Liu Yong, Xu Xiaodong, Guo Chunsheng, Kong Huanghai
Associated Engineering Research Center of Mechanics & Mechatronic Equipment, Shandong University, Weihai 264209, China.
Shenzhen Research Institute of Shandong University, Virtual University Park, Nanshan 518057, Shenzhen, China.
Micromachines (Basel). 2019 Jul 16;10(7):476. doi: 10.3390/mi10070476.
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 μm were obtained on Nickel-base superalloy 718 by using the spiral electrode with a diameter of 100 μm. 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.
作为最具前景的微加工方法之一，电化学微加工在金属微结构领域得到了广泛应用。详细研究了采用高速螺旋电极对镍基高温合金进行电化学微铣削。首先，利用有限元方法建立并分析了微电化学铣削的电场和流场模型。然后，预测了铣削轮廓，并分析了电极高速旋转对电解液促进和防止二次电解的作用。其次，通过实验分析了转速、电参数和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，使用直径为100μm的螺旋电极在镍基高温合金718上获得了一系列宽度约为150μm的微图形结构。实验和模拟结果表明，电极的高速旋转可以大大提高加工效率和稳定性。证明了采用高速旋转电极技术的微电化学铣削是加工微金属零件的有效方法。
