EDM is suitable for the processing of complex parts such as precision small cavities, narrow slits, grooves, corners, etc. When the tool is difficult to reach the complex surface, in the need for deep cutting, in the long diameter ratio is particularly high, the EDM process is better than milling. For the processing of high-tech parts, milling electrode re-discharge can improve the success rate, compared to the high cost of expensive tools, discharge machining is more appropriate. In addition, where electric discharge finishing is specified, electric discharge machining is used to provide a flare surface.
Today, with the rapid development of high-speed milling, the development space of EDM has been squeezed to a certain extent. At the same time, high-speed milling has also brought greater technological progress to EDM. Such as: the use of high-speed milling to manufacture electrodes, due to the realization of small area processing and high-quality surface results, so that the number of electrode design is greatly reduced. In addition, the use of high-speed milling to manufacture electrodes can also increase the production efficiency to a new level, and can ensure the high precision of the electrode, so that the accuracy of EDM is also improved. If most of the processing of the cavity is completed by high-speed milling, EDM is only used as an auxiliary means to clean the corners and trim the edges, so that the amount of retention is more uniform and less.
Precision discharge machine in the processing area of less than 20 square centimeters, can achieve Ra0.1m mirror EDM, and achieve uniform matt surface and all levels of surface processing. For fine parts, such as connectors, the angle can be less than 0.02mm.