Work holders – Holder mounted for movement – Relative to a station
Patent
1976-06-21
1977-07-19
Smith, Al Lawrence
Work holders
Holder mounted for movement
Relative to a station
29 38C, 279 4, 279 50, 408 71, B23Q 116, 2 9
Patent
active
040364844
ABSTRACT:
Advancing mechanism for a series of fixtures having collets for workpieces are actuated by a fluid actuated double-acting cylinder to lock and unlock the collet. A driven rotatable table has a plurality of equally spaced fixtures mounted thereon which are advanced seriatim to a plurality of machining stations where work is performed thereon. Each advancement moves a fixture to the unloading and loading station where the collet is released, the finished workpiece removed and a workpiece to be machined placed within the collet. The double-acting cylinder was actuated by the fluid to release the collet and after a workpiece was placed therein a reversal of the fluid clamped the collet in secured position. The collet is locked and unlocked by the operation of a transverse pin in a sloping slot in a sleeve which is advanced over the collet to move the sections of the head into clamped position to hold the workpiece. The table is driven to advance the collets the distance the fixtures are spaced apart and are accurately located by a shot pin which enters a hole in the table. Thereafter a dwell time is provided during which work is performed on the workpieces located at each of the stations. Any number of stations may be provided depending upon the number of machining operations to be performed.
REFERENCES:
patent: 2801110 (1957-07-01), Squiller
patent: 3720475 (1973-03-01), Leacock
Smith Al Lawrence
Watson Robert C.
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