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Abstract：
To extend the working life of products made of titanium alloy, it is necessary to improve the polishing method to diminish the remaining defects on the workpiece surface. The Halbach array-assisted magnetic abrasive particle polishing method for titanium alloy was employed in this work. The distribution of magnetic field strength was simulated and verified at first to learn the characteristics of the Halbach array used in this work. Then, the polishing performance of the polishing tool was studied by conducting the polishing test, which aimed to display the relationship between shear force and surface roughness with polishing time, and the surface morphology during polishing was also analyzed. Following the establishment of the response surface model, a study on the optimal polishing parameters was conducted to obtain the suitable parameters for maximum shear force and minimum surface roughness. The results show that the maximum shear force 6.11 N and minimum surface roughness Sa 88 nm can be attained, respectively, under the conditions of (1) polishing tool speed of 724.254 r·min-1, working gap of 0.5 mm, and abrasive particle size of 200 μm; and (2) polishing tool speed of 897.87 r·min-1, working gap of 0.52 mm, and abrasive particle size of 160 μm.
摘要：
为了延长钛合金产品的使用寿命，有必要改进抛光方法，以减少工件表面的残留缺陷。本文采用Halbach阵列辅助的钛合金磁性磨粒抛光方法。首先对磁场强度的分布进行了模拟和验证，以了解本工作中使用的Halbach阵列的特性。然后，通过进行抛光试验,研究了抛光工具的抛光性能,旨在显示剪切力与表面粗糙度随抛光时间的关系，并对抛光过程中的表面形貌进行了分析。响应面模型建立后,对最佳抛光参数进行了研究，以获得最大剪切力和最小表面粗糙度的合适参数。结果表明，可以达到最大剪切力6.11N和最小表面粗糙度Sa88nm，分别,在（1）抛光工具速度为724.254r·min-1，工作间隙为0.5mm的条件下，磨料粒度为200μm；（2）抛光工具速度为897.87r·min-1，工作间隙为0.52mm，和160μm的磨料粒度。
