Electromagnetic reduction of a pre-formed radius on AA 5754 sheet

Imbert, J.; Worswick, Michael J.

doi:10.1016/j.jmatprotec.2010.07.021

Cited by 40 publications

(5 citation statements)

References 11 publications

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“…Working coils must have durability, manufacturability, cost/energy delivery efficiency, and safety, according to Imbert and Worswick. 14 However, the most important factor is energy delivery efficiency, as the MPW process employs only the Lorentz force to generate electromagnetic interaction between the working coil and flyer workpiece. Therefore, designing the working coil is a crucial step in the MPW process.…”

Section: Introductionmentioning

confidence: 99%

Selection of design parameters of working coil for Al/Cu tubular Magnetic Pulse Welding

Shim,

Kim

2023

Advances in Mechanical Engineering

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MPW produces a high Lorentz force for welding through the interaction of magnetic fields between the working coil and outer workpiece. Therefore, the design of the working coil is crucial in the MPW process. In particular, it is important to understand and estimate the distribution of Lorentz force on the outer tube and the stress on the working coil. These factors greatly impact the efficiency of energy delivery and the durability of the process. The purpose of this research was to analyze the effect of coil design parameters on the Lorentz force and stress. The ultimate objective was to optimize these design parameters specifically for welding tubular workpieces; for this, an electromagnetic-mechanical FE-model was developed. The design parameters considered in this study included the angle, radius, and protruding length. The Lorentz force and stress were calculated based on these parameters. Notably, the response surface method (RSM) and sequential quadratic programing (SQP) were utilized to develop a prediction model and optimize the design parameters, respectively. The findings revealed that the protruding length and angle are significant design parameters. Consequently, a working coil was manufactured using the optimized design parameters, leading to a successful Al/Cu joint. These results emphasize the indispensability of optimizing design parameters to achieve high-quality joints.

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Section: Introductionmentioning

confidence: 99%

Selection of design parameters of working coil for Al/Cu tubular Magnetic Pulse Welding

Shim,

Kim

2023

Advances in Mechanical Engineering

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“…As an alternate to steel, iron and other metals for automotive lightweighting, aluminum alloy has emerged due to its high specific strength, high stiffness, low density, good energy absorption and strong corrosion resistance. 6xxx aluminum alloy is a developing lightweight material and heat-treatable strengthened alloy, which is widely applied in the automotive manufacturing industry [2,3]. In manufacturing, automotive body parts are mainly characterized by bending deformation, so the formability of the material is very important for stamped workpiece [4].…”

Section: Introductionmentioning

confidence: 99%

Effect of heat treatment conditions on stamping deformation and springback of 6061 aluminum alloy sheets

Wang

Zhu

Kou

et al. 2019

Mater. Res. Express

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The stamping deformation and springback of the 6061 aluminum alloy sheets under different heat treatment conditions were investigated by three-point bending tests. A validated reliable finite element (FE) model was used to further reveal the springback mechanism. It was found that the heat treatment conditions have great influence on the stamping deformation and springback of 6061 aluminum alloy sheets. The most severe local deformation occurred at the punch position of the T6-8 h alloy sheet, showing minimum bending radius and thickness. However, the bending radius and thickness of the homogenization treated (HT) alloy sheet were maximum, resulting from more materials participate in bending deformation. The HT and solution treated (ST) alloys exhibited higher stamping performance than that of the natural aged (NA) and T6 alloys. The material strength of the T6 alloys can be improved by aging time, motivating greater springback and neutral layer offset. The springback and neutral layer offset of the T6-8 h alloy sheet were the highest, while the HT alloy sheet was the lowest. Furthermore, the effect of material parameters on stamping deformation and springback of sheet was studied by combining with theoretical analysis and experimental results. The research showed that the bending radius and thickness of the sheet in the fillet region increase with the increase of strain-hardening exponent and elongation and with the decrease of yield ratio. After unloading, springback angle and radius increase with the increase of yield strength and strength factor and with the decrease of strain-hardening exponent. These achievements may serve as a guideline for enhancing stamping performance and reducing springback of the aluminum alloy sheet in bending process.

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“…In order to obtain a relative accurate numerical result, the overestimated electromagnetic force may be compensated by reducing the calculation time of electromagnetic field. Imbert and Worswick [6] took a quarter of the coil current pulse to calculate the electromagnetic force. Oliveira et al [7] employed a quarter to a half of the coil current pulse in the numerical analysis.…”

Section: Introductionmentioning

confidence: 99%

“…EMF experiments with the Vshaped die have been carried out by researchers, among whom Imbert et al [9] formed a rectangular sheet into a V-shaped die with EMF and pointed out that the force distribution and rebound have great influence on forming results. Imbert and Worswick [6] carried out an EMF experiment to reduce the radius of the pre-formed V-shaped part and got a smaller radius that cannot be formed by conventional methods. In this paper, the geometrical deviations between the formed part and the desired part were formulated based on the V-bending experiment, and the factors affecting the results were presented through the numerical simulation.…”

Section: Introductionmentioning

confidence: 99%

Geometric issues in V-bending electromagnetic forming process of 2024-T3 aluminum alloy

Xiong

Wang

Wan

et al. 2015

Journal of Manufacturing Processes

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Electromagnetic reduction of a pre-formed radius on AA 5754 sheet

Cited by 40 publications

References 11 publications

Selection of design parameters of working coil for Al/Cu tubular Magnetic Pulse Welding

Selection of design parameters of working coil for Al/Cu tubular Magnetic Pulse Welding

Effect of heat treatment conditions on stamping deformation and springback of 6061 aluminum alloy sheets

Geometric issues in V-bending electromagnetic forming process of 2024-T3 aluminum alloy

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