Methods and Apparatus for Producing Steel Channel Sections

• Main Authors: IKUYA NODA, HISAO MINAMI, SHINICHIRO INOUE, TAKASHI UETA, RYO HIRANO, SADAO HOKARI, KEN ISHIGURO, GORO ABE, AKIRA YAMAMOTO, FUJIO SOMENO
• Format: Patent
• Language: English
• Published: 08.04.1970
• Subjects: MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVINGMATERIAL; PERFORMING OPERATIONS; PUNCHING METAL; ROLLING OF METAL; TRANSPORTING

1,187,059. Rolling flanged bars. FUJI IRON & STEEL CO. Ltd. 21 June, 1967 [21 June, 1966], No. 28567/67. Heading B3M. An apparatus for rolling steel channel sections comprises a reversible roughing mill group composed of at least a universal rolling mill 13 and an edging mill 14. It is preferable to have a second universal mill 131 after the edging mill and to position the mills close together for continuous rolling. The ingots are shaped in a blooming mill (11), Fig. 4 (not shown), and delivered to the roughening mill for a series of forward and return passes. After the rough rolling the channel sections are finished in a finishing mill (15) which may be a universal mill or a structural rolling mill with grooved rolls. A pair of roughening mills (A), (A1) may be arranged in the pass line, Fig. 4b (not shown), each comprising a universal mill (13), (131) and an edging mill (14), (141). The universal mills have vertical rolls 22a, 22b and horizontal rolls 21a, 21b. The horizontal rolls are driven by a motor and the vertical rolls are driven by frictional contact with the work. Various shapes of rolls for the universal mill of the roughing mill are shown. The web of the channel is rolled between the horizontal rolls 21a, 21b and the flanges between the lower horizontal roll 21b and the vertical rolls 22a, 22b. The corners 41 formed in the universal mill are rounded off in the edging mill by driven horizontal rolls 23a, 23b or similar rolls in the other embodiments. The rolls 23a, 23b have outwardly angled surfaces and a recess so that they do not roll the centre of the web. The channel section may have various shapes, Fig. 3 (not shown), and may be W-shaped so that by cutting along the centre of the web angle sections with unequal leg lengths are formed, Fig. 3i (not shown). This section also prevents friction between the rolls and the flanges which are divergent but at right angles to the web. The finishing strands may be universal mills, Fig. 9 (not shown), or a structural rolling mill, Fig. 10b (not shown), with a series of passes through which the work is passed in turn. The flanges may be grooved by having grooved vertical rolls (62b), Fig. 11 (not shown), in the universal mill of the finishing strand. These vertical rolls may alternatively have other shapes to impress on the flanges.