Song Wanli, Peng Zhen, Li Peifan, Shi Pei, Choi Seung-Bok
School of Mechanical Engineering and Automation, Northeastern University, Shenyang 110819, China.
Key Laboratory of Vibration and Control of Aero-Propulsion Systems Ministry of Education of China, Northeastern University, Shenyang 110819, China.
Micromachines (Basel). 2020 Mar 17;11(3):314. doi: 10.3390/mi11030314.
In this study, a novel magnetorheological (MR) polishing device under a compound magnetic field is designed to achieve microlevel polishing of the titanium tubes. The polishing process is realized by combining the rotation motion of the tube and the reciprocating linear motion of the polishing head. Two types of excitation equipment for generating an appropriate compound magnetic field are outlined. A series of experiments are conducted to systematically investigate the effect of compound magnetic field strength, rotation speed, and type and concentration of abrasive particles on the polishing performance delivered by the designed device. The experiments were carried out through controlling variables. Before and after the experiment, the surface roughness in the polished area of the workpiece is measured, and the influence of the independent variable on the polishing effect is judged by a changing rule of surface roughness so as to obtain a better parameter about compound magnetic field strength, concentration of abrasive particles, etc. It is shown from experimental results that diamond abrasive particles are appropriate for fine finishing the internal surface of the titanium-alloy tube. It is also identified that the polishing performance is excellent at high magnetic field strength, fast rotation speed, and high abrasive-particle concentration.
在本研究中，设计了一种新型的复合磁场下的磁流变（MR）抛光装置，以实现钛管的微观抛光。抛光过程通过管材的旋转运动和抛光头的往复直线运动相结合来实现。概述了两种用于产生合适复合磁场的励磁设备。进行了一系列实验，以系统地研究复合磁场强度、转速、磨粒类型和浓度对所设计装置的抛光性能的影响。实验通过控制变量进行。在实验前后，测量工件抛光区域的表面粗糙度，并根据表面粗糙度的变化规律判断自变量对抛光效果的影响，从而获得关于复合磁场强度、磨粒浓度等的更佳参数。实验结果表明，金刚石磨粒适用于钛合金管内表面的精整加工。还确定在高磁场强度、快速转速和高磨粒浓度下抛光性能优异。
