| 摘要 |
PROBLEM TO BE SOLVED: To heighten machining efficiency to a workpiece part formed of a pin part or a journal part of a crankshaft. SOLUTION: The pin parts 1a, 3a, 5a of three crankshafts 1, 3, 5 are held by a clamp mechanism 7 through a polishing tape 33, and in this state, the center crankshaft 3 is driven in rotation by a motor 45. Thus, the pin part 3a of the crankshaft 3 is swiveled around the journal part 3c, and with this swivelling motion, the clamp mechanism 7 is also swivelled so that in the crankshafts 1, 5 on both sides, the pin parts 1a, 5a are also swivelled around the journal parts 1c, 5c thereof. At this time, the polishing tape 33 is relatively moved to the pin parts 1a, 3a, 5a of three crankshafts 1, 3, 5, thereby polishing a workpiece. COPYRIGHT: (C)2007,JPO&INPIT |
