Electrical discharge machining device comprises electrode part with a surface contour of any shape for being placed next to the workpiece for improving control and location of the discharge

摘要

Electrical discharge machining device comprises a tool electrode (1) with a part coated with an insulating layer of material (2) with a constant thickness less than the erosion-process gap between itself and the workpiece (3). The material is coated on all of the surface contour except the front part with respect to the workpiece and the end fixed to the electrode. The device also comprises a tool-carrier block and a power supply for producing successive electric discharges for electroerosion of the workpiece.