近年来,由于晶体管、可控硅电源的出现,适应控制技术的初步应用。当以石墨或紫铜为工具电极加工型腔模时,粗、中加工时,工具电极损耗,一般可控制在1％以内,钢一钢穿孔加工或分型面加工,损耗在10～20％以内。这时加工效率还是较高的。但在精加工时,由于脉宽变窄,电极损耗明显加大,生产效率也下降了。 In recent years, due to the emergence of transistors, SCR power supply, to adapt to the initial application of control technology. When using graphite or copper as a tool electrode processing cavity mold, the rough, the processing, the tool electrode loss, generally can be controlled within 1%, a steel perforation processing or parting surface processing, loss of 10 to 20% or less . At this time the processing efficiency is still high. However, in finishing, due to the narrow pulse width, the electrode loss increased significantly, the production efficiency also declined.