电火花加工是在液体介质中工具电极与工件间极小的间隙中进行的。直接观测和判别电火花加工的放电状态非常困难。加工过程中,放电间隙经常变化,其状态瞬息万变,各种放电加工状态(如空载,火花,电弧,短路,搭桥等)总是交错出现的。由于伺服进给速度的不同和脉冲参数选择的变化,使这几种状态在整个加工过程中所占的比例不同。而保持加工的稳定性,提高正常放电状态的比例,对提高加工工艺指 EDM is carried out in a very small gap between the tool electrode and the workpiece in a liquid medium. It is very difficult to directly observe and judge the discharge status of EDM. During processing, the discharge gap often changes, its state is rapidly changing, a variety of discharge machining conditions (such as no-load, spark, arc, short circuit, bypass, etc.) are always staggered. Due to the different servo feed speed and the choice of pulse parameters, the proportions of these states in the whole process are different. While maintaining the stability of processing, improve the proportion of normal discharge state, to improve the processing technology refers