摘要
在工具电极上附加超声振动,可以通过超声振动的泵吸作用、空化作用改善极间流场,减少加工碎屑的集聚,从而提高电火花铣削加工的加工效率.基于Fluent平台,对超声振动辅助电火花铣削一个超声振动周期内的加工极间压力分布变化、流速变化与蚀除颗粒浓度分布进行了仿真研究;分析超声振动对极间压力分布、流速以及蚀除颗粒浓度分布的影响.仿真结果表明,超声振动使极间电介质工作液的压力分布更富梯度变化、流速变化加强,使加工碎屑在极间分布更加均匀,有利于加工碎屑从极间排除,减少电弧放电与短路,提高加工效率.
By attaching ultrasonic vibration to the electrode tool,the flow field will be improved and the debris concentration will be reduced by the pump suction effect and cavitation effect,thus the processing efficiency will be improved. The variation of pressure field,velocity field and particle distribution field in an ultrasonic vibration period is simulated by the element analysis software Fluent. The influence of ultrasonic vibration on pressure field,velocity field and particle distribution field is analyzed. The simulation results shows that the gradient of pressure distribution and the change of flow velocity are enhanced by the effect of ultrasonic vibration,which is beneficial to the excluding of machining debris,the reducing of arc discharge and short circuit,and the increasing of processing efficiency.
出处
《应用基础与工程科学学报》
EI
CSCD
北大核心
2015年第S1期151-157,共7页
Journal of Basic Science and Engineering
基金
国家科技重大专项(2012ZX04010032)
中央高校基本科研业务费(2013HGCH0004
2013HGBH0060)
合肥工业大学博士学位人员专项资助基金(JZ2014HGBZ0007)
关键词
电火花铣削
超声振动
流场
颗粒场
仿真
electrical-discharge milling
ultrasonic vibration
flow field
particle field
simulation
