Means for moving reciprocable carriages for indexible tool turre

Details Means for moving reciprocable carriages for indexible tool turre Means for moving reciprocable carriages for indexible tool turre

1974-09-12

1976-03-30

McGehee, Travis S.

Metal working

Plural diverse manufacturing apparatus including means for...

With turret mechanism

29 355, 82 21R, B23B 704

Patent

active

039464717

ABSTRACT:
An automatic lathe wherein the carriage for an indexible tool turret is biased against a stop and can be moved toward the work spindle by a rotary cam which is driven by a hydraulic motor and is arrested by a hydraulic brake when the carriage reaches a selected position. The motor is automatically decelerated to crawling speed prior to complete stoppage of the cam and the brake is applied subsequent to deceleration of the motor and simultaneously with opening of an arresting valve which connects the supply and return conduits for the motor. The supply conduit continues to receive some pressurized fluid while the motor is at a standstill. Abrupt acceleration of the motor is prevented by maintaining the arresting valve in open position after a motor valve increases the rate of fluid flow from a pump to the supply conduit and by closing the arresting valve simultaneously with disengagement of the brake.

REFERENCES:
patent: 2870656 (1959-01-01), Bechler
patent: 3060466 (1962-10-01), Kozacka
patent: 3481231 (1969-12-01), Cormier
patent: 3492897 (1970-02-01), Cunningham et al.
patent: 3590965 (1971-07-01), Oppenheimer
patent: 3593597 (1971-07-01), Jennings
patent: 3690201 (1972-09-01), Link

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