Research on the effect of the local constraints on sheet hydroforming with the movable die

Journal Article · Fri Aug 05 04:00:00 EDT 2005 · AIP Conference Proceedings

DOI:https://doi.org/10.1063/1.2011275· OSTI ID:20726172

Zhou, L X ^[1]; Lang, L H; Danckert, J; Nielsen, K B ^[2]; Zhang, S H ^[1]

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1. Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016 (China)
2. Aalborg University - Fibigerstraede 16, DK-9220 Aalborg (Denmark)

An improved Sheet Hydro-forming process was put forward, which was researched in the Institute of Metal Research (Chinese Academy of Sciences) and Aalborg University jointly. In this paper, the effects of local constraints on the sheet deformation were researched experimentally. For this case, the local constraints include rigid tools (movable die) and surface roughness of the movable die, especially around the shoulder of the movable die. Finally, ASAME system and FEM are used to analyze the forming process to explain some results that were found in the experiment. In the simulation, the effects of the friction between the movable die and the blank and the movable die on the deformation of the blank are investigated in detail by using the FEM code LS-DYNA. For the sheet hydroforming with local constraints, the contact between the sheet and the dies affects the material flow and the fracture of the sheet can be avoided. Moreover, the forming limit of sheet metal can be remarkably improved. This process meets the need of the deformation of complicated parts as well as forming of low-formability and light-weight materials, such as aluminum lithium alloys and magnesium alloys. The die can be replaced with other die of various shapes, and can also be made of very cheap materials. Thus complex-shaped sheet parts can be formed with less expensive tool systems.

• OSTI ID: 20726172
• Journal Information: AIP Conference Proceedings, Journal Name: AIP Conference Proceedings Journal Issue: 1 Vol. 778; ISSN APCPCS; ISSN 0094-243X
• Country of Publication: United States
• Language: English

Related Subjects

75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ALUMINIUM
ALUMINIUM ALLOYS
COMPUTERIZED SIMULATION
DEFORMATION
FINITE ELEMENT METHOD
FRACTURES
FRICTION
LITHIUM ALLOYS
MAGNESIUM ALLOYS
MATERIALS WORKING
ROUGHNESS
SHEETS
SURFACES