| 摘要 |
PURPOSE:To perform the prescribed pitch feed of a hoop material with high accuracy and a small output by providing a torque mechanism for pulling the hoop material and a feed mechanism for intermittently feeding the hoop material at a prescribed pitch before and behind a machining head. CONSTITUTION:Sprocket wheels 13, 15 mounted on torque motors 9, 16 are respectively provided before and behind a machining head 18. And, keeping a state where the torque amounts of both torque motors 9, 16 are adjusted to be always equal to each other, the turning force of both torque motors 9, 16 is allowed to act on the hoop material 19 in the direction in which the hoop material 19 hung between the both wheels 13, 15 described above is pulled. Further, a pulse motor 14 is mounted on the same shaft as that of the torque motor 9 via couplings 11, 12. Hereby, the hoop material 19 is machined in the machining head 18 keeping a state where said material is pulled by equal balanced torque. Thereafter, the pulse motor 14 is operated to feed the hoop in the designated amount of pitch to complete one cycle. |
