An inner-field uniform pressure actuator with high performance and its application to titanium bipolar plate forming

Wu, Zelin; Cao, Quanliang; Fu, Junyu; Li, Zhangzhe; Wan, Yizhou; Chen, Qi; Li, Liang; Han, Xiaotao

doi:10.1016/j.ijmachtools.2020.103570

Cited by 31 publications

(10 citation statements)

References 24 publications

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“…Wu et al. [17] further developed a new type of uniform pressure actuator by changing the position of the coil and the conductive channel. They demonstrated that the new actuator can improve both forming efficiency and operating life.…”

Section: Introductionmentioning

confidence: 99%

“…Kamal and Daehn [16] developed a uniform pressure actuator, which consists of an inner coil and an outer conductive channel. Wu et al [17] further developed a new type of uniform pressure actuator by changing the position of the coil and the conductive channel. They demonstrated that the new actuator can improve both forming efficiency and operating life.…”

Section: Introductionmentioning

confidence: 99%

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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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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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

et al. 2021

Self Cite

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“…Solenoid coils have been widely used in various researches due to their advantages of simple manufacture and high magnetic field strength, such as permanent magnet machines [1][2] , electronic transformers [3] , medical implants [4], fluid dynamics [5][6] and Electromagnetic forming (EMF) [7][8][9] . Especially in the study of EMF, it mainly includes four parts: solenoid coil, workpiece, mold, and the external circuit.…”

Section: Introductionmentioning

confidence: 99%

Pitch Effect of Helical Coils of Electromagnetic Forming

Zhang

Zhou

Liang³

et al. 2020

IEEE Access

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“…Based on the processing object [12,13], EMF is divided into tube or plate type process [14][15][16]. In both types, uniformity of workpiece deformation has been a sustained issue that has not been fully resolved yet regardless the several attempts presented in the literature [17,18]. For example, a concave driving coil is proposed in [19].…”

Section: Introductionmentioning

confidence: 99%

Numerical Analysis of Tube Expansion by Electromagnetic Forming Using Magnetic Field Shaper

et al. 2020

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Uneven axial deformation is the current main issue of the tubes electromagnetic bulging technology which calls for innovative and cost-effective solutions. This paper presents a new method to overcome the above-mentioned issue based on employing a magnetic field shaper. The proposed magnetic field shaper is employed in the middle of the pipe and the driving coil. Induced eddy current control is realized by changing the structural parameters of the magnetic field shaper; thereby regulating the electromagnetic force distribution. The effectiveness of the proposed method is investigated through numerically comparing the electromagnetic performance of two EMF setups; traditional coil-based loading model and magnetic field shaper driving coil-based loading model proposed in this paper. The influence of the magnetic field shaper structural parameters on the tube electromagnetic forming performance is examined for optimum structure design. Results reveal that the concave profile of the radial electromagnetic force in the traditional loading method can be effectively improved using the proposed loading in this paper. The introduction of a magnetic field shaper not only changes the induced eddy current distribution, but also regulates the electromagnetic force profile in the axial-direction of the pipe which effectively enhances the uniform range of the pipe electromagnetic bulging, the maximum uniform deformation area is increased from 9mm to 35mm.

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An inner-field uniform pressure actuator with high performance and its application to titanium bipolar plate forming

Cited by 31 publications

References 24 publications

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

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

Pitch Effect of Helical Coils of Electromagnetic Forming

Numerical Analysis of Tube Expansion by Electromagnetic Forming Using Magnetic Field Shaper

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