Inconel718多通道放电烧蚀铣削加工技术研究

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英文篇名：Study on Multi-Channel Discharge Ablation Milling Processing of Inconel718 作者：傅炯波 ; 邱明波 英文作者：FU Jiongbo;QIU Mingbo;College of Mechanical and Electrical Engineering, Nanjing University of Aeronautics and Astronautics; 关键词：多通道放电烧蚀 ; 旋转多通道电极 ; Inconel718 ; 表面质量 ; 加工效率 英文关键词：Multi-channel discharge ablation;;Rotating multi-channel electrode;;Inconel718;;Surface quality;;Processing efficiency 中文刊名：HKGJ 英文刊名：Aeronautical Manufacturing Technology 机构：南京航空航天大学机电学院; 出版日期：2019-06-15 出版单位：航空制造技术 年：2019 期：v.62 基金：国家自然科学基金(51675272) 语种：中文; 页：HKGJ201912031 页数：5 CN：12 ISSN：11-4387/V 分类号：99-103

摘要

为了提高高温合金Inconel718电火花放电烧蚀加工效率,改善工件表面质量,使用多通道放电烧蚀加工新方法对Inconel718进行多通道放电烧蚀铣削加工试验。研究表明:在多通道放电烧蚀加工过程中,放电通道的个数是随机的;在一个脉冲放电周期中,随着通道数目的增加,电压波形呈阶梯下降,总回路电流波形呈阶梯上升。对比常规电火花烧蚀加工,多通道放电烧蚀加工的总回路电流提高,使得材料蚀除率提高73.7%;同时,多通道放电分散放电能量,使得多通道放电烧蚀加工后工件表面粗糙度较常规电火花烧蚀加工下降14.6%,工件表面微裂纹变少,裂纹的宽度和长度变小。
        To improve the electrical discharge machining(EDM) ablation efficiency of superalloy Inconel718 and enhance the post-ablation surface quality of the superalloy, the multi-channel discharge ablation milling experiments with Inconel718 were performed using a new method of multi-channel discharge ablation. The results show that the number of discharge channels was random in the multi-channel discharge ablation process. In a pulse discharge cycle, with an increase in discharge channels, the voltage waveform decreased stepwise while the current waveform rose stepwise. Compared with EDM ablation, the material removal rate(MRR) of Inconel718 with multi-channel discharge ablation increased by 73.7%,as the total loop current of multi-channel discharge ablation increased. In addition, as the multi-channel discharge dispersed the discharge energy, the surface roughness of the workpiece decreased by 14.6%, surface micro-cracks decreased, and recast layer thickness decreased.

引文

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