| 摘要 |
<p>The present invention provides a device for controlling discharge pulses for an electric discharge machining drill, the electric discharge machining drill including a work table, a drill member, X, Y and Z-axis slide rests for three-dimensionally moving the drill member along X, Y and Z axes, a rotational spindle configured such that the drill member is chucked therein, wherein DC power is applied to the drill member and the workpiece, the drill member is connected to the negative electrode of the DC power source, and the workpiece is connected to the positive electrode of the DC power source, wherein: a power control unit is connected to a power supply circuit, a plurality of switching terminals is provided in the power control unit, the plurality of switching terminals is selectively turned on/off under the control of the power control unit, so that resistance values provided in the power supply circuit are adjusted, and an intensity of current applied to the drill member and the workpiece is controlled in stepwise fashion during an on time.</p> |
