Bipolar nano-second pulse power supply for electrochemical micromachining of tungsten carbide without tool wear

Zhang, Qingrong; Luo, Hong; Liu, Peng; Liu, Guixian; Zhang, Yongjun

doi:10.1016/j.procir.2022.09.202

Cited by 4 publications

(2 citation statements)

References 10 publications

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“…Therefore, one of the most effective approaches to enhance machining precision is to intensify the relationship between double layer and input signal. The micro-holes on the surface of tungsten carbide were machined effectively by the ECM method with sacrificial auxiliary electrodes employing bipolar current [21]. Additionally, a circuit model of electrochemical double layer charging and discharging is constructed, as well as the variation of electrolyte red electric field.…”

Section: Introductionmentioning

confidence: 99%

Micromachining of nickel and nickel-based alloy surfaces using composite signal

Wang,

Peng

2023

J. Micromech. Microeng.

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Electrochemical micromachining refers an unconventional technology in the field of machining. With this technology, the ultrashort pulse power supplies are extensively used to address the issue of excessive machining of non-processing areas. However, the reduction of pulse duration is the only effective strategy to enhance the processing accuracy in ultra-short pulse electrochemical microfabrication. Nonetheless, the high cost of equipment and unsuitability in practical production has limited its progress. To resolve this issue, this paper proposes the use of a composite signal in electrochemical micromachining instead of ultrashort pulses. By changing the signal waveform during machining, the energy required for processing can be reduced with the same electromotive force input, thereby reducing the current used to decompose the anode in the circuit and effectively improving machining accuracy. This approach was employed to manufacture micro-structures on a pure nickel sheet, achieving micron-scale accuracy. Moreover, the same level of superior machining accuracy can be achieved when machining micro-structures on hard-to-cut super alloy plates.

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Section: Introductionmentioning

confidence: 99%

Micromachining of nickel and nickel-based alloy surfaces using composite signal

Wang,

Peng

2023

J. Micromech. Microeng.

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“…EMM is considered a cutting-edge micro manufacturing method that uses electrochemical anodic dissolution to remove material from a workpiece. This approach offers numerous benefits, including a high material removal rate, and the avoidance of residual mechanical stress on the workpiece [19][20][21][22]. In recent years, EMM has developed and diversified, resulting in various methods, including electrochemical jet machining (EJM).…”

Section: Introductionmentioning

confidence: 99%

Fabrication of Micro-Dimple Arrays by EMM and RUREMM on Cylindrical Surface

Tong

et al. 2023

Processes

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To achieve high precision, stability, and good surface quality when producing micro-dimple arrays on cylindrical surfaces, we propose a new processing method known as radial ultrasonic rolling electrochemical micromachining (RUREMM) in this study. This method is based on the electrochemical micromachining (EMM) and ultrasonic machining principle. The relevant simulation model was created, and ANSYS researched the flow field characteristics of the electrolyte between the array electrodes and the workpiece. Micro-dimple arrays were created on a SS304 cylindrical surface with the consideration of the effects of the machining parameters, including ultrasonic amplitude and applied pulse voltage. Compared with the EMM, the average width of the micro-dimples is reduced by 24.5%, the aspect ratio of the dimple is increased by 108.0%, and the surface roughness of micro-dimples is decreased by 59.7%. In addition, the localization and the surface quality of micro-dimples by RUREMM can be improved when using appropriate machining parameters.

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