POWER SUPPLY DEVICE FOR ELECTRICAL DISCHARGE MACHINE

摘要

The present invention includes a series circuit that includes a DC power supply and a switching element for supplying a DC or AC current pulse to a machining gap between a machining electrode and a workpiece; and a control unit that controls the switching element, wherein when generating a current pulse having a triangular shape by an inductance present on the series circuit, the control unit controls on-time and off-time of the switching element such that a peak value of an arbitrary current pulse in a pulse train including a plurality of current pulses changes.

主权项

1. A power supply device for an electric discharge machine comprising:
a series circuit that includes a DC power supply and a switching element for supplying a DC or AC current pulse to a machining gap between a machining electrode and a workpiece; and a control unit that controls the switching element, wherein when generating a current pulse having a triangular shape by an inductance component present on the series circuit, the control unit controls on-time and off-time of the switching element such that a peak value of each current pulse in a pulse train including a plurality of current pulses gradually increases toward a maximum value of a peak value or gradually decreases from the maximum value of a peak value.