| 摘要 |
PURPOSE:To make minute spherical surface polishable for generation in a highly accurate manner, by attaching a spherical body, having the same radius as a radius of curvature on a concave pherical surface to be generated, tightly to a tip end part where a tool comes into contact with a work. CONSTITUTION:A tool shaft S, to which a spherical body 5 having the same radius R as a radius of curvature on a concave spherical surface to be generated on a work 1 is tightly attached by a bonding agent, is held by a chuck 15. And, when spherical polishing attachment is turned to ON, each of motors 11 and 16 rotates, and abrasives are fed to a polishing surface, causing the work 1 and the spherical body 5 to do relative motion, whereby abrasive grains are held between both and polishing is advanced. And, an axis 1' of the work 1 and an axis 4' of a tool 4 are tilted to some extent with each other so that generating abrasive on the spherical surface advances over the whole surface uniformly, and base 18 gradually moves to the left on a slide base 19 with the progress of operation, and when a projection 23 comes into contact with an axial end of a micrometer head 24, the generating abrasion is finished and the spherical polishing attachment is turned to OFF. Thus, since a highly accurate, minute radial spherical body is used, a highly precision concave spherical surface is polishable for generation.
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