The copper electrode of the EDM machine, Also known as CNC machining of copper electrode mirror. It is an indispensable part in the processing of EDM machine.
During EDM machining, the copper electrode and the workpiece are respectively connected to the two poles of the pulse power supply. The pulse voltage applied to the copper electrode and the workpiece generates spark discharge. The instantaneous temperature of the discharge can be as high as 10,000 degrees Celsius, and the high temperature makes the surface of the workpiece partially vaporized or melted.
Immediately after the next pulse voltage, a spark discharge is generated between the copper electrode and the workpiece, and the above process is repeated.
Through countless repetitive pulse discharges, a shape corresponding to the shape of the electrode is finally processed. Therefore, as long as the shape of the copper electrode is changed, various complicated profiles can be processed.
In EDM machining, the role of the copper electrode is to transmit processing pulses and to remove the workpiece with the minimum loss of the copper electrode itself. Commonly used electrode materials are copper, graphite, copper-tungsten alloy, silver-tungsten alloy, steel, brass, cast iron, etc.