The following three conditions must be met for EDM:

Pulse power must be used;

An automatic feed adjustment device must be used to maintain the tiny discharge gap between the tool electrode and the workpiece electrode;

Spark discharge must be carried out in a liquid medium with a certain dielectric strength (10～107Ω·m).

EDM has the following characteristics:

It can process any conductive material with high strength, high hardness, high toughness, high brittleness and high purity; edm machining service， There is no obvious mechanical force during processing, and it is suitable for processing low-rigidity workpieces and microstructures: pulse parameters can be adjusted according to needs, and rough machining, semi-finishing and finishing can be performed on the same machine tool;

The pits on the surface after EDM are conducive to oil storage and noise reduction; the production efficiency is lower than cutting processing; part of the energy is consumed in the tool electrode during the discharge process, which leads to electrode loss and affects the forming accuracy.



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