| 摘要 |
PROBLEM TO BE SOLVED: To efficiently work plural vibrating pieces by forming a spherical surface-shaped polishing surface except for a part in the direction of a shaft passing through the center of the spherical surface-shaped polishing surface. SOLUTION: A pre-work rectangular AT vibrating piece 1 and an abrasive 2 are put in a spherical pot 3 having a radius R, and when the spherical pot 3 is rotated in a circle of a radius (r), since the spherical pot 3 autorotates at the same time, an inclination of an XZ' plane of a rectangular AT vibrating piece 4 is formed so as to run along a spherical surface of the spherical pot 3 by the abrasive 2. The spherical pot 3 is formed as a spherical surface-shaped polishing surface except for a part in its shaft direction, and a side surface unused as a polishing surface in the spherical pot 3 is formed as a plane. |
