| 摘要 |
793,001. Machine-tool details. SOC. ANON. DES ANCIENS ETABLISSEMENTS C. BERTHIEZ. Nov. 22, 1955 [July 20, 1955], No. 33418/55. Class 83 (3). An hydraulic clamping-device for machinetool-slides, comprises a clamping-shoe or shoes operated by a piston-and-cylinder device or devices in which fluid is fed to the latter from a damping-fluid-chamber having a power-piston subjected to the action of a potential-energy source, release being effected by auxiliarypressure-fluid urging the power-piston against the action of the potential-energy-source. A machine-tool-carriage 2 sliding on a base 1 is clamped thereto by a pad 3 drawn up against a ledge 1a on the base and the overlapping part 2a of the carriage. The pad is pulled by a rod 4 connected to a piston 5a in a cylinder 6a of the carriage. Fluid-pressure for clamping is led into the cylinder through a conduit 9a, and the piston 5a operates against a spring 7a, which unclamps the parts when pressure is reduced. Clamping-pressure is effected by a mastercylinder 12 in which a strong spring 15 acts through a plunger 14 to compress fluid in the space 13 below the plunger. To unclamp the slide, a valve 21 is moved upwards by a solenoid 25 to admit pressure-fluid from a pump 16 and relief-valve 19 to the space 26 beneath the plunger-piston 27. Compensation for leakage in the clamping-system is effected by a further pump 30 which feeds fluid to a recess 29 around the plunger 14, which is uncovered each time the plunger reaches its uppermost position. Other forms of clamps, operated in a similar manner, are shown on the carriage 2. |
