Advancements of micro-EDM

This paper studied and summarized the state of the art of micro-EDM systemically. The technical characteristics and application between common micro machining and micro-EDM are compared and analysed. And then the principle and its application of wire electrode discharge grinding (WEDG) in micro machining are discussed. Because there is no macro force during EDM, this paper introduces the feasibility and mostly form of miniaturizated EDM apparatus.