Influence of alternating side gap on micro-hole machining performances in micro-EDM
Influence of alternating side gap on micro-hole machining performances in micro-EDM
复制标题
交替侧隙对微细电火花微孔加工性能的影响
DOI：
10.1007/s00170-017-0959-9
复制
发表时间：
2018
影响因子：
3.4
通讯作者：
Jicheng Bai
中科院分区：
文献类型：
--
作者：
Zhengkai Li;Jicheng Bai
微细电火花加工微小孔时，由于微小孔的侧隙窄而均匀，导致工作区放电碎屑难以清除，从而导致短路等异常放电现象频繁发生。本文建立了一个具有交替侧隙的三维模型，并在此基础上分析了工作间隙内的流场和排屑运动。模拟结果表明，侧间隙的交替改变了底间隙的流场结构，随着偏心半径的增大，底间隙和侧间隙的流速均增大。另外，当采用交替侧间隙时，由于改善了工作间隙内的流场，底间隙内的磨屑颗粒浓度显著降低，逃逸磨屑颗粒的比例增加。实验结果表明，随着偏心半径的增大，材料去除率和微孔深宽比均有所提高。但偏心半径仍需考虑电极的磨损情况合理确定。
In the machining of micro-hole by micro-EDM, the narrow and uniform side gap leads to the difficulty in removing discharge debris from the working area, which causes frequent occurrence of abnormal discharges such as short circuit. In this study, a three-dimensional model with alternating side gap was proposed, based on which the flow field and movement of discharge debris in working gap were analyzed. Simulation results showed that the alternating side gap changed the flow field pattern in bottom gap, and the flow velocities both in bottom gap and side gap were increased as the enlargement of eccentric radius. In addition, when the alternating side gap was adopted, the concentration of debris particles in the bottom gap was dramatically decreased due to the improvement of flow field in the working gap, and the percentage of escaped debris particles was increased. Verifying experiments were carried out and the influences of alternating side gap on the micro-hole machining performances were addressed, which showed that both the material removal rate and aspect ratio of micro-hole were improved as the eccentric radius increases. Nevertheless, the eccentric radius still needs to be determined reasonably in consideration of the wear of electrode.
登录
查看更多内容
DOI：
10.1016/j.precisioneng.2014.04.010
发表时间：
2014-10-01
影响因子：
3.6
作者：
Plaza, Soraya;Sanchez, Jose A.;Pombo, Inigo
通讯作者：
Pombo, Inigo
微电火花超声振动和电极行星运动辅助高深宽比微孔钻削
影响因子：
4.1
作者：
Yu, Z. Y.;Zhang, Y.;Guo, D.
通讯作者：
Guo, D.
DOI：
10.1016/s0007-8506(07)63451-9
发表时间：
2000
期刊：
CIRP Annals
影响因子：
--
作者：
T. Masuzawa
通讯作者：
T. Masuzawa
影响因子：
4.1
作者：
Okada, A.;Uno, Y.;Habib, S.
通讯作者：
Habib, S.
DOI：
10.1016/j.procir.2013.03.034
发表时间：
2013
期刊：
Procedia CIRP
影响因子：
--
作者：
Xiuzhuo Fu;Youzhong Zhang;Qi Zhang;Jiandong Zhang
通讯作者：
Xiuzhuo Fu;Youzhong Zhang;Qi Zhang;Jiandong Zhang