Influence of high frequency pulse on electrode wear in micro-EDM

摘要

An electromagnetic coupling mathematical model is established by finite element method and is verified by the contrastive experiments of copper matrix NieTiN cylindrical coating electrode, copper electrode and Cu50W electrode. The wear mechanism of NieTiN/Cu composite electrode in the case of high-frequency pulse current is studied, and the influence of the fluctuation frequency of discharge current on electrode wear in micro-EDM is found out. Compared with the electrode made from homogeneous material, the high frequency electromagnetic properties of NieTiN composite layer can be used effectively to inhibit the effect of high frequency pulse on the electrode and improve the distribution trend of current density.