Coil Temperature Rise and Workpiece Forming Efficiency of Electromagnetic Forming Based on Half-Wave Current Method

Qiu, Li; Wang, Chenglin; Abu-Siada, A.; Xiong, Qi; Zhang, Wang; Wang, Bin; Yi, Ningxuan; Li, Yantao; Cao, Quanliang

doi:10.1109/access.2020.2965254

Cited by 26 publications

(17 citation statements)

References 21 publications

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“…At the same time, an induced eddy current is generated in the tube outside the driving coil. The interaction between pulsed current and the tube induced eddy current drives the tube to accelerate and achieve bulging [19][20][21]. Owing to the interaction of the magnetic flux and the induced eddy current of the tube, a huge Lorentz force is generated.…”

Section: Basic Principles Of Electromagnetic Forming and The Propmentioning

confidence: 99%

Parametric Simulation Analysis of the Electromagnetic Force Distribution and Formability of Tube Electromagnetic Bulging Based on Auxiliary Coil

et al. 2020

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Tube electromagnetic bulging has been given much attention due to its superior advantages in the field of light alloy processing. However, the conventional tube electromagnetic bulging process exhibits some critical issues that restrict its wide industrial applications. This includes non-uniform axial deformation and poor forming performance such as wall thickness thinning. This paper proposes a costeffective solution for such issues through simultaneous radial and axial electromagnetic force loading using an auxiliary driving coil. In this regard, the influence of the auxiliary coil geometrical parameters on the electromagnetic force distribution and tube forming performance is investigated using electromagneticstructure coupling model of the bulging process. The robustness of the new proposed method is validated by comparing its electromagnetic force distribution and tube forming performance with the traditional cylindrical coil method, currently used by industry practice. Numerical results show that the introduction of the auxiliary coil may effectively weaken the radial electromagnetic force at the end of the tube and solve the uneven axial deformation issue. Based on the obtained results, the maximum uniform deformation area is increased from 6.9mm to 35.1mm. The tube relative wall thinning issue is reduced and the relative wall thickness reduction of the pipe is found to be 0.01661. The axial electromagnetic force can be further improved by adjusting the geometrical parameters of the coil and the proposed electromagnetic bulging can effectively increase the uniform deformation range of the tube.

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Section: Basic Principles Of Electromagnetic Forming and The Propmentioning

confidence: 99%

Parametric Simulation Analysis of the Electromagnetic Force Distribution and Formability of Tube Electromagnetic Bulging Based on Auxiliary Coil

et al. 2020

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“…A pulsed electromagnetic force is generated as a result of the interaction between the two currents. The generated electromagnetic (EM) force speeds-up the plate to accomplish the required formation [27]. Traditional flat coils will simultaneously produce axial and radial magnetic flux in the vicinity of the plate [7].…”

Section: Emf Principle and The Proposed Topologymentioning

confidence: 99%

“…Electromagnetic-forming is a high-strain rate deformation process, with stress-strain characteristics reported in [27]. In this paper, Cowper-Symonds material is used to simulate the AA5083-O plate and analyze its deformation process.…”

Section: ) Mechanical Fieldmentioning

confidence: 99%

Study of a Topology for Plate Electromagnetic Forming Based on Inner Reverse and Outer Positive Double Coil Loading

et al. 2020

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While electromagnetic forming is widely used for aluminum alloy materials, the nonuniformity of plate radial deformation is still a key issue that restricts the wide development of this technology. This paper presents a new electromagnetic-forming topology. The proposed topology comprises outer ring double-coil plates along with an inner loop driving coil of a small number of turns whose geometrical parameters are optimized to adjust the induced eddy current of the plate. Numerical simulation results show that the presence of an inner ring driving coil shapes the magnetic field in a manner that the radial electromagnetic force is concentrated close to the edge of the die which affects the center of the plate. With optimum design for the geometrical parameters of the proposed inner ring driving coil, the electromagnetic force distribution can be adjusted over the plate, resulting in an improved plate deformation with an increase in the maximum uniform deformation area from 24mm to 65mm. Results also show that the proposed inner and outer ring double coil loading method possesses superior advantages over the traditional flat spiral coil loading method.

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“…Electromagnetic forming (EMF) is an industrial technology that uses high speed pulsed electromagnetic force to achieve a forming process for metal material [1]- [3]. The electromagnetic forming technology features high strain rate (10 3 − 10 5 s −1 ) and hence [4]- [7], it can improve the material plastic deformation ability and increase the forming limit by 5 to 10 times when compared to traditional machining processing [8]- [9]. Moreover, as the process does not involve any workpiece contact force, EMF technology features reduced stress on the workpiece and high surface quality of the resulted product [10]- [12].…”

Section: Introductionmentioning

confidence: 99%

Research on Forming Efficiency in Double-Sheet Electromagnetic Forming Process

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Improving the forming efficiency at a reasonable cost has been the main challenge in the electromagnetic forming technology. Towards this aim, this paper proposes a simultaneous cost-effective double-sheet electromagnetic forming method using single driving coil. In order to highlight the features of the proposed technique, comparison of the performance of five electromagnetic forming models is presented. These models include a no-sheet model, single-sheet stationary model, single-sheet moving model, doublesheet stationary model and double-sheet moving model. For each model, electromagnetic force distribution and forming efficiency of the workpiece are analyzed. Furthermore, the influence of the pulse current width of the driving coil on the electromagnetic forming efficiency of the plate is investigated for all models. Results show that for the same system discharge parameters, electromagnetic forming efficiency of doublesheet is 21.14% whereas the single-sheet electromagnetic forming model only achieves 14.68% efficiency. Thus, the double-sheet electromagnetic forming technology can improve the low forming efficiency of a single-sheet electromagnetic forming method and at the same time, the method can form two workpieces simultaneously which makes it more cost effective than the single-sheet method. INDEX TERMS Electromagnetic force, electromagnetic forming technology, double-sheet model, forming efficiency.

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Coil Temperature Rise and Workpiece Forming Efficiency of Electromagnetic Forming Based on Half-Wave Current Method

Cited by 26 publications

References 21 publications

Parametric Simulation Analysis of the Electromagnetic Force Distribution and Formability of Tube Electromagnetic Bulging Based on Auxiliary Coil

Parametric Simulation Analysis of the Electromagnetic Force Distribution and Formability of Tube Electromagnetic Bulging Based on Auxiliary Coil

Study of a Topology for Plate Electromagnetic Forming Based on Inner Reverse and Outer Positive Double Coil Loading

Research on Forming Efficiency in Double-Sheet Electromagnetic Forming Process

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