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US 10,618,117 B2Granted
Chuck with vibration damping
AssigneeFranz Haimer Maschinenbau KG
InventorFranz Haimer
Life of this patent
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Abstract
A tool chuck for clamping a tool in a machine tool, having a base body and a sleeve part protruding therefrom, which sleeve part forms a tool holder for fixing a tool shaft in a frictional, nonpositive fashion; a cavity in which a vibration damping component is accommodated is provided in the tool chuck.
Claims13
A tool chuck for clamping a tool in a machine tool, tool chuck comprising:
- a base body;
- a sleeve part protruding from the base body and forming a tool holder for fixing a tool shaft in a frictional, nonpositive fashion;
- and
- a cavity in the tool chuck in which a vibration-reducing component is accommodated, wherein the cavity begins in a vicinity of a transition from the base body to the sleeve part, extends along an axis of rotation in a direction of the tool holder, and in the direction along the axis of rotation has, a length that is less than ⅖ a length of the tool holder in this direction, and wherein in both a radial direction and in the direction of the axis of rotation, the cavity is larger than the vibration-reducing component that the cavity accommodates;
- the vibration-reducing component rests directly on its outer circumference against an elastic layer within the cavity, and via the elastic layer the outer circumference of the vibration-reducing component indirectly contacts the inner circumference of the sleeve part and/or the base body and is held in a centered position in relation to the axis of rotation, and the elastic layer permits a movement of the vibration-reducing component in an essentially radial direction within the cavity, while end faces of the vibration-reducing component have complete freedom of motion;
- wherein the vibration-reducing component is a solid, metal, annular disc with a central opening, with a maximum dimension (Bmax) of the disc parallel to an axis of rotation being less than a maximum diameter (Dmax) of the disc, in accordance with the equation Bmax/Dmax≤2;
- and
- wherein the disc is made of a heavy metal, or of a material that contains a heavy metal.
5 more elements
A tool chuck for clamping a tool in a machine tool, wherein the tool rotates around an axis of rotation during operation, the tool chuck comprising:
- a base body;
- and
- a sleeve part with an inner opening extending in a direction of the axis of rotation, the sleeve part protruding from the base body and forming a tool holder for fixing a tool shaft in the inner opening in a frictional, nonpositive fashion;
- wherein the base body and the sleeve pan are separate components that are joined to each other in a frictional, nonpositive fashion not directly, but with an interposition of a damping material layer resulting in vibrations of the sleeve part being transmitted not unhindered to a spindle of the machine tool, and a conical gap is situated between the sleeve part and the base body and is filled with the layer of damping material, which allows the sleeve part and the base body to be pressed into each other in a centering fashion by compressive forces acting in a direction of the axis of rotation.
1 more element
A tool chuck for clamping a tool in a machine tool, the tool chuck comprising:
- a base body;
- and
- a sleeve part protruding from the base body and forming a tool holder for fixing a tool shaft in a frictional, nonpositive fashion;
- wherein the base body and the sleeve part are separate components that are joined to each other in a frictional, nonpositive fashion, not directly, but with an interposition of a damping material layer resulting in vibrations of the sleeve part being transmitted not unhindered to a spindle of the machine tool, and a conical gap is situated between the sleeve part and the base body and is filled with the layer of damping material, which allows the sleeve part and the base body to be pressed into each other in a centering fashion by compressive forces acting in a direction of an axis of rotation;
- and
- wherein end faces of the sleeve part and/or the base body that form the Rap have undercuts into which the damping material layer penetrates and produces a form-fitting engagement.
3 more elements
Dependencies are inferred from the claim text.