| 摘要 |
PURPOSE:To manufacture the H-beam at good workability without generating the crack or flaw, etc., by rolling the raw material of rectangular section into the dog bone type roughly shaped billet in the breakdown mill, before intermediate and finish rolling in the universal mill. CONSTITUTION:The raw material 59 of rectangular section, prepared by the blooming or the continuous casting, is roughly shaped by the breakdown rolls 36, 36, into the flat and roughly shaped billet (dot bone) 60. The first universal mill consists of upper and lower rolls 37, 37, and the right and left side rolls 38, 38; the first edger mill is located near the first universal mill and consists of upper and lower rolls 39, 39; the dog bone 60 is rolled for drawing and forming by the first universal mill and the first edger mill; further, the rolling for drawing and reforming is repeated by the second universal mill consisting of upper and lower rolls 40, 40, and the right and left side rolls 41, 41, and the second edger mill consisting of upper and lower rolls 42, 42; after that, the inclination of the flange is corrected by the finishing universal mill consisting of upper and lower rolls 43, 43, and the right and left side rolls 44, 44; and then, the rolling is completed. |
