| 摘要 |
PCT No. PCT/CA94/00620 Sec. 371 Date May 9, 1996 Sec. 102(e) Date May 9, 1996 PCT Filed Nov. 8, 1994 PCT Pub. No. WO95/13151 PCT Pub. Date May 18, 1995A method of manufacturing a one piece integral metallic beam (22) having flanges (24), and a web (26) joining said flanges, the beam having been hot rolled from a heated metal workpiece (20) to produce an integral one piece beam having flanges and a web extending therebetween, the flanges having a predetermined first thickness, and the web having a predetermined second thickness less than the first thickness, and in which the web is heated to a hot forming temperature, without substantially heating the flanges and, the web is than passed through at least one metal forming die set (16), which is repeatedly closed on the web to form the web without forming the flanges. The method may also include the piercing of openings (28) through the web, and the forming of lips (30) around the openings, and also, the forming of a secondary product (52) from the portion of the web discarded from the opening, and also hot forging the lips (30) around the openings. Also disclosed is apparatus for carrying out the method, and a forming and forging die for both forming and forging a metal workpiece. |
