Thermal Processes in Electrical Discharge Machining by a Coated Polymer Tool Electrode

Mathematical models are obtained for the temperature fields at the surface of a coated polymer tool electrode and a workpiece electrode in electrical discharge machining (EDM). In electrical discharge machining with a coated polymer tool electrode, the temperature distribution at the surface of the tool is nonuniform. That may disrupt the applied coating. Models of the temperature distribution within the workpiece at the instant of a single pulse are derived. Structural changes at the machined surface of the workpiece may be predicted.