Microholes are widely used in industrial products, such as engine nozzles and filters for biomedical industry. Electrical discharge machining (EDM) is one of processes to drill microholes in alloy with high aspect ratio. However, the achievable aspect ratio of a microhole by micro-EDM is limited. To improve the aspect ratio of a microhole drilled by micro-EDM, the planetary movement of electrode is applied during machining. It was found that the machining efficiency of microhole drilling can be further improved by proper setting of planetary movement of electrode, such as the electrode feed rate and movement speed of electrode in XY plane. In this paper, a theoretical model is proposed to optimize parameters of the planetary movement of electrode. Microholes are drilled aided with planetary movement using different machining parameters to verify the model. Experimental results agree with theoretical values, which indicate the validity of the proposed model. This model provides certain theoretical basis for machining parameter selection when microholes are drilled aided with planetary movement.
Optimization of Planetary Movement Parameters for Microhole Drilling by Micro-Electrical Discharge Machining
Machining Technology of Ministry of Education,
School of Mechanical Engineering,
Dalian University of Technology,
Graduate School of Engineering,
Tokyo University of Agriculture and Technology,
Contributed by the Manufacturing Engineering Division of ASME for publication in the JOURNAL OF Micro- AND Nano-Manufacturing. Manuscript received May 11, 2013; final manuscript received July 25, 2013; published online August 13, 2013. Assoc. Editor: Hitoshi Ohmori.
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Guo, X., Yu, Z., Lv, Z., Li, J., and Natsu, W. (August 13, 2013). "Optimization of Planetary Movement Parameters for Microhole Drilling by Micro-Electrical Discharge Machining." ASME. J. Micro Nano-Manuf. September 2013; 1(3): 031007. https://doi.org/10.1115/1.4025160
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