Experiment Analysis Research on Electrical Discharge Machining Polycrystalline Diamond Tool

As the hardest material in the field of synthetic materials, polycrystalline diamond has been paid more and more attention in the field of tools, which embody the basic characteristics of "high efficiency, precision and flexibility" of modern advanced cutting technology and cleaner production. Electrical discharge machining is typically used in processing polycrystalline diamond tools, especially in the machining of special shape, thin and fine cutting tools. In this paper, 2 micrometer and 10 micrometer polycrystalline diamonds are taken as the research object, and the surface quality of the disc electrode and wire electrode is simply compared by means of process and material test. The effects of diamond particle size, electrode polarity and electrode speed on the surface quality and the material removal rate of precision electrical discharge machining polycrystalline diamond are studied. The results show that there is no porous structure and no selectivity in discharge etching when the negative polarity electrode machine is used. With the increase of electrode rotation speed, the removal amount of polycrystalline diamond increases gradually, while the surface roughness of polycrystalline diamond decreases first and then increases. When the electrode linear velocity reaches 80 m/min, the surface roughness of polycrystalline diamond sample reaches the minimum value, and the removal amount of polycrystalline diamond material tends to be stable.