Indexable cutting insert for machining composite materials
AssigneeKennametal Inc.
InventorJeffrey Francis Kovac
Life of this patent
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Abstract
An indexable cutting insert includes a top surface, a bottom surface, a plurality of peripheral side surfaces, and a plurality of cutting edges formed at an intersection between said top surface and plurality of side surfaces. A plurality of triangular-shaped serrations are positioned along the cutting edges, each serration comprising an apex and a pair of side surfaces that meet at a vertex. The serrations provide the cutting edges with both a positive axial rake angle and a negative axial rake angle, thereby reducing delamination when machining a composite material.
Claims19
An indexable cutting insert for machining composite materials, comprising:
- a top surface, a bottom surface and a plurality of peripheral side surfaces, said top and bottom surfaces and said peripheral side surfaces being joined to form cutting corners, the top surface having a rake face and a central plateau;
- a plurality of cutting edges formed at an intersection between said top surface and plurality of side surfaces;
- and
- a plurality of triangular-shaped serrations positioned along the cutting edges, each serration comprising an apex and a pair of side surfaces that meet at a vertex, the cutting edge comprising a base of each triangular-shaped serration,
- wherein the serrations on the cutting insert provide the cutting edges with both a positive axial rake angle and a negative axial rake angle, thereby reducing delamination when machining a composite material.
An indexable cutting insert for machining composite materials, comprising:
- a top surface, a bottom surface and a plurality of peripheral side surfaces, said top and bottom surfaces and said peripheral side surfaces being joined to form cutting corners, the top surface having a rake face and a central plateau;
- a plurality of cutting edges formed at an intersection between said top surface and plurality of side surfaces;
- and
- a plurality of triangular-shaped serrations positioned along the cutting edges, each serration comprising an apex and a pair of side surfaces that meet at a vertex, the cutting edge comprising a base of each triangular-shaped serration,
- wherein each cutting edge has an equal number of serrations, and
- wherein each serration is substantially identical to each other, and
- wherein the serrations on the cutting insert provide the cutting edges with both a positive axial rake angle and a negative axial rake angle, thereby reducing delamination when machining a composite material.
Dependencies are inferred from the claim text.