| 摘要 |
PURPOSE:To enable a workpiece to be subjected to burr removal, bevelling, and drilling work such as spot facing from the outside, under the condition of drilling by the use of a cutting tool which projects, its cutter edges from slots in a sleeve. CONSTITUTION:Immediately after the end of drilling a workpiece X, the drill is replaced with a cutting tool 1 for removing burrs X2. The cutting tool 1 is arranged to allow cutter edge portions 8a to go in and come out of slots 7b at the end of a sleeve 7. Cutters 8 pivot through the engagement of worm gears 8b with a worm 5b when the sleeve 7 is rotated relative to a cutter swinging shaft 5, so that the edge portions 8a may go in and come out of the slots 7b respectively. |
