Turning – Severing or cut-off – Automatic and/or triggered control
Patent
1974-02-01
1976-03-23
Vlachos, Leonidas
Turning
Severing or cut-off
Automatic and/or triggered control
279 1R, 279 4, 82 30, B23B 3300, B23B 3130
Patent
active
039452751
ABSTRACT:
A rotary jaw chuck work holder for a machine tool or the like, with a central opening through which stock is fed and a detector sensitive to the presence of sufficient stock for safe gripping by the chuck jaws beyond the opening. A rod is movable by air pressure in a passage of the chuck that communicates with the central opening. The extent to which the rod moves depends upon the presence or absence of a workpiece in the central opening. Air is supplied to the rod passage of the work holder through an annular manifold part of which is movable into contact with the work holder in response to air flow to the manifold. When moved against the work holder, the manifold supplies air to the rod passage without regard to the rotational position of the work holder. In the absence of sufficient stock, the air pressure will move the rod to a position that vents the rod passage, causing a loss in pressure that is sensed by a pressure responsive switch in a control circuit, which then prevents operation of the machine that rotates the work holder.
REFERENCES:
patent: 2625061 (1953-01-01), Mansfield
patent: 3200680 (1965-08-01), Coffin
patent: 3373641 (1968-03-01), Hermann
The S-P Manufacturing Corporation
Vlachos Leonidas
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