Observation of arc plasma expansion and delayed growth of discharge crater in EDM

被引：0
|
作者：
Kojima, A. [1 ]
Natsu, W. [1 ]
Kunieda, M. [1 ]
机构：
[1] Tokyo Univ Agr & Technol, Dept Mech Syst Engn, Tokyo 1848588, Japan
来源：
PROCEEDINGS OF THE 15TH INTERNATIONAL SYMPOSIUM ON ELECTROMACHINING | 2007年
关键词：
EDM; arc plasma; discharge crater; spectroscopy;
D O I：
暂无
中图分类号：
TH [机械、仪表工业];
学科分类号：
0802 ;
摘要：
In this research, the relationship between the expansion of arc plasma and increase of discharge crater diameter during electrical discharge machining was investigated. Expansion of the plasma generated by a single pulse discharge was observed using a high-speed video camera. In order to identify the arc column area, where discharge current flows, the radial temperature distribution in the plasma was measured using spectroscopy, and the area with high degree of ionization was identified. As a result, it was found that the expansion of the arc column completes within a few microseconds after dielectric breakdown, while the diameter of the crater grows gradually with a much lower speed than the arc column.
引用
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页码：1 / 4
页数：4
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