【摘要】 基于流体动力断弧的高速电弧放电加工是一种高效蚀除工件材料的特种加工新技术,它从原理到实现都与传统电火花放电加工有着本质区别。经采样检测,高速电弧放电加工的极间放电波形特征与电火花放电加工存在明显的差异,其适用的伺服控制模型也应有所不同。为了说明高速电弧放电加工的特殊放电特性,采集分析了其间隙电压和放电电流(V-A)波形。据此建立了以间隙平均电压和放电平均电流为自变量、以进给速率为应变量的模糊伺服控制模型,有效提升了脉冲电源的放电率,使高速电弧放电加工能高效、可靠且大余量地去除难切削材料。更多还原

【Abstract】 A novel high-efficiency arc discharge machining process named blasting erosion arc machining(BEAM) based on hydrodynamic arc-breaking mechanism is implemented in order to efficiently machine the workpiece materials. It substantially differs from electrical discharge machining(EDM). Therefore,the discharging characteristics of BEAM is greatly different with EDM,resulting in adopting different servo control model. It selects the waveforms of gap voltage and discharging current(V-A) to illustrate the distinguishing discharging characteristics of BEAM. According to the characteristics,it completes a fuzzy control model which sets the discharging parameters of gap voltage and discharging current as independent variables,the motion parameter of servo feedrate as a dependent variable. The fuzzy control model can efficiently promote the discharge rate of BEAM pulse power,which finally advance BEAM to remove bulk difficult-to-cut materials.更多还原