| 摘要 |
PURPOSE:To reduce the polishing time improving surface roughness of a ball unit further enhancing its polishing efficiency by charging spherical workpiece therebetween with a spacer. CONSTITUTION:While holding a group of spherical workpieces 3, arranged on a circumference, by a driving lap 1, float 5 receiving levitating force by a magnetic field formed in magnetic fluid 7 by a magnet 6 and the internal peripheral surface of a guide ring 4, the driving lap 1 is rotated, polishing these spherical workpiece 3. When these workpieces are polished, the adjacent spherical workpieces 3 are charged therebetween with a spacer 8. By this charging spacer 8, the spherical workpieces 3 can be prevented from colliding against each other during polishing, and the workpiece 3 enables its surface roughness and polishing efficiency to be improve, as the result the polishing time can be reduced. |
