Electrical Discharge Machining (EDM) Services
In electrical discharge machining (EDM) the desired shape is cut from the metal at the point where discharges, or sparks, occur between two electrodes. There are two types of EDM, wire and sinker.
This machine uses electrically charged wire as the tool. The wire will follow a programmed path from a STP file created by a CAD program. Wire EDMs offer unique advantages because they can carefully remove material without exerting much cutting force. A wire EDM can accommodate hard materials so there is no need for secondary or post-machining thermal treatments. The method produces low levels of residual stress. Wire EDM can create very complex shapes and hold tight tolerances, so it can be used to create very small, intricate pieces. With no direct tool contact, smooth and burr free surfaces can be achieved.
A sinker EDM forms the required shape negatively in the metal with a three-dimensional electrode. The electrode geometry will be negatively burned into the workpiece. This method can be used to create unique and complicated surface finishes. Superimposed movements in the main axes produce the most varied shapes, providing ability to create indentions and cavities that cannot be achieved using other machining techniques.
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