Fang Yiming, Wu Jinzhong
School of Mechanical and Electrical Engineering, Shaoxing University, Shaoxing 312000, China.
Materials (Basel). 2024 Jun 1;17(11):2670. doi: 10.3390/ma17112670.
The present work is aimed at studying the effects of the magnetorheological finishing process, using a low-frequency alternating magnetic field, on the finishing performance of 6063 aluminum alloy. The study investigates the influence of key excitation parameters such as current, frequency, excitation gap, and iron powder diameter on the material removal and surface roughness (Ra) of the finished workpiece by experiments. This study employs a single-factor experimental method, and the finish surface is analyzed by a Zigo non-contact white light interferometer. The magnetic field strength in the processing area increases with the increase in the excitation current and decreases with the increase in the excitation gap. When the current frequency is set to 1 Hz, the circulation and renewal of abrasives in the magnetic cluster is most sufficient, resulting in the optimal surface roughness value for the workpiece. According to the experimental results of the excitation parameters, more suitable process parameters were selected for a two-stage finishing experiment. The surface roughness of 6063 aluminum alloy was improved from 285 nm to 3.54 nm. Experimental results highlighted that the magnetorheological finishing using a low-frequency alternating magnetic field is a potential technique for obtaining nano-scale finishing of the 6063 aluminum alloy.
本研究旨在探讨采用低频交变磁场的磁流变抛光工艺对6063铝合金抛光性能的影响。该研究通过实验研究了电流、频率、励磁间隙和铁粉直径等关键激励参数对抛光后工件材料去除率和表面粗糙度（Ra）的影响。本研究采用单因素实验方法，并用Zigo非接触式白光干涉仪对抛光表面进行分析。加工区域的磁场强度随励磁电流的增加而增大，随励磁间隙的增加而减小。当电流频率设定为1Hz时，磁性磨料团簇中磨料的循环和更新最为充分，从而使工件的表面粗糙度值达到最优。根据激励参数的实验结果，为两阶段抛光实验选择了更合适的工艺参数。6063铝合金的表面粗糙度从285nm提高到了3.54nm。实验结果表明，采用低频交变磁场的磁流变抛光是一种获得6063铝合金纳米级抛光效果的潜在技术。
