Machining of EN-31 is supposed to be very difficult by conventional machining methods. A rotational electrical discharge machine (REDM) has been developed with concentration of abrasive particles in oil. Investigations have been carried out for machining EN-31 material by REDM with graphite electrodes (Ge). Analysis of REDM process parameter has made to carry out on EN-31 for Surface Roughness (R_a) with graphite electrode (G_e). The experiments have been performed with three parameters: Peak current (P_c), tool rotation (T_rpm) and abrasive concentration (A_c). The variable concentration of silicon carbide (SiC) has been used to analyse the R_a at various concentration such as 60, 80 & 100 g/L. Optimal results have been obtained for process parameters, Pc – 12 amp, Trpm – 1800 rpm and Ge – 80 g/L.

中文翻译：

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用石墨电极进行REDM研究EN-31的表面粗糙度

传统的加工方法认为EN-31的加工非常困难。已经开发出旋转式放电加工机（REDM），其将磨料颗粒浓缩在油中。已经进行了使用石墨电极（Ge）的REDM加工EN-31材料的研究。REDM工艺参数的分析已在EN-31上针对带有石墨电极（G _e）的表面粗糙度（R _a）进行了分析。实验使用三个参数进行：峰值电流（P _c），工具旋转（T _rpm）和磨料浓度（A _c）。可变浓度的碳化硅（SiC）已用于分析R _a浓度为60、80和100 g / L。对于工艺参数Pc – 12 amp，Trpm – 1800 rpm和Ge – 80 g / L，已获得最佳结果。