Springback Reduction of L-Shaped Part Using Magnetic Pulse Forming

Cui, Xiaohui; Xiao, Ang; Du, Zhihao; Yan, Ziqin; Yu, Hailiang

doi:10.3390/met10030390

Cited by 10 publications

(6 citation statements)

References 22 publications

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“…The main objective of their work was to extend the Chord model to be able to reproduce the strain recovery point with non-zero residual stress, enabling a more accurate determination of springback. Cui et al [20] proposed a new stamping method for forming the L-shaped part. They call this method electromagnetic-assisted stamping (EMAS).…”

Section: Introductionmentioning

confidence: 99%

The Effect of Material Models in the Fem Simulation on the Springback Prediction of the Trip Steel

Mulidrán

Spišák²,

Tomáš³

et al. 2021

Acta Metall Slovaca

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In this work, the influence of material models used in the FEM simulation on the springback prediction is investigated. The interest of this paper is to extend the knowledge base regarding springback predictions in numerical simulation. The springback effect of a V-shaped sheet metal part made of TRIP steel, with a thickness of 0.75 mm was investigated. The bending angle was set to 90°. In the numerical simulation, Hill48 and Barlat yield criteria were used in combination with Ludwik's and Swift's hardening models. Achieved data from the numerical simulations were compared and evaluated with experimental test results. The experimental results showed the relation between springback and calibration force. The effect of specimen cut direction on the springback was smaller in comparison with the calibration force. The numerical results of the springback were not identical with the experimentally achieved springback values in most cases. Particularly, when a calibration force of 1 800 N was used in the simulation. The simulation results showed a good correlation between experimental and numerical results, when Hill48 and Barlat yield criteria were used in combination with Ludwik hardening law and calibration force F with the value 900 N was applied.

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Section: Introductionmentioning

confidence: 99%

The Effect of Material Models in the Fem Simulation on the Springback Prediction of the Trip Steel

Mulidrán

Spišák²,

Tomáš³

et al. 2021

Acta Metall Slovaca

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show abstract

“…The research aimed to study the impact of material models on the accuracy of springback prediction, and the possible springback reduction measures achieved with the change of blank holding force and friction. Other works [ 36 , 44 , 45 ] were focused on springback reduction with the use of an innovative tool or process design. The work of Lawanwong et al [ 17 ] used a double-action bending tool design, which helped with the springback reduction of the hat-shaped part.…”

Section: Discussionmentioning

confidence: 99%

Impact of Blank Holding Force and Friction on Springback and Its Prediction of a Hat-Shaped Part Made of Dual-Phase Steel

et al. 2023

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Formability and its prediction of high-strength steels is an important research subject for forming specialists and researchers in this field. Springback and its accurate prediction of high-strength steels are very common issues in metal forming processes. In this article, the impact of blank holding force and friction on the parts springback made of dual-phase steel was studied. Numerical predictions of the springback effect were conducted using nine combinations of yield criteria and hardening rules. Results from experiments were evaluated and compared with results from numerical simulations. The use of lower blank holding forces and PE foil can reduce springback by a significant amount. Numerical simulations where the Yoshida-Uemori hardening rule was applied produced more accurate springback prediction results compared to simulations that used Krupkowski and Hollomon’s isotropic hardening rules in number of cases.

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“…For instance, in the previous numerical studies of Lorentz force-based forming processes using the finite element software ANSYS, the current density loading way was typically used. Examples include the numerical analysis of an electromagnetic sheet/tube forming process [8], an electromagnetically assisted stamping process [40], an electromagnetically driven forming of a titanium alloy sheet metal [41] and an electromagnetic riveting process [42]. Paese et al [35] developed a current filament method for electromagnetic calculations of an electromagnetic sheet metal forming process with a flat spiral coil.…”

Section: Influence Of Eddy Current Effects On Workpiece Deformationmentioning

confidence: 99%

The importance of coil conductivity and eddy current effects in the analysis of electromagnetic forming process

et al. 2021

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Coil design and performance analysis are critical for the electromagnetic forming (EMF) process. However, previous studies have paid little attention to the coil conductivity, and the influence of eddy current effects in coil conductors on the forming process has not been well understood. This work aims to address these problems through numerical and experimental investigations. It is found that, due to the eddy current effects, the uneven current distribution appears in the coil conductors that should be considered when analysing the forming process, especially for the cases with large heights of coil conductors. Meanwhile, an important and interesting discovery is that the eddy current effects can greatly reduce the sensitivity of the coil conductivity with respect to the workpiece deformation, the Joule heating and the temperature rise in the coil. For instance, compared to a forming system with a copper coil, the forming height of the workpiece in the forming system with an AA5083-O coil is reduced by less than 5 % under the same discharge energy, while the copper conductivity is 3.3 times that of the latter. These results are helpful to understand the EMF process and achieve the optimal design of coils.This is an open access article under the terms of the Creative Commons Attribution-NonCommercial-NoDerivs License, which permits use and distribution in any medium, provided the original work is properly cited, the use is non-commercial and no modifications or adaptations are made.

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Springback Reduction of L-Shaped Part Using Magnetic Pulse Forming

Cited by 10 publications

References 22 publications

The Effect of Material Models in the Fem Simulation on the Springback Prediction of the Trip Steel

The Effect of Material Models in the Fem Simulation on the Springback Prediction of the Trip Steel

Impact of Blank Holding Force and Friction on Springback and Its Prediction of a Hat-Shaped Part Made of Dual-Phase Steel

The importance of coil conductivity and eddy current effects in the analysis of electromagnetic forming process

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