A Novel Detecting and Controlling Strategy of the Discharge Status in High Speed Wire Electrical Discharge Machining

There are three discharging statuses-open, discharge and short-in high speed wire electrical discharge machining (HS-WEDM). This paper proposes a novel detecting and controlling strategy of the discharge statuses in HS-WEDM. Floating threshold of voltage which changes with the mode of gap current is proposed in this paper; three basic discharge statuses are detected and controlled by this method. Thus the fine precision and the sensitive of detection will be achieved. Normally, most of the used detecting methods are about fixed voltage threshold detecting technology, these methods can not be used on the range of the current is large and the non-rectangle discharge current waveform. In this paper, the floating threshold of voltage with the mode of gap current following is used to detect the discharge statuses, and the problem about the gap voltage waved with the gap current can be settled effectively. The random gap current wave also can be detected by this method.