Magnetohydrodynamics Study on the Mechanism of Improving the Efficiency of Magnetic Field-Assisted Electrochemical Micro-Machining
Magnetohydrodynamics Study on the Mechanism of Improving the Efficiency of Magnetic Field-Assisted Electrochemical Micro-Machining
复制标题
DOI：
10.1007/s11665-023-08457-5
复制
发表时间：
2023-06
影响因子：
2.3
通讯作者：
Manfu Wang;Jingang Zhang;Weijia Tang;Mingxia Yang;Sifang Wang;G. Pang;Zhi-Li Zhang;Zhongxin Lan
中科院分区：
文献类型：
--
作者：
Manfu Wang;Jingang Zhang;Weijia Tang;Mingxia Yang;Sifang Wang;G. Pang;Zhi-Li Zhang;Zhongxin Lan
采用实验与仿真相结合的方法，研究了201不锈钢在无磁场辅助和有磁场辅助条件下的高精度微细电解加工。结果表明，电化学微加工18min后，样品的表面粗糙度降低到0.40 μm。此外，磁场的引入进一步提高了表面精度，使表面精度降低到0.20 μm。在相同的加工时间内，磁场辅助电解微细加工的表面粗糙度较低，说明磁场对加工效率的提高有着有利的影响。此外，还讨论了加工间隙中磁感线的分布特征。当磁感线近似平行于阳极表面且垂直于电场时，加工效率进一步提高。模拟结果表明，磁场的存在提高了阳极表面的电流密度和电解液的传质速率，加速了电化学反应行为。在电化学微加工过程中，外部永磁体提供了磁流体动力，促进了磁流体动力对流的发生。结果表明，电解液中的荷质传递加快，提高了处理效率。
High-precision surface of 201 stainless steel obtained by electrochemical micro-machining without or with magnetic field-assisted was studied by combining experiments and simulations. The results demonstrated that the surface roughness of the samples was reduced to 0.40 μm after 18 min electrochemical micro-machining. Besides, the introduction of the magnetic field further improved the surface accuracy and reduced it to 0.20 μm. At the same machining time, the magnetic field-assisted electrochemical micro-machining provided lower surface roughness, which indicated that the magnetic field had a favorable impact on the improvement of machining efficiency. Additionally, the distribution characteristics of magnetic induction lines in the machining gap were also discussed. When the magnetic induction lines were approximately parallel to the anode surface and perpendicular to the electric field, the processing efficiency was further improved. The simulation results showed that the current density on the anode surface and the mass transfer rate of the electrolyte were enhanced by the existence of the magnetic field, which accelerated the electrochemical reaction behavior. The external permanent magnet contributed magnetohydrodynamic force during electrochemical micro-machining promoting the occurrence of magnetohydrodynamic convection. Consequently, the charge and the mass transfer in electrolyte was expedited, indicating the improvement of processing efficiency.