Hydraulic expansion chuck and method for producing such an expansion chuck
AssigneeKennametal Inc.
InventorJosef Konrad Herud
Life of this patent
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Abstract
A hydraulic expansion chuck includes a basic body, an expansion bush which is received in the basic body and defines a reception space for a tool to be clamped, and a pressure chamber which is delimited between the expansion bush and the basic body. A securing pin is provided, which extends through the basic body and the expansion bush into the reception space. A method for producing a hydraulic expansion chuck is disclosed. First, a basic body is provided with a blind hole, into which an internal thread is cut. Then, an expansion bush is soldered into the basic body. Finally, an orifice is made at the bottom of the blind hole and extends through the material of the expansion bush into a tool reception space which is delimited in the expansion bush.
Claims15
A hydraulic expansion chuck, comprising:
- a basic body;
- an expansion bush disposed within the basic body, the expansion bush defining a reception space for a tool to be clamped;
- the expansion bush and basic body being secured with respect to one another at a connection region, to prevent relative axial movement of the expansion bush and basic body with respect to one another;
- and
- a pressure chamber disposed between the expansion bush and the basic body;
- wherein a securing pin extends through the basic body and the expansion bush through the connection region, and into the reception space to engage a shank of the tool to be clamped.
A hydraulic expansion chuck, comprising:
- a basic body;
- an expansion bush disposed within the basic body, the expansion bush defining a reception space for a tool to be clamped;
- and
- a pressure chamber disposed between the expansion bush and the basic body;
- wherein a securing pin extends through the basic body and the expansion bush into the reception space to engage a shank of the tool to be clamped;
- wherein an inner end of the expansion bush includes a ring-shaped solder portion which is soldered to the basic body at a distance from the pressure chamber;
- and
- wherein the securing pin is threaded into a receptacle comprising a stepped bore with an internal thread, and wherein the stepped bore is surrounded on all sides by the ring-shaped solder portion, thereby preventing leakage from the pressure chamber.
A hydraulic expansion chuck, comprising:
- a basic body;
- an expansion bush disposed within the basic body, the expansion bush defining a reception space for a tool to be clamped;
- and
- a pressure chamber disposed between the expansion bush and the basic body;
- wherein a securing pin extends through the basic body and the expansion bush into the reception space to engage a shank of the tool to be clamped;
- wherein an outer end of the expansion bush includes a stepped solder portion which is soldered to the basic body;
- and
- wherein the stepped solder portion comprises a radially-oriented annular surface and an axially-oriented annular surface adjoining the radially-oriented surface.
Dependencies are inferred from the claim text.