基于PZT激励同步压缩放电通道的微细电火花加工技术  

Discharge Channel Compressed Micro-EDM Techniques Based on PZT Excitation

作　　者：杜连明[1,2,3] 张勤河[1,3] 张建华[1,3] 张亚[1,3] 

机构地区：[1]山东大学机械工程学院,济南250061 [2]济南大学机械工程学院,济南250022 [3]山东大学高效洁净机械制造教育部重点试验室,济南250061

出　　处：《机械工程学报》2013年第9期184-189,共6页Journal of Mechanical Engineering

基　　金：国家自然科学基金资助项目(50775128;51075239)

摘　　要：针对微细电火花加工效率低,排屑困难,放电状态不稳定的问题,基于压电陶瓷(Piezoelectric ceramic,PZT)的逆压电效应,采用火花放电与PZT激励同步脉冲电源,提出PZT激励同步压缩放电通道的微细电火花加工的新方法。对其系统构成和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机理进行了分析,试验研究证明采用PZT同步压缩放电通道过程中能够改善放电间隙的状态,提高加工效率和加工质量,促进排屑,进而提高了微细电火花的加工稳定性。利用自行开发的加工系统成功加工出直径67μm的微细孔,加工过程稳定,表明该技术在微细加工方面具有广阔的应用前景。In micro-EDM, the debris generated in machining process is difficult to be moved from the discharging gap, the discharge state is instability, and the material removal rate is low. A new method of piezoelectric ceramic （PZT） incentive synchronous compression discharge channel micro-EDM is presented based on the inverse piezoelectric effect of PZT piezoelectric ceramics, using a spark discharge and PZT sync pulse power. The system composition and machining principles are described, and its machining mechanism is analyzed in terms of the experiments. By the experiments, it is certificated that on the process of PZT sync compressing discharge channel machining, the state of discharge gap, the machining efficiency and quality can be improved, the throw out of debris makes easier, and then the stability of micro-EDM process is raised. A micro-hold is produced diameter in 67μm with stable machining process by using a self-developed machining system, which indicates that this new technology has wide application prospect in the field of micro manufacturing.

关 键 词：压电陶瓷 微细电火花 同步压缩放电通道 

分 类 号：TG661[金属学及工艺—金属切削加工及机床]