corrected with an adjusting grooved roll Rs having an adjustable curvature so that an extremely large degree of workability is not given to the step part between the thick plate part and the thin plate part. An intermediate annealing stage is eliminated and rolling is performed. In this way, stages between the groove rolling and adjusting rolling can be unified into one manufacturing line. |
