电火花诱导可控烧蚀铣削深度对电极损耗影响的仿真研究  

Simulation Research on the Milling Depth Influencing Electrode Wear of Controllable Spark-inducing Combustion-milling

作　　者：刘志东[1] 李文沛[1] 王继强[1] 

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5期14-17,共4页Electromachining & Mould

基　　金：国家自然科学基金资助项目(51175256;51205197);江苏省自然科学基金资助项目(BK2011732);航空基金资助项目(2011ZE52060);江苏省普通高校研究生科研创新计划资助项目(CXLX12_0138);中央高校基本科研业务费专项资金资助

摘　　要：电火花诱导可控烧蚀铣削加工具有加工效率高、相对电极损耗低等优点。采用Fluent软件对不同铣削深度条件下,氧气流场在放电间隙中的分布状况及其对相对电极损耗率的影响进行了模拟仿真。结果表明:在放电间隙由水平转向竖直方向后,氧气流会在靠近工件的区域形成高速流动区,而在靠近电极的区域形成低速流动区,从而使相对电极损耗率降低,且该现象会随着铣削深度的增加呈先增强、后减弱的规律。该结果为实际加工中选择铣削深度提供了理论依据,并通过实验验证了该模拟结果的正确性。Controllable spark-inducing combustion-milling has advantages of high material removal rate and low relative electrode wear rate. Using the Fluent software,the distribution status of the oxygen flow field is simulated in the discharge gap under different milling depth,and the effect of the distribution on the relative electrode wear rate is analyzed. The result shows that the oxygen flow will form a high-speed flow area near the work-piece whereas form a low-speed flow area near the electrode when the discharging gap turns upward,which could induce the decrease of the relative electrode wear rate,and this phenomenon will appear a parabola form trend with the increase of milling depth. The result provides a theoretical basis for the choice of the milling depth better in the actual work,and the correctness of the simulation result is verified by experiment.

关 键 词：电火花铣削加工 放电诱导 可控烧蚀 流场仿真 电极损耗 

分 类 号：TG661[金属学及工艺—金属切削加工及机床]