Self-inductive-internal flushing liquid electric spark processing method for metal with insulating ceramic coating

The invention relates to a self-inductive-internal flushing liquid electric spark processing method for metal with an insulating ceramic coating, belonging to the technical field of electric spark processing and forming. In order to solve the technical problem that the metal with the insulating ceramic coating cannot be processed with high quality and high efficiency, the invention provides the self-inductive electric spark processing method, and on the basis, a processing form of the internal flushing liquid of a rotating electrode is adopted. The whole processing process is carried out in an oil-base working liquid. The tubular electrode rotates around the axis and is assisted by a high pressure flushing liquid in an inner hole of the electrode, and flushing by the working liquid has good chip removal effect. A conductive material is arranged on the surface of the insulating ceramic coating, and the conductive material is connected to the positive electrode of a power supply. In the initial processing stage