Prototype machine for micro-EDM

Abstract

This chapter presents constructive details for a micro-electrical discharge machine that is adequate to study the fundamentals of the process and to educate upcoming engineers in the latest industrial technologies. The machine was designed, fabricated, and instrumented by the authors and consists of a rigid structure, electrical and electronic components, a dielectric flowing system, and positioning control devices. The machine operates with low voltage, low energy, and high-frequency short electrical pulses and makes use of tool electrodes that are capable of drilling holes with diameters in the micrometer range. The presentation provides constructive details for those readers who may be interested in developing an in-house μEDM and puts emphasis on its adequacy for investigating the influence of operative parameters on electrical spark discharges, morphology of craters, and material removal mechanisms.