| 摘要 |
PURPOSE:To uniformly polish a workpiece by dividing a lap surface coaxilly around a rotary shaft and rotating said divided surfaces so as to permit relative movement speeds to be made constant. CONSTITUTION:A group 2 of laps supported rotatably on a bearing 1 are adapted to extrapolate coaxial cylindrical alps 2a-2e in order, brought into close contact with each other, and made to be rotatable. And, a lap surface providing a cross sectional shape of a polishing surface is formed on the end surface of said united laps. In addition, pulley parts 4a-4e are respectively formed on the lower ends of the respective cylindrical laps 2a-2e, and belts 7a-7e are trained between said pulleys and a pulley 6 disposed on the driving device 5 for transmitting rotation. With the respective pulleys 4a-4e having diameters being set to provide prescribed relative movement speeds on the lap surface 3, uniform frictional sliding can be assumed at a central portion of the lap surface when a workpiece P such as a rod lens, etc., is driven in a state of the workpiece in contact with the lap surface 3. |
