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Micro-machining of components has been emerged as a peak demand in the world of micro-manufacturing. Micro-EDM is proved to be the most suitable for micro drilling purposes. It is very essential to fabricate micro holes as well as features with very high dimensional accuracy and precision. The major drawbacks in micro-EDM processes are the low metal removal, tool wear and surface roughness. Researchers have carried out several investigations to compensate the various machining problems in the micro-EDM process. So, there evolves a need for development of more sophisticated machining features in micro-EDM process combining with additional techniques. This paper presents a brief review on the latest advancement in ultrasonic vibration and magnetic field assisted techniques to improve machining efficiency and surface qualities of machined features in micro-EDM process. Latest industrial applications of micro-EDM have been presented.

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Micro-EDM is most widely used for developing perfect drilled micro features/parts. Research was carried out to improve the material removal and tool wear of any conductive machined product by EDM and micro-EDM process. In this chapter, RSM was used for designing the experiments with 20 set of experiments. In this present research work, performance characteristics like MRR and Overcut have got a different level of importance. Here the stress was given on MRR rather than on OC. In this MCDM analysis, the weight of MRR is considered to be maximum (i.e., larger is better), and other weights of other responses are considered to be the minimum (i.e., smaller is better). Finally, in the midst of all the combinations of process parameters considered one that acquires the highest grey relational grade is the best parametric combination. The research findings in the area of machining of stainless steel 304 will be helpful to manufacturing engineers for selecting the optimized parametric combinations of micro-EDM process with stainless steel.