期刊文献+

多孔质电极电火花加工极间流场仿真 被引量:2

Simulation of Flow Field between Electrodes in Porous-electrode of Electrical Discharge Machining
下载PDF
导出
摘要 为研究多孔质电极电火花加工中分布式冲液对加工过程的作用机制,建立了多孔质电极极间流场模型,采用固液两相流数值方法模拟电极间冲液和蚀除产物的两相流动过程,与单孔电极进行了对比研究,并进行了电火花加工实验验证。仿真结果显示:多孔质电极的极间流场流速由于分布式冲液出口的存在而呈现分布式特征,且流场外围流速大于中心流速;采用多孔质电极后,由于分布式冲液出口的存在,能够将固相蚀除产物沿一定的通道有效排出加工区域。与仿真结果相对应,电火花加工实验结果表明:由于冲液对蚀除产物良好的排出作用,多孔质电极能够获得更高的加工效率,且加工速度随加工深度变化不大;但由于冲液影响了炭黑向工具电极的附着行为,导致工具电极相对损耗率增大。 In order to investigate the mechanism of distributed flushing fluid in porous-electrode Electrical Discharge Machining( EDM),modeling of the gap flow field was carried out. The numercial method of solid-liquid two-phase flow was used to simulate the process of two-phase flow of flushing fluid in porous-electrode and solid debris,which was compared and investigated with that of single electrode to verify the EDM experimentally. The velocity of the flow between electrodes had a distributed feature because of the distributed outlet,and the periphery velocity was larger than that around center. After using porous-electrode,the solid debris was capable of evacuated the working area effectively along certain channels which resulting from the distributed flushing outlet. As compared with corresponding simulation results,the EDM experimental results show that the porous electrode is able to achieve a higher machining efficiency as a result of the evacuation effect of flushing fluid on debris,and the machining depth is affected by the machining speed weakly. On the other hand,as a result of the flushing influence on carbon adhesion to tool electrode,the tool wear rate is raised relaiely.
出处 《机床与液压》 北大核心 2016年第1期147-151,111,共6页 Machine Tool & Hydraulics
基金 国家自然科学基金资助项目(51205169)
关键词 电火花加工 多孔质电极 流场仿真 固液两相流 Electrical discharge machining Porous-electrode Flow field simulation Solid-liquid two-phase flow
  • 相关文献

参考文献3

二级参考文献19

  • 1余兴泉,何德玶,陈锋.泡沫金属对流换热性能研究[J].功能材料,1993,24(5):438-442. 被引量:8
  • 2周照耀,吴峥强,邵明,李元元.烧结金属多孔材料孔隙的研究[J].粉末冶金工业,2005,15(4):6-10. 被引量:12
  • 3于淼,姜培学.高温气体流过圆管时壁面发散冷却的数值模拟[J].清华大学学报(自然科学版),2006,46(2):242-246. 被引量:2
  • 4凌建明,林小平,赵鸿铎.圆柱形桥墩附近三维流场及河床局部冲刷分析[J].同济大学学报(自然科学版),2007,35(5):582-586. 被引量:37
  • 5Ho K H,Newman S T. State of the artelectrical discharge machining (EDM) [J]. International Journal of Machine Tools & Manufacture, 2003.43 (13) : 1287- 1300.
  • 6Kunieda M. Challenges in EDM technology [J]. International Journal of the Japan Society for Precision Engineering, 1999,33(4) : 276-282.
  • 7Balleys F, Sebellin P. EDM Milling: A new process in electrical discharge machining [J]. Journal of JSEM(in Japanese), 1998,32(69) :75-80.
  • 8Brockhoff R W. Multiple lead-electrical discharge machining[R]. Final Report, 1985:1-32.
  • 9Kunieda M, Muto H. Development of multi-spark EDM [J]. Annals of the CIRP,2000,49(1) :119-122.
  • 10Han F, Kunieda M. Development of parallel spark electrical .discharge machining [J]. Precision Engineering, 2004,28 (1) : 65-72.

共引文献12

同被引文献8

引证文献2

相关作者

内容加载中请稍等...

相关机构

内容加载中请稍等...

相关主题

内容加载中请稍等...

浏览历史

内容加载中请稍等...
;
使用帮助 返回顶部