Clamping tool holder
AssigneeKennametal Inc.
InventorSamuel Eichelberger
Life of this patent
Estimating the term…
Abstract
A clamping tool holder includes a tool holder body and a clamp for clamping a cutting insert. The clamp causes the cutting insert to press against the bottom and the side walls of an insert-receiving pocket of the tool holder body. The tool holder body has an inclined surface sloping inward in a direction away from the insert-receiving pocket. The clamp has an inclined surface that acts as a ramp with the inclined surface of the tool holder body. When a clamp screw is tightened, a nub of the clamp engages an inside rearward surface of a mounting bore of the insert with face contact and a contact pad engages a top surface of the cutting insert. As a result, the clamp exerts a force downward and rearward force on the insert. In one aspect, the nub has a polygonal cross-sectional shape.
Claims14
A tool holder, comprising:
- a tool holder body including an insert-receiving pocket formed at a forward end thereof, the insert-receiving pocket having a bottom and at least one side wall for receiving the insert, the tool holder body further including a clamp-securing bore having a central axis forming an angle with respect to a plane of the tool holder body;
- a clamp arranged on the tool holder body, the clamp including a forward nose portion with a downward-extending nub, the clamp including a top surface portion, a bottom surface portion, and an aperture formed therethrough;
- a cutting insert mounted in the insert-receiving pocket, the cutting insert including a mounting bore having a radius;
- and
- a clamp screw capable of being inserted through the aperture of the clamp and at least partially received in the clamp-securing bore of the tool holder body to bring the clamp into pressing engagement with the cutting insert,
- wherein the nub is polygonal in cross-sectional shape comprising a first contact surface and a second contact surface, and
- wherein the first contact surface and the second contact surface of the nub are formed with a radius, R, that is identical to the radius of the mounting bore of the cutting insert, thereby providing face contact between the mounting bore of the cutting insert and the clamp when the clamp is brought into pressing engagement with the cutting insert.
Dependencies are inferred from the claim text.