Study of wire breaking process and monitoring of WEDM

被引:61
作者
Liao, YS
Chu, YY
Yan, MT
机构
[1] Department of Mechanical Engineering, National Taiwan University, Taipei
关键词
D O I
10.1016/S0890-6955(95)00049-6
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
Wire rupture in the Wire Electrical Discharge Machining (WEDM) process is a serious problem to manufacturers. A new computer-aided pulse discrimination system based on the characteristics of voltage waveform during machining was developed in this paper. With the use of this system, a large amount of sparking frequency data during wire rupture process and under normal working conditions were collected and analyzed. Two symptoms of wire rupture were identified: the excess of are sparks, and a sudden rise of the total sparking frequency. The governing mechanisms of these two types of wire rupture were found from the SEM and EDAX analyses of the ruptured wire electrode. Furthermore, an index to monitor wire breaking was identified, and its relationships with the metal removal rate and machining parameters were found. Based on the results obtained in the paper, a control strategy to prevent wire from rupturing while at the same time improving the machining speed is proposed. (C) 1997 Published by Elsevier Science Ltd.
引用
收藏
页码:555 / 567
页数:13
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