| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a grinding method free from control of working pressure, and an abrasive used in the same. <P>SOLUTION: A lower magnetic pole iron core 2 and an upper magnetic pole iron core 3 are excited by electromagnets (coils) 5, 10 connected with a power source 14. A ground sample 1 is fixed on the lower magnetic pole iron core 2, and the abrasive 4 composed of new developed magnetic grinding fluid is put between the lower magnetic pole iron core 2 and the upper magnetic pole ion core 4. The lower magnetic pole iron core 2 is driven and rotated by an AC servo motor 7 through a coupling 6. Similarly, the upper magnetic pole iron core 3 is driven and rotated in the direction opposite to the rotating direction of the lower magnetic pole iron core 2 by an AC servo motor 10 through a coupling 11. Rotating speeds of the AC servo motors 7, 10 are respectively detected by speed meters 8, 13 and controlled on the basis of a specific rotational frequency by a speed control device (not shown in Figure). The magnetic field is applied to the magnetic grinding fluid by applying the magnetic field which is stationary or variable in time, by an electromagnet. <P>COPYRIGHT: (C)2005,JPO&NCIPI |
