Adjustable chuck for gripping workpieces of different sizes at c

Details Adjustable chuck for gripping workpieces of different sizes at c Adjustable chuck for gripping workpieces of different sizes at c

1991-05-21

1992-08-04

Bishop, Steven C.

Chucks or sockets

With fluid-pressure actuator

With measuring, indicating or control means

279109, 279123, 279126, B23B 3124

Patent

active

051352427

ABSTRACT:
In an adjustable chuck for gripping workpieces of different sizes, three jaws are mounted for relative movement. A hydraulically driven mechanism is operable selectively for closing the jaws to grip a workpiece and for opening the jaws to free the workpiece. Two strain gauges on one of the jaws sense the gripping force applied by the jaws to the workpiece. A computer, which responds to the strain gauges, coacts with a control relay and with hydraulic valves to control flow of hydraulic fluid into and from the closing and opening mechanism. A system comprising a plurality of such chucks is contemplated, in which one computer coacts therewith to control the closing and opening mechanism of any selected chuck of the system, and which adjusts itself for minor variations among the system chucks.

REFERENCES:
patent: 3099457 (1963-07-01), Hohwart et al.
patent: 3423098 (1969-01-01), Hohwart et al.
patent: 3472526 (1969-10-01), Hohwart
patent: 4011777 (1977-03-01), McConnell
patent: 4254676 (1981-03-01), Wilson
patent: 4502704 (1985-03-01), Jackson
patent: 4536000 (1985-08-01), Rohm
patent: 4624466 (1986-11-01), Steinberger
patent: 4824126 (1989-04-01), Martin
patent: 4909521 (1990-03-01), Ovanin

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