| 摘要 |
PROBLEM TO BE SOLVED: To provide a machining power supply device for an electric discharge machine for suppressing the generation of an oscillating current and achieving stable machinability. SOLUTION: The machining power supply device for the electric discharge machine for machining a workpiece 2 by supplying machining power into an interpole between an electrode 1 and the workpiece 2 comprises a power supply 3 for generating pulse voltage, a feeder 4 constituted by a distribution constant line for supplying the output of the power supply 3 to the interpole, a series structure of a resistance 7 and switching means 8 connected in parallel to the electrode 1 and the workpiece 2 to the load side of the feeder 4 and having a characteristic impedance similar to that of the feeder 4, and control means 9 for controlling the switching means 8 to be turned on or off. The generation of the oscillating current is suppressed and the stable machinability is achieved. Even if the feeder has a different length due to a difference in type and size of the electric discharge machine, the machinability is kept unchanged. |
