| 摘要 |
The invention relates to a method for producing peripheral segments (240), wherein strip-shaped flat material (116) is continuously shaped at an angle to the axis of the strip to give a closed shape and peripheral segments (240) are separated from the closed strip (272) after welding of a longitudinal seam (124). In order to separate the sections, a supporting edge (278) is provided inside the continuously shaped closed strip (272). Said supporting strip is substantially closed in a circle, extends in a normal plane in relation to the longitudinal axis of the closed strip (272), rests directly on the inside of the closed strip (272) and cooperates with at least one cutting tool (279). Said cutting tool (279), during cutting, is rotated in a cutting position along the supporting edge (278) so that a cutting area is rotated once about the longitudinal axis, thereby separating a peripheral segment (240). During cutting, the supporting edge (278) and the at least one cutting tool (279) are advanced together with the closed strip (272). After cutting, the at least one cutting tool (279) is brought into a contact-free position in relation to the supporting edge (278) and is brought back to its initial position before cutting against the movement of the closed strip (272). The inventive method and device allow a rapid and deformation-free separation of peripheral segments (240) even from extremely thin flat material. |
