Impulse discharge method to investigate the influence of gap width on discharge characteristics in micro-EDM
Impulse discharge method to investigate the influence of gap width on discharge characteristics in micro-EDM
复制标题
脉冲放电法研究间隙宽度对微细放电加工放电特性的影响
DOI：
10.1007/s00170-016-9508-1
复制
发表时间：
2017-05
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
在微细放电加工（micro-EDM）中，整个放电过程发生在电极和工件之间的狭窄间隙中。本研究基于脉冲放电法，研究了间隙宽度对放电特性的影响。首先确定临界击穿距离，对不同间隙宽度下的放电状态进行分类分析。从等离子体通道内带电粒子和火花维持条件的角度，解释了微细电火花加工中存在两种不同间隙电压的火花波形的原因。点火延迟和放电持续时间比作为影响材料去除率的两个重要因素，也在不同间隙宽度下进行了研究。结果表明，在研究条件下，综合考虑点火延迟和放电持续时间比，间隙宽度为临界击穿距离的40%，表现出令人满意的性能。利用原子力显微镜(AFM)对不同间隙宽度下获得的放电坑形貌进行了测量和分析，结果表明，即使在放电能量相同的情况下，随着间隙宽度的增加，放电坑的直径和深度均减小。
In micro electrical discharge machining (micro-EDM), the whole discharge process happens in the narrow gap between electrode and workpiece. In this study, the influence of gap width on discharge characteristics was investigated based on the impulse discharge method. With determining the critical breakdown distance firstly, the discharge status under various gap width was classified and analyzed. From the perspective of charged particles in plasma channel and the spark maintenance condition, the reason why two types of spark waveform with different gap voltage exist in micro-EDM was explained. Ignition delay and discharge duration ratio, as two import factors influencing the material removal rate, were also investigated under different gap width. The results indicated that the gap width which is 40 % of critical breakdown distance shows a satisfying performance by the combined consideration of ignition delay and discharge duration ratio under the studied conditions. The morphologies of discharge craters obtained under different gap width were measured and analyzed by atomic force microscope (AFM), which showed that both the diameter and depth of discharge crater are decrescent with the increase of gap width, even under the condition of identical discharge energy.
登录
查看更多内容
DOI：
10.1007/s00170-014-5894-4
发表时间：
2014-07-01
影响因子：
3.4
作者：
Rao, R. Venkata;Kalyankar, V. D.
通讯作者：
Kalyankar, V. D.
DOI：
10.2526/jseme.41.156
发表时间：
2007
期刊：
Journal of the Japan Society of Electrical-machining Engineers
影响因子：
--
作者：
Haruka Takeuchi;M. Kunieda
通讯作者：
Haruka Takeuchi;M. Kunieda
DOI：
10.1007/s00170-013-5243-z
发表时间：
2015
期刊：
The International Journal of Advanced Manufacturing Technology
影响因子：
--
作者：
S. Barman;N. Hanumaiah;A. B. Puri
通讯作者：
S. Barman;N. Hanumaiah;A. B. Puri
DOI：
10.1007/s00170-012-4235-8
发表时间：
2013-03
期刊：
The International Journal of Advanced Manufacturing Technology
影响因子：
--
作者：
G. Paul;S. Roy;S. Sarkar;N. Hanumaiah;S. Mitra
通讯作者：
G. Paul;S. Roy;S. Sarkar;N. Hanumaiah;S. Mitra
DOI：
10.1007/s00170-009-2298-y
发表时间：
2010-05-01
影响因子：
3.4
作者：
Kibria, G.;Sarkar, B. R.;Bhattacharyya, B.
通讯作者：
Bhattacharyya, B.