Threading machine chuck

Details Threading machine chuck Threading machine chuck

1991-01-10

1991-12-24

Schwartz, Larry I.

Turning

Work driver

279 1L, 279 33, B23B 522

Patent

active

050741764

ABSTRACT:
A rotatable chuck for supporting a plastic coated workpiece in a power driven threading machine is disclosed comprising workpiece engaging jaws mounted on the machine spindle for rotation therewith and for pivotal movement relative thereto radially inwardly and outwardly of the spindle axis. Each jaw pivotally supports an insert holder provided with a pair of inserts for engaging the outer surface of the workpiece. Each of the insert holders pivotally supports a centering link associated with an adjacent jaw so as to be actuated in response to pivotal displacement of the jaws radially inwardly of the spindle axis to control the attitude of the insert holders so that the inserts are directed radially inwardly of the spindle axis to assure a uniform gripping action by the two inserts of each holder upon engagement with the workpiece. The centering links also displace the workpiece to a centered position coaxial with the spindle axis during inward displacement of the jaws.

REFERENCES:
patent: 2444457 (1948-07-01), Marks et al.
patent: 2890888 (1959-06-01), Damijonaitis
patent: 2980434 (1961-04-01), Hoffman
patent: 3413667 (1968-12-01), Behnke
patent: 4688453 (1987-08-01), Schulze-Beckinghausen
patent: 4819274 (1989-04-01), Redman

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