Research on development of the new PCD tool made of an electrically-conductive diamond and its processing method

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A new PCD(EC-PCD) made up of electrically conductive diamond particles has good processing characteristics outstanding in EDM, EDG, W-EDM and complex electro-discharge grinding method, compared with the existing commercially available PCD. Electro-discharge forming for a V shape grinding wheel made of EC-PCD is also possible. In this case, the edge of the EC-PCD wheel became very sharp. Furthermore, in the complex electro-discharge grinding by using a metal bonded diamond wheel, it is found that the high-efficient and high-precision processing of PCD would be realizable. The guideline for utilizing an EC-PCD material as a cutter, a grinding wheel, a mold tool, an electrode, and precision parts was acquired.