分流法小孔电火花加工数值模拟及实验  

Simulation and Experiments of Small-Hole EDM by Current Dividing

作　　者：孟庆轩[1] 王续跃[1] 梁延德[1] 徐文骥[1] 李建丽[1] 

机构地区：[1]大连理工大学机械工程学院,辽宁大连116024

出　　处：《电加工与模具》2010年第5期16-19,23,共5页Electromachining & Mould

基　　金：国家自然科学基金资助项目(50635040)

摘　　要：介绍分流法小孔电火花加工数值模拟方法,利用有限元分析软件ANSYS模拟单次脉冲放电温度场和电火花小孔加工放电状态,以等面积分流为原则,分别模拟单电极和双电极小孔电火花加工材料去除过程,分析了材料去除量随时间变化的规律。双电极模拟和试验,获得加工过程稳定且小于单电极临界加工尺寸的小孔。选用紫铜工具电极、奥氏体不锈钢工件进行验证实验,仿真结果与实验验证结果相符,为微小孔电火花加工提供了应用依据。Based on the introduction of small-hole EI）M by current dividing, finite element analysis software ANSYS was used to simulate temperature field and electrical discharge state of single-pulse. Material removals in small-hole EDM using single electrode and double electrodes were simulated with the principle of current dividing on discharging-area equalization. The variation of material removal with time was studied too. Small-holes less than critical size were obtained by simulation and experiments. Copper electrode and austenitic stainless steel were used in experiments. The results show that there is a consistency in experiments and simulation. The research provides practical reference for application of small-hole EDM.

关 键 词：电火花加工 小孔 分流法 数值模拟 

分 类 号：TG661[金属学及工艺—金属切削加工及机床]