摘要
应用电磁场理论对微细电火花加工(Micro Electrical Discharge Machining,Micro-EDM)损耗机理进行分析,建立了加工中工具电极电场分布的数学模型。应用Comsol Multiphysics软件对此模型进行了计算与模拟,分析了电场强度的变化对电极形状变化的影响,并指出在靠近放电点位置和底部电极形状改变后,集肤效应的作用被削弱。实验验证了仿真结果和所提出损耗机理的正确性,为电极损耗补偿策略和加工精度的提高提供了理论依据。
The mechanism of micro Electrical Discharge Machining （micro-EDM） electrode wear was discussed based on electro- magnetic theory,and a mathematical model of electrode wear is established. This model is solved by Comsol Multiphysics. The shape of electrode is changing with electrode field in micro-EDM. Skin effect effects current density, but it is not serious in the proximity of discharge point. These results were verified by experiment. They provide theoretical basis for improving the precision.
出处
《现代制造工程》
CSCD
北大核心
2013年第2期9-13,24,共6页
Modern Manufacturing Engineering
基金
国家自然科学基金项目(51005027)
