上海交通大学学报

上海交通大学学报（自然版） ›› 2012, Vol. 46 ›› Issue (07): 1015-1020.

• 金属学与金属工艺 • 上一篇    下一篇

电火花线切割极间介电特性与放电能量分配关系  

刘志东,魏为,陆霖琰,徐安阳   

  1. （ 南京航空航天大学 机电学院， 江苏 南京 210016）
  • 收稿日期:2011-07-29 出版日期:2012-07-30 发布日期:2012-07-30
  • 基金资助:

    国家自然科学基金研究项目(50975142)，江苏省自然科学基金(BK2008393)

Research of Relationship Between Interelectrode Dielectric Properties and Energy Distribution in Wire Electrical Discharge Machining

 LIU  Zhi-Dong, WEI  Wei, LU  Lin-Yan, XU  An-Yang   

  1. (College of Mechanical and Electrical Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China)
  • Received:2011-07-29 Online:2012-07-30 Published:2012-07-30

摘要： 摘要： 
建立了电火花线切割极间介质电阻模型，分析了加工能量与极间介质电导率、工件厚度之间的关系，并对极间介质电阻模型进行了实验验证.研究结果表明,随着电导率的升高或者工件厚度的增加，放电期间极间“漏电流”增大，损耗在极间介质的能量增加，加工效率降低，电导率变化导致的极间电阻改变对于加工效率的影响显著. 关键词： 
电火花线切割； 工作介质； 介电特性； 电导率； 放电能量中图分类号：  TG 662
文献标志码：  A    

Abstract: A resistance model of interelectrode dielectric fluid in wire electrical discharge machining(WEDM) was established. And the relationship among machining energy, electrical conductivity and thickness of a workpiece was analyzed. The resistance model of interelectrode dielectric fluid was verified by experiments. The results show that with the higher electrical conductivity or the thickness of workpiece, the larger the interelectrode leakage current is during discharge, the more the energy loss in the interelectrode dielectric fluid, the lower the machining efficiency. Cutting efficiency is obviously influenced by the change of the resistance which is due to the change of electrical conductivity.

Key words: wire electrical discharge machining(WEDM), dielectric fluid, dielectric properties, electrical conductivity, discharging energy