Cutting insert with a linear and a concave cutting edge portion
AssigneeKennametal India Limited
InventorKarthic Ramesh
Life of this patent
Estimating the term…
Abstract
A cutting insert includes a top face, a bottom face and a plurality of side walls extending between the top face and the bottom face. A peripheral cutting edge is defined at the juncture of each side wall and the top face. Each cutting edge includes a linear cutting edge portion and a concave cutting edge portion that curves inwardly in a plane that is perpendicular to a plane containing a central axis of the cutting insert. A radiused corner portion connects two adjacent cutting edges. Each linear cutting edge portion extends from one radiused corner portion to the concave cutting edge portion and the concave cutting edge portion extends from the linear cutting edge portion to another radiused corner portion.
Claims19
A cutting insert, comprising:
- a top face;
- a bottom face, wherein a central axis of the cutting insert extends through the top face and the bottom face;
- a plurality of side walls extending between the top face and the bottom face;
- a peripheral cutting edge defined at the juncture of each side wall and the top face, each cutting edge including a linear cutting edge portion and a concave cutting edge portion, wherein the concave cutting edge portion is a curved edge that curves inwardly in a plane that is perpendicular to a plane containing the central axis;
- and
- a radiused corner portion connecting two adjacent cutting edges, wherein each linear cutting edge portion extends from one radiused corner portion to the concave cutting edge portion and each concave cutting edge portion extends from the linear cutting edge portion to another radiused corner portion.
A cutting insert, comprising:
- an indexable, polygonal insert body having a top face, an opposing bottom seating surface and a plurality of side walls extending between the top face and the bottom seating surface;
- a peripheral cutting edge defined at the intersection of each side wall and the top face, each cutting edge including a linear cutting edge portion and a concave cutting edge portion that has a greater length than the linear cutting edge portion, wherein the concave cutting edge portion is a curved edge that curves inwardly in a plane that is perpendicular to a plane containing a central axis of the cutting insert that extends through the top face and the bottom seating surface;
- and
- the insert body further includes a radiused corner portion connecting two adjacent cutting edges, wherein each linear cutting edge portion extends from one radiused corner portion to the concave cutting edge portion and the concave cutting edge portion extends from the linear cutting edge portion to another radiused corner portion.
A drilling tool, comprising:
- a tool body having an axial rearward end having a shank portion and an axial forward end that defines an insert pocket;
- and
- a cutting insert structured and arranged to be removably received in the insert pocket of the tool body, the cutting insert comprising:
- a top face;
- a bottom seating surface, wherein a central axis of the cutting insert passes through the top face and the bottom seating surface;
- a plurality of side walls extending between the top face and the bottom seating surface;
- a peripheral cutting edge defined at the juncture of each side wall and the top face, each cutting edge including a linear cutting edge portion and a concave cutting edge portion, wherein the concave cutting edge portion is a curved edge that curves inwardly in a plane that is perpendicular to a plane containing the central axis;
- and
- a radiused corner portion connecting two adjacent cutting edges, wherein each linear cutting edge portion extends from one radiused corner portion to the concave cutting edge portion and each concave cutting edge portion extends from the linear cutting edge portion to another radiused corner portion.
Dependencies are inferred from the claim text.