中国机械工程2012，Vol.23Issue(14)：1712-1717,6.
超声振动辅助电火花铣削间隙流场分析与验证
Theoretical Analysis and Verification for Flow Field of Ultrasonic Vibration Aided Electro--discharge Milling
摘要
Abstract
To study the effects of ultrasonic vibration on flow field in the interelectrode gap ol electrodischarge milling, a theoretical model was built based on fluid dynamics theory where the dynamics equation in the flow field was established and the pressure equations along x and y directions were derived as well by simplifying the flow field to a two-dimensional (2D) one. These models were veri fled by an axisymmetric rotate 2D simulation model developed by the finite element analysis software FLUENT. The effects of alternative pressure in the flow field were analyzed and the verification ex- periments were carried out. Results show that the pressure of liquid along x and y directions in the flow field changes periodically at ultrasonic frequency because of the effects of ultrasonic vibration, which makes cavitation effect enhanced. Meanwhile the liquid flow behavior is improved substantially, the probability of short circuit and arc discharge is reduced, the machining stability and efficiency are improved,and thus the material removal rate of workpiece is enhanced. At the same time electric ero- sion pit depth is reduced,which in turn makes the molten metal on workpiece spread out more evenly, and finally the surface roughness of workpiece is decreased correspondingly.关键词
电火花铣削/超声振动/间隙流场/空穴作用Key words
electro- discharge milling/ultrasonic Vibration/gap flow field/cavitation effect分类
矿业与冶金引用本文复制引用
朱涛,张建华,常伟杰,王涛,宋夕超..超声振动辅助电火花铣削间隙流场分析与验证[J].中国机械工程,2012,23(14):1712-1717,6.基金项目
国家高技术研究发展计划（863计划）资助项目 （）
国家自然科学基金资助项目 （）
