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POWER SUPPLY DEVICE FOR WIRE ELECTRIC DISCHARGE MACHINING

  • US 20150246403A1
  • Filed: 09/18/2013
  • Published: 09/03/2015
  • Est. Priority Date: 09/18/2012
  • Status: Active Grant
First Claim
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1. A power supply device for wire electric discharge machining, comprising:

  • a first DC power supply;

    a first switching element disposed between the first DC power supply and a machining gap;

    a second DC power supply;

    a second switching element disposed between the second DC power supply and the machining gap;

    an electric discharge generation detector generating a detection signal indicating that an electric discharge is generated in the machining gag; and

    a pulse generator controlling the first switching element and the second switching element,wherein the pulse generator switches on the second switching element and applies a voltage of the second DC power supply to the machining gap in order to generate the electric discharge in the machining gap, intermittently switches on the first switching element at a predetermined frequency in response to the detection signal and supplies a series of current pulses to the machining gap, and discontinues supply of the series of current pulses when the current pulses do not reach a reference current.

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