Claims
- 1. A cutting tool insert, comprising an insert body having upper and lower surfaces with an opening passing through the body in an axial direction from said upper surface to said lower surface, said insert body including a plurality of radially outwardly extending projections located at a periphery of said insert body between said upper and lower surfaces, each of said projections having a pair of adjacent cutting edges each of which is spaced circumferentially from the other by a recess extending inwardly toward the opening, said cutting edges and said recesses each extending at least generally in the axial direction.
- 2. The insert of claim 1, wherein each of said pair of cutting edges comprises a front cutting edge and a rear cutting edge, said front and rear cutting edges being arranged in alternating sequence about the circumference of the insert with one of said front cutting edges from one projection and one of said rear cutting edges on an adjacent projection together comprising a cutting side of the insert, whereby said cutting side has two cutting edges arranged to cut material simultaneously.
- 3. The insert of claim 2, wherein said front cutting edges are located farther from said opening than said rear cutting edges.
- 4. The insert of claim 2, wherein said projections are separated by recesses that extend farther inwardly toward said opening than the recesses that separate said front and rear cutting edges from each other on each projection.
- 5. The insert of claim 1, wherein the body has a generally pentagonal shape.
- 6. The insert of claim 1, wherein each of said projections terminates in a pair of generally flat surfaces inclined relative to one another.
- 7. A cutting tool, comprising:
a plurality of cutting inserts each having upper and lower surfaces with an opening passing through the insert from said upper surface to said lower surface, each said insert including a plurality of radially outwardly extending projections located at a periphery of said insert between said upper and lower surfaces, each of said projections having front and rear cutting edges spaced circumferentially from each other by a recess extending inwardly toward the opening; a cutter body having front and back sides and an outer periphery having a plurality of pockets, each of said pockets being defined at least in part by a side wall and a recessed surface having a bore; and a plurality of fasteners each extending through one of said openings and said bores, thereby securing each said insert within its associated pocket; each of said inserts abutting said side wall of said pocket at a location adjacent said front cutting edges on two of said projections and being spaced from said side wall at one or more locations adjacent said rear cutting edges of said two projections.
- 8. The cutting tool of claim 7, wherein said insert abuts said side wall only at two locations.
- 9. The cutting tool of claim 7, wherein said plurality of pockets comprises all of the pockets on said cutter body at its periphery and wherein said cutting tool includes one of said inserts for each of said pockets.
- 10. The cutting tool of claim 7, wherein said front and rear cutting edges are arranged in alternating sequence about the circumference of the insert with one of said front cutting edges from one projection and one of said rear cutting edges on an adjacent projection together comprising a cutting side of the insert, whereby said cutting side has two cutting edges arranged to cut material simultaneously.
- 11. The cutting tool of claim 10, wherein, for each cutting side of the insert, said front cutting edge has a radial rake angle A and said rear cutting edge has a radial rake angle B that is less negative than rake angle A.
- 12. A cutting tool, comprising:
a plurality of cutting inserts each having upper and lower surfaces with an opening passing through the body from said upper surface to said lower surface, said inserts further having a plurality of cutting sides located at a periphery of said insert between said upper and lower surfaces, said cutting sides each including a front cutting tooth and a rear cutting tooth; and a cutter body having front and back sides and an outer periphery having a plurality of pockets, each of said pockets being defined at least in part by a recessed surface and side wall which is complementary in shape to said inserts such that each said pocket can receive one of said inserts, said recessed surface of each pocket having a bore that aligns with said opening of said insert to receive a fastener through said bore and said opening when said insert is positioned within said pocket; said side walls of said pockets each having a conformation wherein, when each said insert is attached by a fastener within its associated pocket, two of said front teeth of said insert abut said side wall of said pocket with at least one interposed rear tooth being spaced from said side wall.
- 13. The cutting tool of claim 12, wherein only said two front teeth abut said side wall of said pocket.
- 14. The cutting tool of claim 12, wherein said plurality of pockets comprises all of the pockets on said cutter body at its periphery and wherein said cutting tool includes one of said inserts for each of said pockets.
- 15. The cutting tool of claim 12, wherein said front and rear teeth are arranged in alternating sequence about the circumference of the insert with one of said front teeth from one projection and one of said rear teeth on an adjacent projection together comprising a cutting side of the insert, whereby said cutting side has two teeth arranged to cut material simultaneously.
- 16. The cutting tool of claim 15, wherein, for each cutting side of the insert, said front tooth has a radial rake angle A and said rear tooth has a radial rake angle B that is less negative than rake angle A.
- 17. The cutting tool of claim 16, wherein the rake angles are dependent on the height of said front teeth.
- 18. The cutting tool of claim 12, wherein each insert has a generally pentagonal shape.
CROSS-REFERENCE TO RELATED APPLICATION
[0001] This application claims the priority of U.S. Application No. 60/474,112, filed May 29, 2003, the complete disclosure of which is hereby incorporated by reference.
Provisional Applications (1)
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Number |
Date |
Country |
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60474112 |
May 2003 |
US |