Comparative study on discharge conditions in micro-hole electrical discharge machining of tungsten carbide (WC-Co) material

被引：2

作者：

Hyun-Seok TAK ^{[1
]}

Chang-Seung HA ^{[2
]}

Dong-Hyun KIM ^{[2
]}

Ho-Jun LEE ^{[2
]}

Hae-June LEE ^{[2
]}

Myung-Chang KANG ^{[1
]}

机构：

[1] National Core Research Center for Hybrid Materials Solution,Pusan National University

[2] Department of Electrical Engineering,Pusan National University

来源：

Transactions of Nonferrous Metals Society of China | 2009年 / 19(S1)卷 / S1期

关键词：

micro-hole; electrical discharge machining; tungsten carbide; electro-optical observation;

D O I：

暂无

中图分类号：

TB302 [工程材料试验];

学科分类号：

0805 ; 080502 ;

摘要：

WC-Co is used widely in die and mold industries due to its unique combination of hardness, strength and wear-resistance. For machining difficult-to-cut materials, such as tungsten carbide, micro-electrical discharge machining(EDM) is one of the most effective methods for making holes because the hardness is not a dominant parameter in EDM. This paper describes the characteristics of the discharge conditions for micro-hole EDM of tungsten carbide with a WC grain size of 0.5 μm and Co content of 12%. The EDM process was conducted by varying the condenser and resistance values. A R-C discharge EDM device using arc erosion for micro-hole machining was suggested. Furthermore, the characteristics of the developed micro-EDM were analyzed in terms of the electro-optical observation using an oscilloscope and field emission scanning electron microscope.

引用

页码：114 / 118

页数：5