磁场方向对磁性磨粒的动力学特性及切缝宽度影响的研究

STUDY ON EFFECT OF MAGNETIC FIELD ORIENTATION ON THE KINEMATIC CHARACTERISTIC OF MAGNETIC ABRASIVE GRAIN AND KERF LOSS

建立不同磁场方向下的磁性磨粒的动力学模型,应用有限元软件COMSOL Multiphysics对磁性磨粒运动进行仿真研究。搭建磨粒吸附观测实验平台,采用高速摄影技术,实验研究磁场方向对磁性磨粒在锯丝表面吸附的影响,实验结果验证仿真研究的正确性。应用传统游离磨粒线锯和不同磁场方向下的游离磨粒线锯对光学玻璃K9进行切割对比实验,结果表明当磁场方向平行于工件进给方向放置时其切缝宽度最小,同时表明游离磨粒线锯切割技术中添加辅助匀强磁场的有效性。

A kinematic model of magnetic abrasive grain under different magnetic field orientations is set up and it is studied by FEM software COMSOL Muhiphysics. A direct observation on the adsorption of magnetic abrasive grain is performed at an experimental platform using high speed photography, which verifies the simulation results. Traditional free abrasive wire sawing and magnetic induction free abrasive wire sawing experiments under different orientations are done for optical glass K9. The results show that the kerf loss of K9 is minimum when the magnetic field orientation is parallel to the work-piece feed direction, which also validates the effectiveness of abrasive wire sawing method. adding uniform magnetic field in free