A Study on the Effect of Cryogenic Treatment Electrodes for EDM Coke

• Main Authors: Chen Dung Yan, 陳東演
• Other Authors: Huang.Li-Ren
• Format: Others
• Language: zh-TW
• Published: 2012
• Online Access: http://ndltd.ncl.edu.tw/handle/10781911354622919634

碩士 === 中州科技大學 === 工程技術研究所 === 101 === ABSTRACT The EDM electrode coke confuses the industry and researchers for a long time. So the copper electrodes after cryogenic treatment were introduced by this research. The relationship of electrode coke and EDMed parameters of polarity, duration time, discharge gap distance, high-voltage current, and low-voltage current of electrical discharge machining (EDM) were mainly processing parameters with powder metallurgical sintered alloy steel in this study. The experimental results explored material removal rate (MRR), electrode wear rate (EWR), workpiece and electrode surface roughness highly relates processing parameters. Therefore, the statistical method and the contribution of relation with EDMed sintered alloy steel by Taguchi method of orthogonal array planning experiments. Analysis of variance by polarity, duration time, discharge gap distance, high-voltage current, and low-voltage current are the main processing parameters. Reduced electrode coke by ANOVA were negative polarity, 100 s duration time, 8 % discharge gap distance, 3 amp high-voltage current, and 1 amp low-voltage current. Keywords: EDM, Cryogenic treatment, Taguchi method