| 摘要 |
FIELD: process engineering.SUBSTANCE: invention relates to metal forming, particularly, to stepwise bending of complex shape parts with U-like bent-off elements. Strip or band material is fed to cutting station for cutting of blank to be displaced to station of bending of blank web lengthwise edge to one side. Then, blank flange is bent to opposite side to make U-like bent-off element. Then, said U-like bent-off element is preliminary bent at the angle to opposite side and finally bent to make said U-like element stay parallel and closely to blank web. Note that abutting lengthwise blank edges and those of U-like element that make the dual depth are bent off simultaneously with final bending.EFFECT: enhanced performances.2 cl, 2 dwg |
