| 摘要 |
PCT No. PCT/AT80/00023 Sec. 371 Date Feb. 26, 1981 Sec. 102(e) Date Feb. 26, 1981 PCT Filed Jul. 7, 1980 PCT Pub. No. WO81/00222 PCT Pub. Date Feb. 5, 1981.In a process of bending sheet metal elements having a sectional shape which is continuous in one direction, longitudinal beads are formed or existing beads are enlarged in the sheet element as it is bent at least in the region in which the bending results in an upsetting of material, i.e., in the region in which the sheet metal element is subjected to compressive stress. |
