| 摘要 |
PURPOSE:To provide a device with general-purpose properties and to improve productivity, by a method wherein a different curvature curved surface having three kinds of curvatures can be formed, and continuous machining can be applied in a range from a coarsening process to a grinding process by means of the same device. CONSTITUTION:A forming saucer 102, having the one curvature, for example, (r) of different curvature curved surface, intended to be formed on a blank 101, is carried, and is placed on the blank 101 so that the center of the forming saucer is coincided with that of the blank 101. Further, a fulcram block 115, situated to a fulcram holder 116 at the tip of a swing unit 117 is set in a grooved hole 105' formed in the forming saucer 102. Grinding grains are fed between the blank 101 and the forming saucer 102. Further, the curvature of a plate cam 103 is formed with the other curvature R by means of which a curved surface is formed on the blank 101. With this, preparation for forming a different curvature curved surface on the blank 101 is completed. With a switch turned ON, a swing unit arm 120 is reciprocated, and the holding member of the blank 101 performs circular movement. Further, a reference plate 112 performs reciprocating movement through the medium of a reference plate guide 124.
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