Electromagnetic Force Distribution and Forming Performance in Electromagnetic Forming With Discretely Driven Rings

Qiu, Li; Yi, Ningxuan; Abu-Siada, A.; Tian, Jinpeng; Fan, Yuwei; Deng, Kui; Xiong, Qi; Jiang, Jinbo

doi:10.1109/access.2020.2967096

Cited by 32 publications

(18 citation statements)

References 22 publications

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“…A schematic diagram of the basic principle of the EMF process is shown in Figure 1. The capacitor power supply is used to discharge stored electrostatic energy to the driving coil to generate a pulse current which induces eddy current in the metal workpiece [18]- [20]. The coil pulsed current interacts with the workpiece induced eddy current to generate a pulsed electromagnetic force.…”

Section: Basic Principlementioning

confidence: 99%

Research on Forming Efficiency in Double-Sheet Electromagnetic Forming Process

et al. 2020

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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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Section: Basic Principlementioning

confidence: 99%

Research on Forming Efficiency in Double-Sheet Electromagnetic Forming Process

et al. 2020

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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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“…Nevertheless, due to the non-axisymmetric structure of the helical coil, it is very difficult to establish the actual helical coil model, which eventually leads to a sharp increase in the high precision calculation of the magnetic field, and the simulation results cannot converge. Hence, researchers usually use software such as COMSOL [12][13][14] , ANSYS/MEGA [15][16] and LS-DYNA [17][18] to analyze the magnetic field by equating the solenoid coil model with a 2-D or 3-D axisymmetric model. What's more, these studies mainly focus on aspects such as electromagnetic bulging [19][20] , electromagnetic welding [21][22] , electromagnetic superposed forming [23] , and the electromagnetic-assisted forming [24][25] .…”

Section: Introductionmentioning

confidence: 99%