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What is Electrical Discharge Machining?


Electrical Discharge Machining (EDM) is a non-traditional machining process that uses electrical energy to remove material from a workpiece. It is also known as spark machining, spark eroding, or die sinking, and it is commonly used to machine complex shapes and features in hard, brittle, or heat-resistant materials.

The EDM process involves the following steps:

1、A conductive workpiece and an electrode, which is typically made of graphite or copper, are submerged in a dielectric fluid.

2、An electrical potential is applied between the workpiece and the electrode, creating a series of sparks that generate intense heat.

3、The heat melts and vaporizes the material at the contact point, creating a small crater in the workpiece.

4、The electrode is slowly lowered into the workpiece, and the process is repeated until the desired shape or feature is created.

5、The dielectric fluid is constantly circulated to flush away the molten material and prevent the electrode from overheating.

EDM offers several advantages over traditional machining methods, including the ability to cut complex shapes and contours with high precision and accuracy. It is also well-suited for machining hard or brittle materials that are difficult to machine with conventional methods. However, EDM can be a relatively slow and expensive process, and the electrodes can wear out quickly, requiring frequent replacements. EDM is used in a wide range of industries, including aerospace, automotive, medical devices, and mold and die making. SJ has many EDM machine senior controller, if there are precision parts to be processed, welcome to the drawing inquiry.

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