What is a Electrical discharge machine?

An electric discharge machine is a machine tool that melts and processes a workpiece with the heat generated by arc discharge. If the work piece is made of a material that conducts electricity, it has the characteristic of being able to be processed regardless of hardness, and is mainly used for metal processing. Electric discharge machining is a method in which electric discharge is performed between an electrode in a liquid and the work piece, the work piece is melted by heat, and the melted part is cooled by the liquid and scattered. By processing high hardness materials, even if the blade does not stand up in the cutting process, it can be processed into a precise shape.

Application of Electrical discharge machine

What is difficult to process with conventional processing methods can be done with electric discharge machining. First, there are applications for processing high-hardness materials. Hexagonal holes, keyways, and cornering are not limited to cutting tools.
In screw machining, if you forget to machine and quench, etc., you will post-machin the screw by electric discharge machining. In addition, electric discharge machining is used for drilling small diameter deep holes, which is not possible with drilling. Diagonal holes can also be easily machined. A test piece with minute defects, called an artificial defect, is made by electric discharge machining. As another example, electric discharge machining is suitable for machining fine gears with high precision. Wire electric discharge machining using a thin wire finishes the involute line neatly and makes the hole in the center a perfect circle.

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