High-speed electrochemical discharge drilling (HSECDD) for micro-holes on C17200 beryllium copper alloy in deionized water

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• 作者：Shuliang Dong ; Zhenlong Wang ; Yukui Wang
• 关键词：High speed ; EDM ; ECM ; Hole ; Beryllium copper ; Deionized water
• 刊名：The International Journal of Advanced Manufacturing Technology
• 出版年：2017
• 出版时间：January 2017
• 年：2017
• 卷：88
• 期：1-4
• 页码：827-835
• 全文大小：
• 刊物类别：Engineering
• 刊物主题：Industrial and Production Engineering; Media Management; Mechanical Engineering; Computer-Aided Engineering (CAD, CAE) and Design;
• 出版者：Springer London
• ISSN：1433-3015
• 卷排序：88

文摘

Beryllium copper alloys with excellent features are widely used in many engineering fields, and their fabrication requires high machining speed. However, the fabrication of beryllium copper alloys by traditional processes has serious problems. In this study, high-speed electrochemical discharge drilling (HSECDD), a hybrid process containing electrical discharge machining (EDM) and electrochemical machining (ECM) in deionized water, was used to machine micro-holes on C17200 beryllium copper alloy. The material removal mechanism of HSECDD was studied and compared with traditional EDM. The performance of the process was investigated under different conductivities of peak current and pulse width. The results show that HSECDD is a high-efficiency method to machine C17200 beryllium copper alloy. During HSECDD, the material removal depends mainly on EDM. And, the ECM occurs at the entrance region of micro-holes machined by EDM. The function of ECM is to expand the gap between the electrode and the hole. The machining speed and average diameter of micro-holes increase with the increasing of peak current and pulse width. Increasing the pulse width will reduce the electrode wear. However, the taper angle will increase. In addition, the results also show that a value of 0.34-A peak current and 10-μs pulse width can be considered an ideal parameter for HSECDD to machine micro-holes on C17200 beryllium copper alloy.