The objective of this paper is to study the time-evolution of the process mechanics for micro-electrical discharge machining (MEDM) and reverse-micro-electrical discharge machining (R-MEDM), as a function of key system parameters, viz., voltage, capacitance, and threshold of the spark circuit. Full factorial experiments have been performed to quantify the aforementioned system parameters on the MEDM and R-MEDM processes. The process monitoring voltage and current signals, material erosion rate and the surface roughness values are the machining responses of interest. The voltage and current (V-I) signals reveal information about the material erosion rate and the extent of debris-interference associated with the corresponding process. Analysis of the V-I signals shows that R-MEDM is more stable than MEDM and can therefore be operated at aggressive conditions of capacitance and voltage. R-MEDM also results in higher material erosion rates but the resulting surface has a higher surface roughness value than that generated by MEDM. A debris deposition mechanism is proposed for R-MEDM that suggests debris entrapment and subsequent welding to the machined feature to be the reason for the increased surface roughness.
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ASME 2011 International Manufacturing Science and Engineering Conference
June 13–17, 2011
Corvallis, Oregon, USA
Conference Sponsors:
- Manufacturing Engineering Division
ISBN:
978-0-7918-4431-1
PROCEEDINGS PAPER
Comparative Analysis of the Process Mechanics in Micro-Electrical Discharge Machining (EDM) and Reverse Micro-EDM Available to Purchase
Sachin Mastud,
Sachin Mastud
Indian Institute of Technology Bombay, Mumbai, MH, India
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Ramesh K. Singh,
Ramesh K. Singh
Indian Institute of Technology Bombay, Mumbai, MH, India
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Johnson Samuel,
Johnson Samuel
Indian Institute of Technology Bombay, Mumbai, MH, India
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Suhas S. Joshi
Suhas S. Joshi
Indian Institute of Technology Bombay, Mumbai, MH, India
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Sachin Mastud
Indian Institute of Technology Bombay, Mumbai, MH, India
Ramesh K. Singh
Indian Institute of Technology Bombay, Mumbai, MH, India
Johnson Samuel
Indian Institute of Technology Bombay, Mumbai, MH, India
Suhas S. Joshi
Indian Institute of Technology Bombay, Mumbai, MH, India
Paper No:
MSEC2011-50122, pp. 349-358; 10 pages
Published Online:
September 14, 2011
Citation
Mastud, S, Singh, RK, Samuel, J, & Joshi, SS. "Comparative Analysis of the Process Mechanics in Micro-Electrical Discharge Machining (EDM) and Reverse Micro-EDM." Proceedings of the ASME 2011 International Manufacturing Science and Engineering Conference. ASME 2011 International Manufacturing Science and Engineering Conference, Volume 2. Corvallis, Oregon, USA. June 13–17, 2011. pp. 349-358. ASME. https://doi.org/10.1115/MSEC2011-50122
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