Analysis on Machining Performance of Nickel-Base Superalloy by Electrochemical Micro-milling with High-Speed Spiral Electrode
Analysis on Machining Performance of Nickel-Base Superalloy by Electrochemical Micro-milling with High-Speed Spiral Electrode
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DOI：
10.3390/mi10070476
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发表时间：
2019-07-01
期刊：
影响因子：
3.4
通讯作者：
Kong, Huanghai
中科院分区：
文献类型：
--
作者：
Liu, Yong;Xu, Xiaodong;Kong, Huanghai
微细电解加工作为最有前途的微细加工方法之一，在金属微结构领域得到了广泛的应用。采用高速螺旋电极对镍基高温合金进行了电化学微细铣削加工研究。首先，建立了微电解铣削的电场和流场模型，并采用有限元方法进行了分析。在此基础上，预测了电极高速旋转时的铣削形貌，分析了电极高速旋转对电解质促进和防止二次电解的影响。其次，实验分析了转速、电参数、进给速度等主要加工参数对加工精度和效率的影响。最后，通过优化加工参数，用直径为100 μ m的螺旋电极在718镍基高温合金上获得了一系列宽度约为150 μ m的显微形貌结构。实验和仿真结果表明，电极的高速旋转可以大大提高加工效率和稳定性。研究表明，高速旋转电极微细电解铣削加工技术是加工微细金属零件的一种有效方法。
As one of the most promising micro-machining methods, electrochemical micro-machining is widely used in the field of metal micro-structures. The electrochemical micro-milling on Nickel-base superalloy by using high-speed spiral electrode was studied in detail. Firstly, the electric field and flow field models of micro-electrochemical milling are established and analyzed by the finite element method. Then, the milling profile was predicted and the effect of high-speed rotation of electrodes on electrolyte promotion and secondary electrolysis prevention were analyzed. Secondly, the influence of the main machining parameters, such as rotating speed, electrical parameters, and feed rate on machining precision and efficiency was analyzed experimentally. Finally, by optimizing the machining parameters, a series of micro-graphic structures with a width of about 150 mu m were obtained on Nickel-base superalloy 718 by using the spiral electrode with a diameter of 100 mu m. The experimental and simulation results show that the high-speed rotation of electrodes can greatly improve the machining efficiency and stability. It was proved that micro-electrochemical milling with the high-speed rotating electrode technique is an effective method for machining micro-metal parts.