METHOD AND ROLLING MILL LINE FOR ROLLING SHAPE STEEL

摘要

PURPOSE:To obtain shape steels of various sizes in the same rolling operation by performing finish rolling combining flange raising with roll widths properly changed by segmented rolls for web thickness drafting in which a roll width is changeable in accordance with a variable amount of a rolled stock web width. CONSTITUTION:A shape stock 1 is subjected to one or more rolling passes by U1 and U2 mills under a condition in which the flange parts F are restricted and then rollings whose final pass being performed by the U1 mill are performed to obtain a necessary width spreading amount Z ( X h). Next, both web end regions of the stock 1 are drafted to have an equal thickness to that of the web central region and are spread and are subjected to finish rolling combining flange raising by rolls 4 of a UF mill. Hence, shape steels of various sizes are manufactured by increasing variable amounts of a web width of stocks without frequent change of rolls.