| 摘要 |
PCT No. PCT/GB94/00573 Sec. 371 Date Sep. 26, 1995 Sec. 102(e) Date Sep. 26, 1995 PCT Filed Mar. 21, 1994 PCT Pub. No. WO94/22615 PCT Pub. Date Oct. 13, 1994A method of manufacturing a wheel rim comprising the steps of: (i) pressing or rolling flat steel section into an annulus; (ii) welding the ends of the section together; (iii) heating to about 700 DEG C. one end of the annulus to an axially extending depth of about 7.5 cm; (iv) pressing said one end partially or fully to shape; (v) heating to about 700 DEG C. the other end of the annulus to an axially extending depth of about 7.5 cm; (vi) pressing said other end partially or fully to shape. |
