| 摘要 |
A processing apparatus is of such a design that two feed drums (1, 2), each having an outer periphery formed with a spirally extending threaded guide surface (4, 4) and adapted to be driven to rotate, are disposed so as to extend parallel to each other, and the feed drums (1, 2) are used to pass a roller (W) through between the feed drums (1, 2) by the rotation thereof while the roller (W) is caused to rollingly contact the mutually opposed threaded guide surface (4, 4), and includes a grinding stone (3) for processing a crowned portion of the roller (W) passing thorough between the feed drums (1, 2). The threaded guide surface (4) of the feed drums (1, 2) is divided into two axially juxtaposed divided threaded surface areas (4a, 4b) so that an outer peripheral surface of the roller (W) can be supported at two anteroposterior locations.
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