Two stage chuck
OwnerMerton J. Graham, Paul H. Millerinventors
Life of this patent
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Abstract
A chuck assembly having jaws to grip an annular work-piece on its outer periphery while machining other surfaces including a face and bore and an expansible element to grip the bore surface of the annular work-piece while machining the outer surfaces and a face, with mechanism for actuating the jaws and expansible element alternately, the parts supporting the jaws and expansible element comprising an assembly adapted for mounting on the headstock of a lathe to permit machining of the work-piece by tools carried on the tool holders normally present in a lathe.
Claims5
A chuck assembly adapted to be mounted for rotation and axial movement in relation to the headstock of a lathe, comprising:
- a chuck having a body and a plurality of radially movable jaws adapted in a first machining position of the chuck to grip the periphery of an annular work-piece;
- a work-piece locating means associated with each jaw;
- an axially movable jaw actuating means;
- a first hydraulic means adapted to move said actuating means to and from work-piece gripping position;
- an expansible mandrel adapted for movement from a retracted first position to an advanced intermediate position in the bore of the annular work-piece;
- an axially movable support for said mandrel;
- a second hydraulic means for moving the mandrel from said first position to said intermediate position;
- a third hydraulic actuated means for expanding said mandrel in said bore to engage the work-piece;
- means causing said first hydraulic means to move the jaws to work-piece releasing position;
- means causing said second hydraulic means to move the mandrel and work-piece from the intermediate position to a second machining position of the chuck, and
- means causing said third hydraulic means to release the work-piece.
Dependencies are inferred from the claim text.