中文摘要：

针对微细电火花加工过程中排屑困难,极易产生短路、拉弧等非正常加工现象,进而造成微细电火花加工效率低、电极损耗大等特点,基于压电陶瓷的逆压电效应提出了一种新的加工方法——压电自适应微细电火花加工技术,对其加工原理进行了详细阐述,并结合试验对该加工系统的加工特性进行了详细分析。试验证明该技术在加工过程中能够实现放电间隙与放电状态的自适应调节,促进排屑,可有效控制短路及拉弧现象的出现,进而提高微细电火花的加工稳定性及加工效率,并能实现超低电压下的微细电火花加工。结合实例说明采用压电自适应微细电火花加工技术进行小孔加工的过程中能实现稳定加工,获得较高的加工效率,并且加工的小孔圆度较好,说明该技术在微小孔加工方面具有广阔的应用前景。

英文摘要：

In view of the difficulty in chip removal during micro electrical discharge machining process,and the resultant easy occurrence of abnormal phenomena such as short circuiting and arcing,which causes low material removal rate and high electrode wear ratio.A new piezoelectric self-adaptive electrical discharge machining system based on the inverse piezoelectric effect of piezoelectric ceramic is proposed,its machining principle is presented,and its machining characteristics are analyzed in terms of the experiments.This new technology can realize adaptive regulation of discharge gap depending on discharge conditions,facilitate chip removal,reduce the occurrence of arcing and shorting and can realize self-elimination of short circuits,thus the machining efficiency and stability of the working process can be improved greatly.Besides,this new technique can achieve micro-EDM with micro-energy at ultra low voltage.Examples explain that it can achieve stable machining process,attain high material removal rate,and the roundness of machined micro holes is good,which indicate that this new technology has wide application prospect in the field of machining micro holes.