采用粒子模拟与蒙特卡罗相结合的方法研究了非导电工程陶瓷电火花加工放电通道的形成机理,建立了其放电电离过程的模型,仿真了放电通道的微观形成过程,得到了放电通道中粒子(主要包括电子和离子)的空间分布。仿真结果显示:在放电通道的形成过程中,主要是电子在高速运动,离子的运动对放电通道的形成贡献并不明显。 The formation mechanism of discharge channel in non-conductive engineering ceramic by EDM was studied by using the combination of particle simulation and Monte Carlo. The model of discharge ionization process was established and the micro-formation process of discharge channel was simulated. (Mainly including electrons and ions) of the spatial distribution. The simulation results show that during the formation of the discharge channel, the electrons mainly move at high speed and the contribution of the ion movement to the formation of the discharge channel is not obvious.