To provide a fine recessed part working device capable of forming fine recessed parts with excellent accuracy on the circumferential surface of a work.
The fine recessed part working device comprises a form roller 15, a roller supporting member 13, a tool holder 10 to hold the roller supporting member 13, an actuator 12 to press the form roller 15 against the circumferential surface, a spindle 3 to roll the form roller 15 along the circumferential surface, and a spindle head 2 to move the tool holder 10 in the direction along the center axis of the circumferential surface. The roller supporting member 13 has a turning shaft 14 and a drive unit 18 to change the contact angle of the form roller 15 with respect to the circumferential surface. Fine recessed parts are formed with excellent accuracy on the circumferential surface, and the sectional shape of the fine recessed parts can be changed by the turning shaft 14 and the drive unit 18.
UEHARA YOSHITAKA
OTA MINORU
