| 摘要 |
PCT No. PCT/FR89/00247 Sec. 371 Date Nov. 21, 1990 Sec. 102(e) Date Nov. 21, 1990 PCT Filed May 24, 1989 PCT Pub. No. WO89/11376 PCT Pub. Date Nov. 30, 1989.A revolving head for machine tool including one fixed frame, one spindle-bearer turret movable in rotation with respect to this frame, at least two tool bearer spindles fitted to the turret, rotation devices for the spindles and automatic driving devices to rotate the turret. The turret includes a first element secured to the frame and a second element movable with respect to the first element. The automatic driving devices includes an axial piston and a rotary piston to move respectively axially and in rotation the second element of the turret with respect to the first element.
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