What are the Physical Principles of Wire Electrical Discharge Machining?
May. 12, 2021
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Wire Electrical Discharge Machining, which belongs to the category of electrical machining, was studied by the former Soviet Union Lazarenko and his wife when they studied the phenomenon and causes of switch contacts damaged by spark discharge. They found that the instantaneous high temperature of electric sparks can melt and oxidize local metals. Corroded away, thus pioneering and inventing the EDM method. The wire cutting machine was also invented in the former Soviet Union in 1960. my country was the first country to be used in industrial production.
Servo Control Wire-cutting EDM Machines
Principles of Physics
Free positive ions and electrons accumulate in the field and quickly form an ionized conductive channel. At this stage, a current is formed between the two plates. Resulting in countless collisions between the particles, forming a plasma zone, which quickly rises to a high temperature of 8000 to 12000 degrees, instantaneously melting some materials on the surfaces of the two conductors, and at the same time, due to the vaporization of the electrode and the dielectric fluid, a bubble is formed. And its pressure rises regularly until it is very high. Then the current is interrupted and the temperature drops suddenly, causing the bubbles to explode inwardly. The generated power throws the melted material into 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 servo mechanism executes to make this discharge phenomenon uniform.
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