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<p>To improve the machining efficiency and dimensional accuracy of deep hole drilling, a novel and efficient method of short electric arc drilling (SEAD) using a tube electrode is proposed. However, efficient and high-precision deep hole machining is challenging due to the mismatch between excessive arc discharge energy and feed rate. This paper explores the SEAD mechanism based on a pulsed power supply and analyzes the voltage-current waveforms and cross-sectional topography. The effects of electrode polarity, voltage, pulse frequency, duty cycle, and feed rate on material removal rate (MRR), relative electrode wear ratio (REWR), average diameter, taper, and recast layer thickness are investigated. Optimal process parameters were identified through experimental optimization, confirming SEAD’s machining performance. The results show that SEAD achieved a maximum MRR of 369.02&#xa0;μm/s, with a machining time of only 121.91&#xa0;s using optimal parameters. The average diameter of the machined deep hole was 1264.56&#xa0;μm, with a depth of 44.99&#xa0;mm and a depth-to-diameter ratio of 35.57.</p>

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High speed short electric arc deep hole drilling experimental study based on tube electrode

  • 期刊论文

  • 发表日期：

    2025年6月13日

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  • Guoyu Hu,
  • Fei Fu,
  • Shengsheng Zhang,
  • Wei Gao,
  • Junfeng Zhang,
  • Jiahao Wang

摘要

To improve the machining efficiency and dimensional accuracy of deep hole drilling, a novel and efficient method of short electric arc drilling (SEAD) using a tube electrode is proposed. However, efficient and high-precision deep hole machining is challenging due to the mismatch between excessive arc discharge energy and feed rate. This paper explores the SEAD mechanism based on a pulsed power supply and analyzes the voltage-current waveforms and cross-sectional topography. The effects of electrode polarity, voltage, pulse frequency, duty cycle, and feed rate on material removal rate (MRR), relative electrode wear ratio (REWR), average diameter, taper, and recast layer thickness are investigated. Optimal process parameters were identified through experimental optimization, confirming SEAD’s machining performance. The results show that SEAD achieved a maximum MRR of 369.02 μm/s, with a machining time of only 121.91 s using optimal parameters. The average diameter of the machined deep hole was 1264.56 μm, with a depth of 44.99 mm and a depth-to-diameter ratio of 35.57.