Kennametal Inc.

Charles Lisle Conway

Nicholas Joseph Henry

Kent Peter Mizgalski

Shi Chen

Lance David Brunetto

Michael Glenn Morrison

Linn R Andras

Paul D Prichard

Joseph Victor Nelson

Brad Daniel Hoffer

Thomas Owen Muller

Lance D Brunetto

A cutting assembly that is useful in an operation for chipforming removal of material from a workpiece. The cutting assembly includes a holder having a seat and containing a coolant delivery passage. A locking pin, which has a longitudinal locking pin bore, is affixed to the seat so the longitudinal locking pin bore is in communication with the coolant delivery passage. A cutting insert has a rake surface, a corner cutting edge region, a central cutting insert aperture, and a radial coolant trough with an orientation toward the corner cutting edge region. At least a portion of the locking pin is within the central cutting insert aperture. A clamp assembly attaches to the holder and engages the cutting insert. The clamp assembly has a diverter plate, which has a bottom surface defining a diverter bowl and a diverter channel. The longitudinal locking pin bore opening to the diverter plate whereby coolant flows into the diverter bowl and through the diverter channel into the radial coolant trough toward the corner cutting edge region.

Cutting insert assembly and components thereof

A cutting insert-shim assembly that has a cutting insert with a bottom surface and a plurality of interior coolant passages wherein each interior coolant passage has a coolant inlet in the bottom surface of the cutting insert. The shim has a first side surface and a second side surface and contains a cavity, which communicates with the coolant conduit. The cavity defines a first opening in the first side surface and a second opening in the second side surface. When the shim is in a first condition, the first side surface contacts the bottom surface of the cutting insert and the first opening provides a first level of coolant communication to the interior coolant passages in the cutting insert. When the shim is in a second condition, the second side surface contacts the bottom surface of the cutting insert and the second opening provides a second level of coolant communication to the interior coolant passages in the cutting insert.

Shim for a cutting insert and cutting insert-shim assembly with internal coolant delivery

A toolholder has a head region, which contains a slot separating the head region into a lower section and an upper section, with a lower seat and an upper section to retain a cutting insert. The head region contains a coolant entrance passage, which receives coolant from a coolant source, and a coolant delivery passage, which discharges coolant toward a cutting insert. The head region further contains a fastener bore, which receives a fastener. The fastener has an axial fastener bore which provides fluid communication between the coolant entrance passage and a coolant reservoir between the fastener and the fastener bore. The coolant delivery passage communicates with the coolant reservoir to receive coolant, which passed from the coolant entrance passage and through the axial fastener bore into the coolant reservoir.

Cutting assembly

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 only an inside rearward surface of a mounting bore of the insert along a line of contact and exerts a force downward and rearward on the insert. In addition, only a forward lower face of a head portion the clamp screw engages a top surface of the clamp.

Clamping tool holder

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. A guide pin prevents the clamp from twisting during tightening or loosening of the clamp. When a clamp screw is tightened, a nub of the clamp engages only an inside rearward surface of a mounting bore of the insert along a line of contact and the top surface of the cutting insert. In addition, only a forward lower face of a head portion of the clamp screw engages a top surface of the clamp.

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Ligonier, PA, United States of America

Charles Lisle Conway