| 摘要 |
Polygon manufacturing tool which can cut rapidly and economically a work to have a regular polygonal section. A spindle to which a work (1) is fitted is rotated at a speed at least twice the rotating speed of a tool shaft to which a tool (4) having a plurality of blades (P1, P2) that are disposed equiangularly, under the control of a numerical control unit. At the same time, the tool shaft is fed towards the spindle and cutting of the work is effected. With this cutting process, a pair of flat surfaces (1a, 1b) are formed gradually by each blade on the peripheral surface of the work and finally, the work is machined to have a predetermined regular polygonal section. |
