CNC sinker EDM machines use a charged electrode to burn away metals instead of using a traditional cutting tool. The electrodes are typically made of graphite, but copper and specific beryllium copper alloys are usable as well.  The electrode is cut with a traditional CNC mill, or wire EDM machine, into the pattern that will be transferred into the workpeice by way of a spark created between the electrode and the workpiece, vaporizing the metal it comes in contact with.  Oil is then used to flush the eroded particles away from the spark gap. Common applications of a sinker EDM machine are machine molds and dies, as well as in finishing applications.

CNC Sinker EDM Manufacturers:

Sodick
● Mitsubishi
● Agie Charmilles
● Makino
● Ona

CNC sinker EDM machines use an electrically charged electrode to burn away away metal regardless of its hardness. The electrodes are typically made from graphite but copper and beryllium copper electrodes are also used. Heat from the spark vaporizes and melts away the conductive workpiece. The electrode never touches the workpiece so there is no physical cutting tool force exerted on the workpiece. Oil is used to flush the eroded particles away from the spark gap. CNC sinker EDMs are commonly used to machine molds and dies. They are often considered a last machining option.

CNC Sinker EDM Manufacturers:

Sodick
● Mitsubishi
● Agie Charmilles
● Makino
● Ona

cnc-sinker-edm

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