Springback and deformation uniformity of high-strength aluminum alloy sheet using electromagnetic forming

Yan, Ziqin; Du, Zhihao; Cui, Xiaohui; Meng, Yimin

doi:10.1007/s00170-021-06926-6

Cited by 8 publications

(1 citation statement)

References 17 publications

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“…In EMF-related studies, to shape materials with low electrical conductivities, a drive sheet is used to perform simultaneous forming. The drive sheet, primarily composed of highly conductive aluminum, applies a forming force to the target blank [32,33]. However, a drawback is that a drive sheet is required for each forming operation, and it cannot be reused because it is considered a consumable.…”

Section: Free-bulge Analysismentioning

confidence: 99%

Numerical Study on Electromagnetic Hydraulic Forming Process to Overcome Limitations of Electromagnetic Forming Process

Kim,

Kim

2024

Materials

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This paper provides a comparison between the conventional Electromagnetic Forming (EMF) technique and the novel Electromagnetic Hydraulic Forming (EMHF) approach. The EMHF involves the use of finite element analysis coupled with the EM and arbitrary Lagrangian–Eulerian techniques analyzed through LS-DYNA. In the free-bulge configuration, EMF is influenced by the forming coil, resulting in a dead zone and uneven forming. Additionally, EMF can only be used to shape materials with high electrical conductivity. In contrast, EMHF, driven by induced hydraulic pressure from the electromagnetic field-affected drive sheet, is independent of the electrical conductivity of the material and produces dome-shaped workpieces. For rectangular die shapes, EMF is prone to collision owing to the acceleration of the blank, which results in a reduced quality owing to bouncing. However, EMHF exhibits no bouncing effect and successfully achieves the target shape in most cases. The two techniques differ in the strain rate, with EMF at 4850/s, whereas EMHF operates at approximately 1250/s. Despite being slower, EMHF is still a high-speed forming technique. In conclusion, EMHF is a promising technique capable of addressing the shortcomings of conventional EMF and achieving improvements in forming processes.

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Section: Free-bulge Analysismentioning

confidence: 99%