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US 8,522,443 B2Granted
Cutting edge for a cutting tool
AssigneeIrwin Industrial Tool Company
InventorsMark B. Latronico, Joseph Lutgen
Life of this patent
Estimating the term…
Abstract
A cutting tool comprises a first cutting edge and a second cutting edge movable into engagement with one another. The first cutting edge comprises an edge tip extending along at least a portion of the cutting edge. The edge tip has a geometry that lowers the cutting force required to cut hard articles and minimizes damage to the cutting edge. The edge tip has a flat end face defining a first edge and a second edge. A first side face extends from the first edge and a second side face extends from the second edge where the first side face and the second side face extend at an angle relative to one another such that the first side face and the second side face diverge as they extend away from the flat end face.
Claims21
A cutting tool comprising:
- a first cutting edge and a second cutting edge, said first cutting edge and the second cutting edge being movable into engagement with one another;
- said first cutting edge comprising an edge tip extending along at least a portion of said first cutting edge, said edge tip having a flat end face defining a first edge and a second edge where the flat end face has a width in the range of 0.002 to 0.008 inches;
- a first side face extending from the first edge and a second side face extending from the second edge where the first side face and the second side face extend at an angle relative to one another such that the first side face and the second side face diverge as they extend away from the flat end face and are disposed at an angle relative to one another in the range of 66 degrees to 74 degrees wherein the edge tip defines a central axis and the first side face and the second side face extend at an angle of between approximately 33 and 37 degrees with respect to the central axis.
A cutting tool comprising:
- a first cutting edge and a second cutting edge, said first cutting edge and the second cutting edge being movable into engagement with one another;
- said first cutting edge comprising an edge tip extending along at least a portion of said first cutting edge, said edge tip having a flat end face defining a first edge and a second edge;
- a first side face extending from the first edge and a second side face extending from the second edge where the first side face and the second side face diverge as the first side face and the second side face extend away from the end face, the cross-sectional area of the tip between the end face and a distance 0.04 inches from the end face is approximately 0.001 square inches.
A method of making a cutting tool comprising;
- providing a first cutting edge and a second cutting edge where the first cutting edge and the second cutting edge are movable into engagement with one another;
- providing an edge tip along at a least a portion of the first cutting edge;
- shaping the edge tip to have a flat end face having a width within the range of 0.002 to 0.008 inches and a first angled side face extending from the flat end face and a second angled side face extending from the flat end face such that the first side face and the second side face diverge as they extend away from the flat end face, the first side face and the second side face being disposed at an angle relative to one another in the range of 66 degrees to 74 degrees wherein the edge tip defines a central axis and the first side face and the second side face extend at an angle of between approximately 33 and 37 degrees with respect to the central axis.
A cutting tool comprising:
- a first cutting edge and a second cutting edge, said first cutting edge and the second cutting edge being movable into engagement with one another;
- said first cutting edge comprising an edge tip extending along at least a portion of said first cutting edge, said edge tip having a flat end face defining a first edge and a second edge where the flat end face has a width in the range of 0.002 to 0.008 inches;
- a first side face extending from the first edge and a second side face extending from the second edge where the first side face and the second side face extend at an angle relative to one another such that the first side face and the second side face diverge as they extend away from the flat end face and are disposed at an angle relative to one another in the range of 66 degrees to 74 degrees wherein the first side face and the second side face extend from the flat end face a vertical distance of 0.015 inches.
A cutting tool comprising:
- a first cutting edge and a second cutting edge, said first cutting edge and the second cutting edge being movable into engagement with one another;
- said first cutting edge comprising an edge tip extending along at least a portion of said first cutting edge, said edge tip having a flat end face defining a first edge and a second edge where the flat end face has a width in the range of 0.002 to 0.008 inches;
- a first side face extending from the first edge and a second side face extending from the second edge where the first side face and the second side face extend at an angle relative to one another such that the first side face and the second side face diverge as they extend away from the flat end face and are disposed at an angle relative to one another in the range of 66 degrees to 74 degrees;
- a first relief surface extending from the first side face and a second relief surface extending from the second side face wherein the first relief surface and the second relief surface extend at an angle relative to one another where the first relief surface and the second relief surface diverge as they extend away from the first side face and the second side face, the first relief surface and the second relief surface are disposed at an angle relative to one another of approximately 30 degrees.
1 more element
Dependencies are inferred from the claim text.