| 摘要 |
PURPOSE:To control deviation of web center and nonuniformity of each flange width within the limits of tolerance by constraining with grooves at the individual degree of constraint with groove respectively to four flanges of a material to be rolled and executing edger rolling. CONSTITUTION:A wide flange shape is rolled by executing breakdown rolling by several times of reverse rollings, rough universal rolling and edger rolling by several times of reverse railings and finish universal rolling. As the horizontal roll of an edger mill, a roll whose sleeves 2, 3 which are brought into contact with the material 1 to be rolled are divided into at least three pieces and at least most outside sleeves 3, 3 of the respective divided ones are freely movable in the direction of web height is used. By executing edger rolling while constraint each flange with the grooves at the degree of constraint with groove that are individually respectively set for each passe about all flanges 1a-1d of the material to be rolled, the deviation of web center is controlled in edger rolling. |
