Yamazaki Mazak Corporation

Tetsuya Kijima

Mikio Wakida

Koichi Kawamura

Takuya Il

Yukimasa Tashiro

Yutaka Wakikaido

Koji Abe

Hisao Goto

Yasuhiro Fujii

Takuya Ii

A rotational force transmission mechanism includes a shaft and an engagement member. The shaft is rotatable about a first axis. The shaft includes a leading end portion having a second groove and a first groove which is configured to receive a rotatable portion of a tool holder so that the shaft rotates the rotatable portion about the first axis. The engagement member is movable along the first axis between a first position and a second position and rotatable about the first axis together with the shaft. The engagement member includes an engagement portion configured to be received in the second groove. At least one of the shaft and the engagement member has an inclined surface that moves the engagement portion in a direction toward the first axis when the engagement member moves from the first position to the second position.

Rotational force transmission mechanism, turret tool rest, and lathe

A turret tool rest includes a main shaft, a turret turning shaft, a turret, a joint base, a mill housing connection shaft, and an engagement member. The main shaft rotates a tool. A part of the main shaft is provided in the turret turning shaft. The turret turning shaft has a first coupling hole. The turret is connected to the turret turning shaft via which the turret is rotated. The joint base has a second coupling hole. The mill housing connection shaft is connected to the joint base. The mill housing connection shaft is provided between the main shaft and the turret turning shaft. Each of the mill housing connection shaft, the joint base, the part of the main shaft, and the turret turning shaft are disposed to rotate around a rotation axis of the turret. The engagement member moves in the first coupling hole and the second coupling hole.

Turret tool rest and machine tool

A control panelhas a display screen. An operator turns a low-thrust pressing keyON in the menu key groupdisplayed on the display screen. In this state, the operator turns an operating dialof a manual pulse generator, thereby causing an encoderto generate pulses. When the encoderoutputs a pulse signal as a command signal, and a servomotoris driven in accordance with the command signal, the tailstock is advanced. With the distal end of a tailstock center contacting a center hole of the workpiece, the operator turns the operating dial, thereby finely adjusting the drive torque of the servomotor. Accordingly, the thrust of the tailstock center is finely adjusted, so that the tailstock center is pressed against the workpiece by a low thrust.

Tailstock device

Growing community of inventors

Niwa-gun, Japan

Tetsuya Kijima