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US 5,431,416 AGranted
Collet attachment/closer
OwnerJohn R. Thorntoninventor
Life of this patent
Estimating the term…
Abstract
A collet attachment apparatus for a lathe machine tool including a collet holder for engagement of a spring collet, a nose collet adapter chuck to be fastened to a standard master chuck for engagement of a collet holder. A rear spindle draw tube adapter fastens to a hydraulic actuator to cause axial movement of a drawbar and exert or release pressure on the spring collet. Various lock ring means are utilized to limit the axial movement of the drawbar and ultimately the pressure on the collet.
Claims10
A collet attachment means for rotating a machine tool having a drawbar means comprising, in combination:
- a collet holder means for holding a collet;
- a nose collet adapter chuck means for location within a forward and inside diameter of a master chuck for holding said collet holder means;
- a rear spindle draw tube adapter means for location within a rearward inside diameter of a hydraulic actuator drawbar for fastening to said hydraulic actuator drawbar, whereby said drawbar means passes through said rear spindle draw tube adapter means annularly on an inside diameter causing left or right axial movement to said collet within an inside diameter of said nose collet adapter chuck means at a time when said drawbar means is non-rotational;
- a first lock ring means to define axial distance boundaries of said drawbar means for further determining the amount of pressure exerted on a collet holding cavity;
- a second lock ring means coordinating with said first lock ring means to define said axial distance boundaries of said drawbar means for further determining the amount of said pressure exerted on said collet holding cavity;
- a draw tube nut means secured to said rearward most point of said drawbar means for controlling said axial movement of said collet by rotating said draw tube nut means in a clockwise or counterclockwise direction allowing said collet to be removed or inserted from or into said collet attachment means.
3 more elements
A collet attachment means for a machine tool comprising, in combination:
- a drawbar means for rotational actuation of said collet attachment means along a horizontal axis to perform an operation on a workpiece;
- a nose collet adapter chuck means for location within a forward and inside diameter of a master chuck for holding a collet holder means, said collet holder means being an annular configuration having therein at a collet holder inside diameter a collet holding cavity for encasing a collet;
- a locking means for prevention of relative rotational movement of said drawbar means with respect to a rear spindle draw tube adapter means along said horizontal axis during rotation of said drawbar means;
- wherein said rear spindle draw tube adapter means for location within a rearward inside diameter of a hydraulic actuator drawbar, for fastening to said hydraulic actuator drawbar, whereby said drawbar means passes through said rear spindle draw tube adapter means at an inside diameter of said rear spindle draw tube adapter means causing left or right axial movement of said collet within an inside diameter of said nose collet adapter chuck means at a time when said drawbar means is non-rotational;
- a first lock ring means for clockwise or counterclockwise rotation around said drawbar means to define axial distance boundaries of said drawbar means, for further determining the amount of pressure exerted on a tapered portion of said collet holding cavity to secure or release said workpiece from said collet;
- a second lock ring means for clockwise or counterclockwise rotation around said drawbar means to define axial distance boundaries of said drawbar means for further determining the amount of pressure exerted on said tapered portion of said collet holding cavity to secure or release said workpiece.
3 more elements
Dependencies are inferred from the claim text.