METHOD AND DEVICE FOR ELECTRIC DISCHARGE MACHINING

摘要

PROBLEM TO BE SOLVED: To carry out removal machining and surface treatment machining without performing the replacing operation of a power supply and the change operation of an electrode. SOLUTION: This device is provided with a removal machining electrode unit U1-1 provided with a removal machining electrode 5 for performing removal machining to a workpiece, and a removal machining electrode Z-axis driving device 6 for displacing the removal machining electrode 5; a surface treatment machining electrode unit U2-1 provided with a surface treatment machining electrode 7 for performing surface treatment machining to the workpiece 3, and a surface treatment machining electrode Z-axis driving device 8 for displacing the surface treatment machining electrode 7; and an electrode changing means 9 for changing the removal machining electrode unit U1-1 and the surface treatment machining electrode unit U2-1 with each other.