Electrochemical discharge machining of non-conducting ceramics
Electrochemical discharge machining of non-conducting ceramics
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DOI：
10.14429/dsj.49.3846
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发表时间：
1999-08-01
影响因子：
0.9
通讯作者：
Sorkhel, SK
中科院分区：
文献类型：
--
作者：
Doloi, B;Bhattacharyya, B;Sorkhel, SK
The electrochemical discharge machining (ECDM) process is mostly applied for machining nonconducting engineering ceramic materials, such as aluminium oxides, zirconium oxides, and silicon nitrides, etc. Experiments on ECDM have been carried out according to designed experimental plan based on standard orthogonal array (L-g) to identify the optimal parametric conditions of ECDM process using Taguchi method of parametric optimisation. In this study, the signal-to-noise (SM) ratio and the ANOVA analyses are employed to find the relative contributions of the main machining parameters, such as applied voltage, electrolyte concentration and interelectrode gap in controlling the machining performance, such as material removal rate and radial overcut of the ECDM process. The confirmation of experimental results under optimal parametric condition are provided to ensure the improvement in quality characteristics of the ECDM process. The highly purified non-conducting zirconium oxide is used as workpiece material and aqueous KOH in stagnant condition as electrolyte with three different concentrations (i.e., 15 per cent, 25 per cent and 20 per cent). The applied voltage of pulsed d.c. power supply has three levels of 50 V, 60 V and 70 V and the three different interelectrode gap setting considered for the experiments are 20mm, 30mm and 40mm respectively.
