Electric discharge machining is a special processing method that uses the electric erosion generated by pulsed discharge between two poles immersed in a working fluid to corrode conductive materials. It is suitable for EDM parts or parts with sharp internal corners, complex shapes, ultra-hard, ultra-fragile, and requiring deep machining. Compared with traditional copper electrodes, graphite electrodes have the advantages of light weight, easy processing, no deformation, fast electrical discharge machining speed, low wear rate, and low thermal expansion rate.