| 摘要 |
PURPOSE:To enable setting the position of a groove cut by a cutter, at an optional depth of a hole, by automatically protruding the cutter in proportion to its quick. CONSTITUTION:A driving shaft 23 is fitted in a main hollow shaft 25. The driving shaft is rapidly rotated in the same direction as the hollow shaft. The driving shaft and the hollow shaft are separately accelerated or decelerated in rotation. A cutter 38 is protruded or retracted in the radial direction of the hollow shaft and the driving shaft depending on the revolution speed difference between them. The cutter 38 is rapidly rotated by a spindle 1. The cutter is gradually protruded in the radial direction in proportion to its rotation. The cutter can be automatically protruded to optionally set a position of a cut groove on the inside surface of a hole. The groove can be cut in any position in the hole by a single unit. |
