公开(公告)号：US20210162479A1

公开(公告)日：2021-06-03

申请号：US17055939

申请日：2020-06-17

Applicant: DALIAN UNIVERSITY OF TECHNOLOGY

Inventor： Xuyue WANG ,  Chenghang LI ,  Ying YAN ,  Zihui LI ,  Dongming GUO

IPC: B21D5/00 ,  B21D11/20

Abstract: The present invention belongs to the technical field of high-efficiency, high-precision and high-performance laser bending of metal sheets, and relates to a line-shape spot laser bending method for metal sheets. The present invention uses a multimode laser scanning mirror or a single piezoelectric deformable mirror to convert laser Gaussian distributed point spots to uniformly distributed line-shape spot, and meanwhile, loads the spots in a bending line area and bends metal sheets so that the temperature field in the bending line of the metal sheet is distributed uniformly to achieve the purposes of reducing warpage deformation, enhancing bending angle consistency and increasing the bending efficiency.