Effect of an external magnetic field on micro-EDM milling of Inconel 718
Effect of an external magnetic field on micro-EDM milling of Inconel 718
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DOI：
10.1007/s00170-022-09973-9
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发表时间：
2022-08
期刊：
影响因子：
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通讯作者：
Xiangyu Xu;Kan Wang;Y. Liu
中科院分区：
文献类型：
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作者：
Xiangyu Xu;Kan Wang;Y. Liu
微细电火花加工是一种可行的微细结构加工方法。在微细电火花加工过程中施加外加磁场是改善加工特性的一种简便方法。然而，仍然没有达成一致意见的影响，外部磁场对加工表面质量。而研究外加磁场方向对加工特性的影响的文献较少。在这项研究中，外磁场对等离子体通道的影响进行了探讨。进行了有无外加磁场辅助的微细电火花铣削实验，外加磁场方向选择为平行或垂直于铣削进给方向。对加工表面进行了观察和分析。讨论了外加磁场对材料去除率（MRR）、相对刀具磨损率（RTWR）和表面粗糙度（Ra）的影响。实验结果表明，适当强度的外磁场可以减少短路次数，但对MRR有轻微的负面影响。得出了在微细电火花铣削加工中施加平行于进给方向的外加磁场可以降低加工表面粗糙度的一般结论。
Micro-electrical discharge machining (micro-EDM) is a feasible method for machining microstructures. Applying an external magnetic field during micro-EDM is a convenient method for improving processing characteristics. However, there is still no agreement on the effect of an external magnetic field on the machined surface quality. And few papers explored the effect of direction of an external magnetic field on machining characteristics. In this study, the effect of an external magnetic field on plasma channel was explored. Micro-EDM milling experiments with and without the assistance of an external magnetic field were conducted, and the external magnetic field direction was selected to be parallel or perpendicular to the feed direction of milling. The machined surface was observed and analyzed. The effect of the external magnetic field on material removal rate (MRR), relative tool wear ratio (RTWR), and surface roughness (Ra) is discussed. The experimental results show that an external magnetic field of appropriate intensity can reduce the number of short circuits but has a slightly negative influence on MRR. The general conclusion that an external magnetic field parallel to the direction of feed can reduce surface roughness in micro-EDM milling can be drawn.