Effects of ultrasonic vibrations in micro electro-discharge machining of microholes

This research concerns microhole machining capabilities by means of micro electro-discharge machining (MEDM). The limitations of this machining technology as well as the current attempts to improve microhole drilling in this field are investigated. The focus in this study was to develop a novel technique that enhances the capabilities of MEDM for realization of microholes with a high aspect ratio. Based on theories in fluidization engineering and ultrasonic degassing, a method of introducing ultrasonic vibrations into MEDM processes was conceptualized and developed. A comparative analysis has revealed that the new technique can produce a significant increase in the aspect ratios over the current methods of microhole drilling. The potential of the capabilities of ultrasonic vibrations in MEDM drilling is thus emphasized.

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