(1) cnc metal plate edm drilling machine in the processing, the cutting tool (copper wire or molybdenum wire) and the workpiece between 20KHz, 150v DC pulse voltage. Pulse discharge between electrode wire and workpiece. When the distance between the tool and the workpiece is close enough (about 0.01mm), the voltage breakdown cools the cutting fluid medium, the uniform discharge on the full length of the cutting tool and the workpiece, the high energy density discharge temperature can reach 7000℃ or higher, the high temperature makes the cutting metal instantaneously vaporized, the generation of metal oxides, molten in the cutting fluid, and the cutting fluid. Being taken out of the machining area by a moving cutting tool.

(2) The electrode wire moves along its axis (vertical or Z direction).

(3) The workpiece is numerically controlled in the X and Y planes relative to the electrode wire

The basic physical principle is that free positive ions and electrons accumulate in the field and quickly form a conductive channel that is ionized. At this stage, an electric current forms between the two plates. Resulting in numerous collisions between particles, forming a plasma region, and quickly rising to a high temperature of 8,000 to 12,000 degrees, melting some materials instantaneously on the surface of the two conductors, at the same time, due to the vaporization of the electrode and the dielectric fluid, forming a bubble, and its pressure regularly rises until it is very high. Then the current is interrupted, the temperature is suddenly reduced, causing the bubble to explode inside, and the generated power throws the dissolved material out of the crater, and then the corroded material recondenses into small spheres in the dielectric fluid, and is discharged by the dielectric fluid. Then through the monitoring and control of NC control, the servomechanism executes, so that the discharge phenomenon is uniform, so that the processed material is processed, so that it becomes a product with the required size and shape accuracy.

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