磁场强度对锯丝表面磁性磨粒层形成的影响

Investigation on the effect of magnetic field strength on the formation of magnetic abrasive layer on the saw wire surface

为了进一步揭示磁性磨粒在锯丝四周的排布规律和磁性磨粒聚集形状,开展了吸附于锯丝表面的磁性磨粒层形成机理研究。根据磁性磨粒的受力特性,建立了磁性磨粒层形成的数学模型,并仿真研究磁场强度对磁性磨粒层的影响规律;结合高速摄影和磁场发生装置设计并搭建观测实验平台,微观研究了磁性磨粒层的形成过程。结果表明:镀镍碳化硅磁性磨粒仅在顺磁区吸附,形成磁性磨粒层,其轮廓近似扇环形;磁场强度增大,磁性磨粒层堆积厚度增大。

In order to further reveal the distribution of magnetic abrasive around the saw wire and the accumulation shape of magnetic abrasive, the magnetic abrasive layer formation mechanism was studied. Based on the force analysis of the magnetic abrasive, the theoretical model of the magnetic abrasive layer formation was established, and the adsorption of magnetic abrasive layer on the saw wire surface under different magnetic field intensities was studied by using the numerical analysis software. An observation platform was designed by combining the high-speed camera and the magnetic field generation device, to analyze the formation of magnetic abrasive layer. The experimental researches were conducted to validate the theoretical model. The results show that the contour line of the magnetic abrasive layer adsorbed on the saw wire surface can be approximately regarded as a ring shape, and the magnetic abrasive layer thickness increases as the magnetic field strength increases.