往复走丝线切割复合工作液寿命表征的研究  

Research on the Characteristic of Compound Dielectric Fluid's Life in Reciprocating Travelling Wire Electrical-discharge Machining

作　　者：李明明[1] 刘志东[1] 李凌铃 岳伟栋 

机构地区：[1]南京航空航天大学机电学院,江苏南京210016

出　　处：《电加工与模具》2014年第2期14-17,24,共5页Electromachining & Mould

基　　金：国家自然科学基金资助项目(51175256)

摘　　要：研究了往复走丝电火花线切割加工过程中切割效率、工件表面形貌、蚀除效率、电导率、工作液折光率及pH值的变化规律,并检测了放电加工波形。分析认为:以往采用切割效率来衡量工作液使用性能的方法缺乏科学性,而采用蚀除效率作为复合工作液寿命的表征指标更加科学,且蚀除效率的变化与加工时的放电脉冲利用率有很大关联性,为建立往复走丝线切割复合工作液寿命的评价体系指明了方向。The ever changing principles regarding cutting efficiency,workpiece surface microstructure,ablation efficiency,electrical conductivity,the pH value and concentration of the dielectric liquid in the process of HSWEDM are studied,and the machining waveform of electro-discharge in the process is tested. The analysis shows that the method previously determining the functional performance of dielectric fluid is short of scientificity,hence using ablation efficiency as the life index of a compound dielectric fluid is more accurately represented,and the change of ablation efficiency has great relevance with electrical impulses utilization rate in this process. This perception points out the direction for establishing the evaluation system regarding the life expectancy of HSWEDM dielectric fluid.

关 键 词：电火花线切割加工 工作液 寿命表征 蚀除效率 脉冲利用率 

分 类 号：TG661[金属学及工艺—金属切削加工及机床]