| 摘要 |
PURPOSE:To make many sizes in small quantity production possible, to save manpower for changing roll, to reduce the cost of tool and to improve the shape of product by continuously executing the adjustment of web thickness and flange thickness while maintaining the dimensions of outside width of the same series constant at the time of hot rolling of the channel steel which is made of the base stock of continuously cast slab. CONSTITUTION:The line of hot rolling devices is constituted of a 2-high roughing mill BD with a pair of upper and lower horizontal rolls 1a, 1b on which box- shaped calibers G1... and a flat caliber G4, with which the base stock of slab is rolled into a flat metal plate 10 with prescribed thicknesses and width, are engraved, a pair of right and left driving vertical rolls 2a, 2b on which collar parts Q with which the outside corner parts corresponding to flanges and tip surfaces corresponding to the flanges of the above-mentioned flat metal plate are restrained are projected and U-bending forming machine VM in which a single horizontal roll 3 and fixing guide G which are freely vertically movable between those vertical rolls are arranged. |
