上海交通大学学报

上海交通大学学报（自然版）

• 金属学与金属工艺 • 上一篇    下一篇

基于极间流场模型分析的高速走丝电火花线切割技术

刘志东，王振兴
  

  1. （南京航空航天大学 机电工程学院， 南京 210016）
  • 收稿日期:1900-01-01 修回日期:1900-01-01 出版日期:2011-01-27 发布日期:2011-01-27

Research on High Speed WireCut Electrical Discharge Machine Based on Analysis of Interelectrode Flow

LIU Zhidong,WANG Zhenxing
  

  1. (College of Mechanical and Electrical Engineering, Nanjing University of
    Aeronautics and Astronautics, Nanjing 210016, China)
  • Received:1900-01-01 Revised:1900-01-01 Online:2011-01-27 Published:2011-01-27

摘要： 提出一种简化的电火花线切割极间流场模型，分析了平板长度及其运动速度和缝隙宽度对压差流和剪切流的影响，以及复合后的间隙流场，通过对高速走丝电火花线切割机附加共轴式高压喷嘴，在高能量切割条件下，实验对比了以剪切流为主的单一浇注极间供液方式与以复合流动为主并辅以高压喷液的复合极间供液方式的切割效率和表面质量.结果表明：压差流与剪切流的复合，有利于改善高能量切割的极间流场状况；复合供液方式可明显改善单一浇注极间供液方式的状况，最高切割效率约为220 mm2/min，增幅达20%，且其表面基本没有烧伤，从而验证了压差流与剪切流的复合效果.

关键词: 电火花线切割, 流场, 极间状态, 切割效率, 表面质量

Abstract: A simplified interelectrode flow model of wirecut electrical discharge machine was proposed. The effect of the plate length, velocity and gap width respectively on pressuredifference flow and shear flow was investigated. The compound gap flow formed by combining the pressuredifference flow and shear flow was analyzed. By adding coaxial nozzle and adopting high energy, a test was done to compare the cutting efficiency and surface quality of the single casting fluid supply dominated by shear flow with that of the combination fluid supply supplemented by highpressure spray liquid. The results show that compared with the single casting fluid supply, the gap condition of the combination fluid supply is improved obviously: the maximum cutting efficiency nearly reaches 220 mm2/min, increases by 20% and little surface burns are got, which verifies the effect of the composition of pressuredifference flow and shear flow.

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