Wire Cut Electrical Discharge Machining (WEDM)
Electric discharge wire cutting is short for wire cutting. It is developed on the basis of electric spark perforation and forming processing.
It has not only developed the application of EDM, but also replaced EDM punching and forming in some aspects. Nowadays, wire-cut machine tools have accounted for the majority of EDM machine tools.
Wire Cut Electrical Discharge Machining (WEDM), a category of electrical processing, is the former Soviet Union by the Lazarinko couple research switch contact by spark discharge corrosion damage phenomenon and causes, It was found that the transient high temperature of the electric spark could melt, oxidize and corrode the local metal, thus creating and inventing the method of electric discharge machining.
The wire-cutting machine was also invented in 1960 in the former Soviet Union, and China was the first country to use it in industrial production. The basic physical principle is that free positive ions and electrons accumulate in the field and quickly form an ionized conductive channel. At this stage, an electric current forms between the plates. Resulting in numerous collisions between the particles, forming a plasma zone that quickly rises to a high temperature of 8,000 to 12,000 degrees, instantly melting some material on the surface of the two conductors.
At the same time, a bubble is formed due to the vaporization of the electrode and dielectric fluid, and its pressure rises regularly until it is very high. Then the current is interrupted, the temperature drops suddenly, causing the bubble to explode inside, the resulting 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, servo mechanism execution, so that the discharge phenomenon is uniform, so as to achieve the processing material is processed, so that it becomes the required size and shape accuracy of the product.
The Reciprocating type High Speed Wire cut Electrical Discharge can be divided into reciprocating type high speed wire cut electrical discharge Low Speed one-way walk Wire cut Electrical Discharge Low speed one-way walk wire cut electrical discharge Commonly known as "slow Wire" in Machining) and Vertical Wire Electrical Discharge Machining machine tool With Rotation Wire. According to the form of the table can be divided into a single column cross table type and double column type (commonly known as gantry type).
