A comparison of the machining performance of micro-electro-discharge machining (EDM) milling and sinking is proposed considering the fabrication of microchannels with controlled sloped walls realized in a hardened steel workpiece. Adopting the fine-finishing machining regime for both micro-EDM techniques, the experimental results show that micro-EDM sinking is about ten times faster than milling in the worst case, though a lack of accuracy in the final microfeatures in the former case is detected due to not compensated tool wear. On the contrary, micro-EDM milling provides a better control of the microchannel dimensions. Finally, a microfilter mold for medical applications is machined in order to show the potential of the combination of both technologies.
A New Process Combining Micro-Electro-Discharge-Machining Milling and Sinking for Fast Fabrication of Microchannels With Draft Angle
Contributed by the Manufacturing Engineering Division of ASME for publication in the JOURNAL OF MICRO- AND NANO-MANUFACTURING. Manuscript received July 20, 2015; final manuscript received December 16, 2015; published online January 18, 2016. Assoc. Editor: Martin Jun.
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Modica, F., Basile, V., Marrocco, V., and Fassi, I. (January 18, 2016). "A New Process Combining Micro-Electro-Discharge-Machining Milling and Sinking for Fast Fabrication of Microchannels With Draft Angle." ASME. J. Micro Nano-Manuf. June 2016; 4(2): 024501. https://doi.org/10.1115/1.4032324
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