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RC电火花加工电源,随电阻R变小,加工生产率增高。但是,R值变小会使间隙放电困难,容易产生持续放电以至不能进行加工。如使电极作超声振动,即使R值较小,可得到高效率加工。图1是使电极作趣声振动的电火花(放电)加工电路原理图。在图中,超声波发生器输出功率150瓦,频率为24千赫,电极端部振幅12微米,电极材料是黄铜,直径为3毫米;工作液采用水,直流电源电压为100伏,电容C最大值为290微法:工件是高速钢。图2表示在上述条件下,电阻R(Ω)与加工生产率的
RC EDM power supply, with the resistance R smaller, higher processing productivity. However, a smaller value of R makes discharge of the gap difficult and continuous discharge is liable to occur, so that processing can not be performed. If the electrode for ultrasonic vibration, even if the R value is small, can be highly efficient processing. Figure 1 is a schematic illustration of a sparking (discharge) machining circuit for vibrating the electrodes. In the figure, the ultrasonic generator output power of 150 watts, a frequency of 24 kHz, the electrode tip amplitude 12 microns, the electrode material is brass, a diameter of 3 mm; working fluid using water, the DC power supply voltage of 100 V, the capacitor C The maximum value of 290 microfarads: the workpiece is high-speed steel. Figure 2 shows the resistance R (Ω) versus process productivity under the above conditions