Cutting insert and pocket with uninterrupted and continuous seating surface perimeter
A round cutting insert has a seating surface with a plurality of projections formed on the seating surface proximate a central opening. The projections do not extend to an outer perimeter of the seating surface such that the outer perimeter is continuous and uninterrupted a full 360 degrees. An insert-receiving pocket includes a seating surface with a plurality of dimples for receiving the plurality of projections to prevent rotation of the cutting insert when mounted in the insert-receiving pocket. The plurality of dimples do not extend to an outer perimeter of the seating surface such that the outer perimeter is continuous and uninterrupted a full 360 degrees, thereby maximizing contact between the cutting insert and the pocket.
1. A round cutting insert comprising:
a first surface comprising:
a generally planar seating surface extending radially outward from a central opening to an outer perimeter of the seating surface;
a plurality of raised profile projections formed on the generally planar seating surface, wherein the plurality of projections do not extend to the outer perimeter of the generally planar seating surface, thereby defining a region of the generally planar seating surface which is uninterrupted and continuous to a full 360 degrees; and
an outer surface which extends radially outward from the outer perimeter of the generally planar seating surface, the outer surface being defined by an inner edge and a cutting edge disposed radially outward of the inner edge; and
a second surface opposite the first surface, the second surface comprising a cutting edge,
wherein the generally planar seating surface on the first surface is structured to engage a corresponding surface of an insert seat of a tool body when placed into the insert seat.
2. The round cutting insert of claim 1 , wherein the plurality of projections are formed on the generally planar seating surface adjacent to the central opening of the cutting insert.
3. The round cutting insert of claim 2 , wherein the plurality of projections each include a top surface contained in a plane that is different with respect to a plane that contains the cutting edge.
4. The round cutting insert of claim 2 , wherein the plurality of projections are evenly circumferentially spaced about the generally planar seating surface.
5. The round cutting insert of claim 1 , wherein the cutting insert is indexable and reversible.
6. The round cutting insert of claim 1 , wherein the outer surface slopes downward from the cutting edge toward the inner edge at a rake angle of between five degrees and twenty degrees.
7. The round cutting insert of claim 1 , wherein the outer surface is contained in a plane and the generally planar seating surface is contained in another plane that is non-parallel to the plane containing the outer surface.
8. The round cutting insert of claim 1 , wherein the generally planar seating surface is circular.
9. A cutting tool assembly, comprising:
a tool body including a plurality of insert-receiving pockets, each insert-receiving pocket including a sidewall and a pocket seating surface extending radially outward from a central opening of the insert-receiving pocket to an outer perimeter of the pocket seating surface, and a plurality of dimples formed in the insert-receiving pocket; and
a round cutting insert mounted in a respective insert-receiving pocket, each round cutting insert including an outer surface that terminates outwardly in a cutting edge and terminates inwardly in an inner edge; and a generally planar insert seating surface extending radially outward from a central opening of the round cutting insert to an outer perimeter of the round cutting insert, and a plurality of projections formed on the generally planar insert seating surface,
wherein the plurality of dimples do not extend to the outer perimeter of the pocket seating surface such that the outer perimeter of the pocket seating surface is uninterrupted and continuous a full 360 degrees,
wherein the plurality of projections do not extend into the outer perimeter of the generally planar insert seating surface such that the outer perimeter of the generally planar insert seating surface defines a seating face which is uninterrupted and continuous a full 360 degrees, thereby providing maximum contact between the seating face of the insert seating surface and the pocket seating surface when the cutting insert is mounted in the insert receiving pocket; and
wherein, when the cutting insert is mounted in the insert receiving pocket, the seating face of the insert seating surface extending radially outward from a central opening of the round cutting insert to an outer perimeter of the round cutting insert is in direct contact with the pocket seating surface extending radially outward from a central opening of the insert-receiving pocket to an outer perimeter of the pocket seating surface.
10. The cutting tool assembly of claim 9 , wherein the plurality of projections formed on the generally planar insert seating surface are adjacent to the central opening of the cutting insert, and wherein the plurality of dimples formed in the pocket seating surface are adjacent to the central opening of the insert-receiving pocket.
11. The cutting tool assembly of claim 9 , wherein the plurality of projections each include a top surface contained in a plane that is different with respect to a plane that contains the cutting edge.
12. The cutting tool assembly of claim 9 , wherein the plurality of projections are evenly circumferentially spaced about the generally planar insert seating surface.
13. The cutting tool assembly of claim 9 , wherein the cutting insert is indexable and reversible.
14. The cutting tool assembly of claim 9 , wherein the outer perimeter of the generally planar insert seating surface is circular, and wherein the outer perimeter of the pocket seating surface is circular.