This article explains the types and characteristics of EDM.
Please check the following articles for the advantages and disadvantages of electric discharge machining.

>>Related article: What is EDM, and its advantages and disadvantages?

Features of EDM

By using wire or shaped electrodes, even complex shapes can be machined with high precision. In addition, even high hardness materials, such as cemented carbide, can be processed if it is conductive. By correctly shaping the electrodes, it is possible to accurately process things that are difficult to achieve with other processing methods, such as small diameter processing and complex pocket shapes. Furthermore, products can be processed as a single piece with no need of dividing, so the number of parts can be reduced and strength can increased.

Types of EDM

There are three main types of EDM: WEDM, die-sinking EDM, and small hole EDM.

WEDM

This is a processing method that uses wire-shaped electrodes that are sequentially sent out to carve out the required shape from the workpiece like a coping saw.

Die-sinking EDM

This is a processing method of making the shape of electrode into the workpiece by electric discharge. The processing shape is determined by the specific shape of the electrode.

Small hole EDM

This is a processing method that uses a very thin pipe or round bar as an electrode to make a hole in the work piece. It is mainly suitable for machining small diameter holes such as start holes in the workpiece for WEDM.

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We have the know-how to analyse and investigate the wear and deterioration of cemented carbide moulds and toolings, identify the causes of defects from the results, and propose the most suitable machining method for the identified causes, based on past experience of improvement cases and theoretical perspectives.

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