EDM characteristics of metal impregnated graphite electrode

被引：0

作者：

Okada, A ^{[1
]}

Uno, Y ^{[1
]}

Takagi, T ^{[1
]}

Yokotani, M ^{[1
]}

机构：

[1] Okayama Univ, Okayama 7008530, Japan

来源：

PROGRESS OF MACHINING TECHNOLOGY: WITH SOME TOPICS IN ADVANCED MANUFACTURING TECHNOLOGY | 2002年

关键词：

EDM; graphite electrode; metal impregnated graphite electrode; electrode wear; surface roughness;

D O I：

暂无

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

In EDM process, graphite is widely used as an electrode. However, in EDM with graphite electrode under finish condition, the electrode wear is larger, and it is difficult to form thin and fine shapes by mechanical machining, because of its high brittleness. Therefore, graphite electrode cannot be applied to EDM with fine complicated shapes. In order to achieve high precision EDM with graphite electrode, graphite electrodes impregnated with metal were newly developed in this study. That is, copper or aluminum was impregnated into pore parts of graphite-grains-sintered electrode for improving its strength and heat conductivity. Next, the EDM characteristics were investigated. Experimental results indicated that the machined surface roughness in the case for metal impregnated graphite electrode became much smaller, compared with normal graphite electrode, while there was no difference in the electrode wear and removal rate among them. Additionally, the reasons for smaller machined surface roughness were analyzed, and it was made clear that small surface roughness obtained by using metal impregnated electrodes was caused by small roughness of electrode end surface and the effect of metal powder mixed machining fluid.

引用

页码：402 / 407

页数：6