Research on a two-stage discharge current regulation method in RT-WEDM

Gao, Qiang; Li, Zilun; Zhang, Yaou; Xi, Xue-Cheng; Yang, Fei; Zhao, Wan-Sheng

doi:10.1007/s00170-022-10414-w

Cited by 3 publications

(1 citation statement)

References 22 publications

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“…Based on the wire running system, WEDM can be classified into two technologies: low-speed WEDM (LSWEDM) and high-speed WEDM (HSWEDM). Due to its ability to process workpieces of any hardness and its high material utilization efficiency, WEDM has become an indispensable technology in industries such as mold manufacturing [1], automobile manufacture [2], biomedicines [3] and aerospace [4]. In some industries, large annular metal workpieces need to be cut into multiple parts according to design specifications, and WEDM is the primary method employed.…”

Section: Introductionmentioning

confidence: 99%

Enhancing Cutting Rates in Multi-Channel HSWEDM of Metal Materials with a Novel Decoupling Circuit

Su,

Zhang,

et al. 2023

Micromachines

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Multi-channel high-speed wire electrical discharge machining (HSWEDM) has shown great potential in enhancing the cutting rate of metal workpieces. However, the mechanism of multi-channel discharges in this technique remains unclear. In this paper, the equivalent circuit and processing model of the multi-channel HSWEDM were developed to investigate the discharge characteristics. It was found that the equipotential between electrodes is the primary factor causing electrical signal coupling between channels, hindering the achievement of synchronous discharge. To address this issue, a novel power supply with a decoupling circuit was devised. By utilizing the combined effect of electrode wire resistance and current limiting resistance (Rc), a potential difference was induced between electrodes in different channels, enabling electrical signal decoupling and facilitating synchronous discharge. The impact of Rc on synchronous discharge was examined, revealing that a reduction in Rc can increase the gap voltage of non-breakdown channels, thereby enhancing the discharge ratio. Finally, cutting rate experiments were conducted. When the new power supply was used for electrical signal decoupling, the cutting rates of multi-channel WEDM were significantly improved. Compared to single-channel HSWEDM, the cutting rates of two-channel and four-channel HSWEDM are enhanced by 84.06% and 247.83%, respectively.

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