公开(公告)号：US11260444B2

公开(公告)日：2022-03-01

申请号：US16743621

申请日：2020-01-15

Applicant: Harbin Institute of Technology

Inventor： Yongchao Xu ,  Shijian Yuan

IPC: B21D22/22 ,  B21D22/06 ,  B21D22/24 ,  B21D24/08 ,  B21D37/10 ,  B21D43/00 ,  B21D11/22

Abstract: The present invention discloses a forming device for a large thin-walled part with a curved surface, which includes a punch, a blank holder, a die, a lower die plate, a first annular sleeve and second annular sleeves. The first annular sleeve is connected with first driving oil cylinders. An inner diameter of the die is greater than an outer diameter of the punch. The first annular sleeve is arranged in a gap between the punch and the die. The second annular sleeve is arranged at the bottom of the punch. The first annular sleeve is arranged outside the second annular sleeve. The second annular sleeve is connected with second driving oil cylinders. The first driving oil cylinders and the second driving oil cylinders are connected with a hydraulic system.