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Experimental analysis of normal spark discharge voltage and current with a RC-type generator in micro-EDM

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Abstract

This paper focused on the experimental analysis of the discharge voltage and current waveforms in micro-EDM with a RC-type generator. A quasi-maintaining voltage assumption was proposed, and the spark gap discharge voltage was modeled as a voltage source in a first-order liner form. The discharge current and the discharge capacitor voltage under different machining conditions were calculated and compared with the real experimental waveforms of good and bad conductive workpiece, respectively. For the good conductive materials, the discharge voltage looked more like a constant maintaining voltage, and for the bad conductive materials, a low resistive ceramics composite and P-type monocrystalline silicon, the gap discharge voltage featured a relatively high average value and a relatively large variation slope rate. Based on the comparisons, the proposed discharge gap model and its simplification simulated the real discharge waveform and can be used for pulse discrimination and pulse energy prediction in micro-EDM.

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Acknowledgements

The authors would also like to acknowledge the constructive suggestions from Prof. Jingyu Pei from Shanghai Jiao Tong University, Dr. Haoran Chen from Nanjing University of Aeronautics and Astronautics, and Dr. Jun Wang and Dr. Cheng Guo from KU Leuven.

Funding

This research has been carried out within the framework of EC projects Hi-Micro (Grant No. 314055), KU Leuven VES F+, and supported by the “National Natural Science Foundation of China,” China, Grant No. 51707095, the “Natural Science foundation of Jiangsu Province,” China, Grant No. BK20160837, and “The Fundamental Research Funds for the Central Universities,” China, Grant No. 30917011333.

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Authors and Affiliations

  1. School of Automation, Nanjing University of Science & Technology, No. 200 Xiaolingwei Street, Nanjing, China

    Fei Yang, Han Hua & Jiao Yang

  2. Department of Mechanical Engineering, KU Leuven & Member Flanders Make, Celestijnenlaan 300 box2420, 3001, Heverlee, Belgium

    Mattia Bellotti, Jun Qian & Dominiek Reynaerts

Authors
  1. Fei Yang
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  2. Mattia Bellotti
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  3. Han Hua
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  4. Jiao Yang
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  5. Jun Qian
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  6. Dominiek Reynaerts
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Correspondence to Fei Yang.

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Yang, F., Bellotti, M., Hua, H. et al. Experimental analysis of normal spark discharge voltage and current with a RC-type generator in micro-EDM. Int J Adv Manuf Technol 96, 2963–2972 (2018). https://doi.org/10.1007/s00170-018-1813-4

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  • DOI: https://doi.org/10.1007/s00170-018-1813-4

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