| 摘要 |
Method and device for bending sheet-metal sections. It is previously known to bend sectional sheets, but the known art involves certain problems to bring about a non-angular bend with a small radius and without damaging the sheet. According to the invention it is proposed for eliminating said problems, that in connection with the impressing of the sheet portions located closest to the bending axis the lateral portions (1c, 32c, 50c) of the sheet are subjected to an outwardly directed force (17, 39, 56) or prestressing in a plane through the impressions (34; 59), in order to form an outward bulging (40, 58) in the lateral portions (1c, 32c, 50c) and on the same side of the sheet as the impressions (34; 59). |
