Electrical discharge machining (EDM) shapes metal by creating sparks that melt tiny portions of the workpiece, and is an exceptionally diverse process that generates no cutting forces. EDM is especially useful in the production of fragile parts that cannot take the stress of conventional machining.
Part of the Fundamental Manufacturing Processes Video Series, this program examines the EDM process and the two primary forms of electrical discharge machining — ram EDM and wire EDM.
The ram EDM process segment details the components of an EDM system, the EDM erosion process, and cycle time. The ram EDM, or sinker EDM, segment outlines the process and presents the various process subsystems, including the power supply, dielectric fluid system, the electrode and its manufacture, and the servo system.
The wire EDM segment features the various wire EDM process subsystems, including the power supply, dielectric fluid system, the wire feeding system, and the wire positioning system. EDM holemaking is also explored.
By Philip D Rufe, CMfgE
By Ahmad K Elshennawy, Gamal S Weheba, PhD