| Micro EDM(electric discharge machining) is a kind of special machining technique for micro machining .It has the pivotal status in the domain of micro machine as well as the micro structure processing . Micro-energy RC pulse generator obtains massive applications in micro EDM because of its simplicity and reliability .To raise the processing scale and the efficiency, this article has carried on the related numerical simulation and experimental study, and has made some progress in the fundamental research as well as the engineering application.Main content of this article is as follows:1. In view of micro-energy RC pulse generator, physical model of the electric field in the interelectrode has been established. Using the numerical simulation method, electric field distribution influenced by the electrode geometry and the machining polarly has been discussed. Also, the related electric field distributed rule of the micro EDM has been got.2. According to heat transfer theory, the thermal physical model of work piece's surface in micro EDM has been established, using the numerical simulation method, considering some factors influenced along with the changing of temperature such as the thermal natural parameter, the heat convection, the latent heat and so on, the temperature field distribution of the work piece's surface has been grasped, and distributed rule of the interelectrode temperature field in micro EDM has been obtained.3. Basing the research foundation above, using the micro electric chemical machining to manufacture columnar tungsten electrode on-site, choosing the reasonable technological parameter, micro EDM experiments have been carried on. Also, the influence to the working accuracy and the efficiency caused by electrical parameter has been analyzed. What's more, three groups optimized electrical parameter have been obtained to apply in the different manufacturing places.
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