UNIT-TYPE SPINDLE HEAD Russian patent published in 1994 - IPC

FIELD: machine tool manufacture. SUBSTANCE: head has body 1, main motion drive 2 and a tool feed pneumohydraulic drive which liquid cavity is connected to pneumohydraulic converter 12 by throttle 9 and liquid flow regulator 10. The gas cavity of the pneumohydraulic converter communicates with a compressed gas source by a valve and pneumatic distributors 14 and 15 which are connected to the gas cavity of the pneumohydraulic drive. The pneumohydraulic drive is made in the form of a double-piston pneumohydraulic cylinder 4 which is fastened to the head tail spindle, rod 6 of piston 7 is fastened to body 1 and piston 8 is freely mounted in pneumohydraulic cylinder 4. Time relay 19 connected to end switch 20 is installed between pneumatic distributors 14 and 15. The gas middle cavity of the pneumohydraulic cylinder is connected to pneumohydraulic converter 12 and pneumatic distributors 14 and 15 by pressure relay 21. The liquid cavity and the lower gas cavity of the pneumohydraulic cylinder communicate with safety pressure relay 22 connected to the pneumatic distributors. Throttle 23 is mounted on the line between pneumatic distributors 15 and pneumohydraulic converter 12. EFFECT: improved structure. 1 dwg