The processing method of electrical discharge machining (EDM) is relatively special compared to others. It can be used for triangular holes and porous materials, especially some hard materials like steel. Therefore, EDM occupies an important position in the processing industry. Currently, there are many EDM machine manufacturers, with high technical content and low costs, making it difficult to ensure product quality. In the processing of EDM machines, parts need to be processed more regularly and smoothly. How can we judge the discharge state?

1. The discharge machining machine consists of many microstructures of single pulse discharge processes. During the normal single pulse discharge process, an ionized medium forms a discharge channel between breakdowns. The instantaneous temperature in the vaporization discharge channel of the working fluid causes cracking, melting, and evaporation of the metal material. High pressure causes the instantaneous machining debris to be thrown into the working fluid. When the pulse discharge is completed, the ionized medium between the magnetic poles restores the process of insulation.

2. The stability of the discharge state of the EDM machine is closely related to the processing quality and is one of the determining factors for processing effects. Therefore, achieving safe and stable electrical discharge machining has always been a concern for engineering technicians and a hot topic in the field of EDM. This article discusses the phenomenon of unstable discharge in EDM based on years of experience, analyzes the causes of unstable discharge, and proposes improvement measures.