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EDM or Electrical Discharge Machining is also known as spark eroding, spark machining, or die sinking. It is a process that uses electrical discharges to erode the material from the surface of a workpiece. EDM is used for creating extremely intricate and complex shapes cost-effectively. However, it is only used with metals/conductor materials.
The process begins with an electrode that is placed above the workpiece at a certain distance, typically about an inch. A wire from the electrode is fed into a guide tube. This wire is then connected to a high-frequency generator that sends an electrical charge through it. Once done, the EDM machine sends a pulse of electricity through the wire and produces intense heat as a result.
This intense heat is used for the high-precision cutting of materials. It is used to process block materials such as gears and molds.
EDM process uses an electrically charged wire to remove material from the surface of a metal piece. Here is a step-by-step guide on how to use EDM:
Place the workpiece on the workbench. Attach it securely (typically with a vise). Set up the machine for wire EDM. Place the electrode above the workpiece.
When the distance between the wire electrode and the workpiece is approximately ten microns, the insulation between the two is damaged, and sparking occurs. As a result, there is an instantaneous flow of current, creating an arc tower (high-density discharge state).
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