公开(公告)号：US20230415213A1

公开(公告)日：2023-12-28

申请号：US18039341

申请日：2021-11-08

Applicant: SMS group GmbH

Inventor： Mario THOME ,  Regine AHREM ,  Jochen VOCHSEN

IPC: B21D5/01 ,  B21C37/08

CPC classification number: B21D5/015 ,  B21C37/0815

Abstract: A method for producing open-seam pipes from flat metal products, in particular sheet metal, includes a plurality of individual bending steps using at least one bending tool and at least one externally located lower tool. A plurality of positions of individual bending steps and the insertion depth of the bending tool are calculated in advance. Based thereon the flat metal product is then shaped step-by-step to form the open-seam pipe. After each of the bending steps, a target/actual comparison of the distance between two edges and/or between one of the two edges and the axial center line of the flat metal product is carried out. In case of a deviation, a correction value for the subsequent bending step is determined using a correction algorithm so as then to adapt the insertion depth for the bending tool.