公开(公告)号：US20240359225A1

公开(公告)日：2024-10-31

申请号：US18769033

申请日：2024-07-10

Applicant: DALIAN UNIVERSITY OF TECHNOLOGY

Inventor： Zhubin HE ,  Haihui ZHU ,  Jian NING ,  Yi XU ,  Linwei LENG

IPC: B21C23/14

CPC classification number: B21C23/14

Abstract: The present invention belongs to the technical field of metal forming manufacturing and discloses an integral forming method for a large-size thin-walled ring shell. The integral ring shell obtained by the forming method of the present invention has only one circumferential weld seam and one radial weld seam. If the two weld seams are located in an excisable process segment region, the target part without weld seams can be obtained after the process segment is cut off. The forming method of the present invention adopts a local thermal expansion forming method, plastic deformation occurs only in mold-constrained high temperature regions in a single local forming process, and a part with each region meeting the requirements can be obtained after several local thermal expansion forming processes. The forming method of the present invention can obtain two open cross-sectional ring shell components or multiple segmented ring shell components at one time.

公开(公告)号：US20210154721A1

公开(公告)日：2021-05-27

申请号：US16937660

申请日：2020-07-24

Applicant: DALIAN UNIVERSITY OF TECHNOLOGY

Inventor： Zhubin HE ,  Yanan LI ,  Yanli LIN ,  Xinyu HU ,  Linwei LENG ,  Shijian YUAN

IPC: B21D26/041 ,  B21D26/045 ,  B21D26/049

Abstract: A method and device for manufacturing a large-sized thin-walled tubular part by gas-liquid internal high pressure forming (IHPF). A gas and a liquid are filled at a certain volume ratio into a thin-walled blank. The pressure of the gas-liquid mixed fluid is mainly determined by the gas pressure. During the deformation of the thin-walled blank, due to a large compression ratio of the gas, the gas-liquid pressure will not basically change with the change of the volume of a blank cavity. A support pressure on the cavity of the thin-walled blank is stable in the entire forming process. In addition, even if there is a slight leakage of the liquid or gas during the forming process, the medium pressure inside the blank will not fluctuate largely. In this way, embodiments lower the requirements for the sealing effect during the tubular part forming process.