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    题名: Effect of surface roughness of tool electrode materials in ECDM performance
    作者: Yang,CK;Cheng,CP;Mai,CC;Wang,AC;Hung,JC;Yan,BH
    贡献者: 機械工程學系
    关键词: CHEMICAL ENGRAVING SACE;DISCHARGE MACHINING ECDM;CERAMIC MATERIALS;GLASS
    日期: 2010
    上传时间: 2012-03-27 17:02:37 (UTC+8)
    出版者: 國立中央大學
    摘要: Electrochemical discharge machining (ECDM) is an emerging non-traditional machining process that involves high-temperature melting assisted by accelerated chemical etching. In this study, the tool electrode (200 mu m in diameter) is fabricated by wire electrical discharge grinding (WEDG). After the tool electrode is machined, the surface roughness of tool electrode materials (stainless steel, tungsten carbide, and tungsten) is different because of the physical properties. However, the surface roughness affects the wettability on tool electrode, and also changed the coalesce status of gas film in ECDM. Hence, this study explores the wettability and machining characteristics of different tool electrode materials and their impact on gas film formation. Their machining performance and extent of wear under gravity-feed micro-hole drilling are also examined. Experimental results show that the optimal voltage of different tool electrode can shed light on the machining performance. Moreover, wettability of tool electrode is determined by surface roughness of tool material, which in turn affects the coalesce status of gas film, machining stability and micro-hole diameter achieved. In addition, differences in tool material also results in variations in machining speed. Significant tool wear is observed after repeated gravity-feed machining of 50 micro-holes. (C) 2010 Elsevier Ltd. All rights reserved.
    關聯: INTERNATIONAL JOURNAL OF MACHINE TOOLS & MANUFACTURE
    显示于类别:[機械工程學系] 期刊論文

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