Mechanism and Experimental Research on Small-Hole EDM with Cu-Cr Composite Electrode

During the EDM small hole processing, the material removal rate decreases rapidly with the increasing of processing depth, to analyze the mechanism of process, the fluid field around the processing gap simulation is studied based on Fluent. A solution based on Cu-Cr Composite electrode is put forward, and the influence of voltage of cathode and nonuniform of electric corrosion on the material removal rate and processing precision were analyzed. Some Cu-Cr Composite electrodes were produced; contrast experiments of brass electrodes and Cu-Cr Composite electrodes on material removal rate and processing quality were carried out. The experimental results show that the material removal rate of composite electrodes increase about 2 times and the processing precision is also improved. Copyright © 2014 IFSA Publishing, S. L.