| 摘要 |
PURPOSE:To polish the necessary place only of a lapping surface plate by holding a hollow part on the outer peripheral part or inner peripheral part of the lapping surface plate by using a correction ring having a hollow part at an eccentric position. CONSTITUTION:In case of correcting a lapping surface plate in recessed shape, the wear of the outer peripheral side of a lapping surface plate 14 is performed by holding so that the hollow part 11 of a correction ring 12 is located at the inner peripheral side of the lapping surface plate 14, by rotating a sun gear 14 and internal gear in the same direction at the same angular velocity. As a result the necessary place only of the lapping surface plate 14 is concentrically worn and the wear of the part excepting the above can be minimized. |
