| 摘要 |
PURPOSE:To apply equal processing to the oversurface and undersurface of a work by rotating an upper and a lower lapping machine at approx. the same speed in the identical direction. CONSTITUTION:A planet gear 14 is rotated round its own axis and also orbited by means of relative rotation of a sun gear 12 and an internally cogged gear 13, and at the same time, an upper and a lower lapping machine 10, 11 are rotated to perform lapping of both the oversurface and undersurface of a work 16 rotating in a single piece with this planet gear 14. Therein the two lapping machines 10, 11 are rotated at approx. the same speed in the identical direction. Further, the direction and speed in rotation of these lapping machines 10, 11 relative to the orbit of the planet gear 14 shall be approx. the same as the direction and speed in turning round own axis of the planet gear 14. Consequently the mean value of the relative speed with the lapping machines 10, 11 is made approx. the same in different parts of the work 16, which is rotating in a single piece with the planet gear 14, and thus the oversurface and undersurface of the work 16 can be processed simultaneously in equal processing condition. |
