Control means for a bar holder and feeder coupled to an automati

Details Control means for a bar holder and feeder coupled to an automati Control means for a bar holder and feeder coupled to an automati

1975-07-29

1978-05-09

Blunk, Evon C.

82 27, B23Q 522

Patent

active

040882306

ABSTRACT:
Control means for a bar holder and feeder coupled to an automatic machine tool to hold bars for and feed bars to the machine tool and having feed means to feed a bar from the bar holder through a collet of the machine tool, the control means comprising counting means settable to a determined number; trip means operable when in a set position to trip the counting means once for each work piece machined; trigger means effective to move said trip means to the set position when a new length of bar is fed into the bar holder; and coupling means coupling the counting means to means controlling machining operation of the machine tool; said determined number being settable so that, after a number of workpieces equal to said determined number have been machined from a length of bar preceding said new length of bar, such that the remnant of said length of bar is not of sufficient length safely to permit machining of a further workpiece therefrom, the counting means cause the coupling means to stop the machine tool and cause the feed means to eject said remnant from the collet of the machine tool, by feeding the forward end of said new length of bar through the collet.
Preferably a dead stop of the machine is movable laterally by an air ram to allow the feed means to feed the remnant of an old bar therebeyond and is restored to its old position when the feed means have moved forward one workpiece length to stop the new bar in the correct position for machining.

REFERENCES:
patent: 1174361 (1916-03-01), Simmons et al.
patent: 1295439 (1919-02-01), Coveney
patent: 3328052 (1967-06-01), Nilsson
patent: 3802689 (1974-04-01), Doe
patent: 3941256 (1976-03-01), Doe et al.

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