Back to results
US 9,849,520 B2Granted
Inverted piloted collet chuck and applications thereof
AssigneeKennametal Inc.
InventorMichael R. McCormick
Life of this patent
Estimating the term…
Abstract
Collet chucks are described herein having design and architecture for minimizing and/or mitigating collet misalignment during rotary tool coupling operations. For example, a collet chuck comprises a housing for connection and rotation with a spindle about an axis of rotation, wherein the housing defines a socket for receiving a collet. The collet comprises a nose end engaging the socket and a second tapered end engaging a locknut assembly.
Claims16
A collet chuck comprising:
- a housing for connection and rotation with a spindle about an axis of rotation, the housing defining a socket;
- and a collet comprising a nose end engaging the socket and a second tapered end engaging a locknut assembly comprising a locknut;
- wherein the nose end of the collet has a tapered portion which decreases in diameter in the direction of the nose end;
- and wherein the socket has an interior tapered portion which engages the tapered portion of the nose end of the collet, the interior tapered portion having a complementary taper angle to the tapered portion of the nose end of the collet;
- wherein the locknut assembly further comprises a pilot clamping ring positioned within a bore of the locknut at a first radial clearance, wherein the pilot clamping ring engages the second tapered end of the collet and is positioned within a cylindrical inner surface of the housing at a second radial clearance.
2 more elements
A method of clamping a tool comprising:
- providing a collet chuck including a housing for connection and rotation with a spindle about an axis of rotation, the housing defining a socket and a collet having a nose end engaging the socket and a second tapered end for receiving a shank of a cutting tool in a central bore of the collet;
- positioning the cutting tool shank in the collet central bore;
- and collapsing the central bore by tightening a locknut assembly comprising a locknut engaging the housing, wherein the nose end of the collet has a tapered portion which decreases in diameter in the direction of the nose end;
- wherein the socket has an interior tapered portion which engages the tapered portion of the nose end of the collet, the interior tapered portion having a complementary taper angle to the tapered portion of the nose end of the collet:
- and wherein the locknut assembly further comprises a pilot clamping ring positioned within a bore of the locknut at a first radial clearance, wherein the pilot clamping ring engages the second tapered end of the collet and is positioned within a cylindrical inner surface of the housing at a second radial clearance.
2 more elements
Dependencies are inferred from the claim text.