高频群脉冲电化学加工中压力波对加工质量的影响

Influence of Pressure Wave on the Machining Quality in High Frequency Group Pulse Electrochemical Machining Process

阐述了高频群脉冲电化学加工中的压力波现象,并解释了频率通过压力波的作用向周围剧烈传播,对极间液流形成了很强的搅拌作用,从而改善电化学加工工艺的机理。在此基础上对压力波进行了数学描述,并进行了数值模拟,对高频群脉冲电化学加工的超薄结构件加工工艺试验进行验证。结果表明,在高频群脉冲电源作用下,选择较高的主脉冲频率,可获得良好的加工质量。

The phenomenon of pressure wave in the high frequency group pulse electrochemical machining （HGPECM） was clarified. The influence of frequency was explained. The strongly agitation to the inter-electrode gap flow was formed during the pressure wave strenuous spreading around, so that the machining quality of the electrochemical machining was improved. A mathematical model of pressure wave was described and simulated. The processing experiment of facet and ultrathin structure part electrochemical machining was carried out to prove it. It is indicated from the results that effected by the high frequency group pulse power, higher machining quality is obtained by choosing higher main pulse frequency.