METHOD AND DEVICE LINE FOR HOT-ROLLING CHANNEL STEEL

摘要

PURPOSE:To provide a method and a rolling mill line for enabling production of many kinds of size in small quantities saving the handling time for roll change and efficiently rolling the continuous cast slab by executing stepless adjustment of web thickness and flange thickness when the continuous cast slab as a base material is hot-rolled into a channel steel while keeping the outer width dimension of the same series in a fixed state. CONSTITUTION:A 2-high rough rolling mill BD, if necessary used in combination with a 2-high shaping rolling mill RH and a rough universal mill RU, is used. A U-bending machine RB composed of stepped horizontal rolls 5a, 5b having a changeable drum width each and disk-shaped horizontal rolls 6a, 6b, and a universal finishing rolling mill FU which is provided with collar parts Q on the horizontal rolls for finishing the flange end parts, formed with a flat surface on other horizontal rolls and provided with right and left vertical rolls to press the outer side surfaces of the flange are arranged to roll and manufacture the channel steel.