旋转斜槽电极电火花微小孔加工电蚀产物排除过程仿真研究  

Simulation Study on Debris Removal in EDM Micro-hole Maching with Rotating Chute Electrode

作　　者：刘宇[1] 刘创业 马付建[1] 杨大鹏 张生芳[1] LIU Yu;LIU Chuangye;MA Fujian;YANG Dapeng;ZHANG Shengfang(School of Mechanical Engineering,Dalian Jiaotong University,Dalian 116028,China)

机构地区：[1]大连交通大学机械工程学院,辽宁大连116028

出　　处：《电加工与模具》2020年第5期19-26,共8页Electromachining & Mould

基　　金：国家自然科学基金面上项目(51875074);辽宁省自然科学基金指导计划项目(20180550425);辽宁省教育厅科研平台项目(JDL2016006)。

摘　　要：在电火花加工微小孔时,随着孔深增大,电蚀产物很难从加工间隙排出。通过在电火花微小孔加工工具电极上加工两个对称斜槽,对其进行改进;通过电极旋转,改变间隙流场的流动状态,以达到促进电蚀产物排除、增大加工深径比的目的;对间隙流场进行动力学分析,利用Fluent软件进行模拟仿真,分析其速度场和压力场,并通过二次开发功能模拟电蚀产物的随机产生,直观地表明斜槽对电蚀产物排除的促进作用。When machining micro-holes based on EDM,it is difficult to eliminate the debris from the processing gap with the hole depth increase.By modifying the tool electrode,two symmetric chutes are machined on the tool electrode,and the gap flow field is changed by the electrode rotation,achieve the purpose of promoting the elimination of the debris and increasing the aspect ratio of processing.Dynamic analysis of the gap flow field,by the fluent software,the velocity field and pressure field are analyzed.Through the secondary development function,the random generation of the debris is simulated,which visually shows the promotion effect of the chute on the elimination of the debris.

关 键 词：电火花加工 微小孔加工 斜槽电极 流场仿真 

分 类 号：TG661[金属学及工艺—金属切削加工及机床]