Claims
- 1. A metal cutting insert comprising a substrate having first and second side surfaces interconnected by an edge surface, at least one groove disposed in the edge surface and formed by a wall which intersects the edge surface at two spaced locations; the wall being continuously curved from one of the locations to the other, and a body of superhard abrasive material sintered in situ in the groove whereby the abrasive material forms a directly sintered bond with the wall of the groove, the directly sintered bond extending from the first side surface to the second side surface.
- 2. The insert according to claim 1, wherein the first and second side surfaces are of polygonal shape such that the edge surface comprises a plurality of segments interconnected to form corners of the insert, the body disposed at least at one of the corners.
- 3. The insert according to claim 2, wherein there is a body at each of the corners.
- 4. The insert according to claim 1, wherein there is provided a plurality of the bodies, the bodies arranged in spaced relationship around the edge surface.
- 5. The insert according to claim 1, wherein the first and second side surfaces are round.
- 6. The insert according to claim 1, wherein the substrate comprises a carbide.
- 7. The insert according to claim 6, wherein the superhard abrasive material is selected from a group comprising PCD and PCBN.
- 8. The insert according to claim 1, wherein said insert is coated with a PVD coating.
- 9. The insert according to claim 1, wherein said insert is coated with a CVD coating.
- 10. A blank for use in making a cutting insert, comprising a substrate having first and second side surfaces interconnected by an edge surface, at least one groove formed in the edge surface by a wall which intersects the edge surface at two spaced locations, then being continuously curved from one location to the other, and a body of superhard abrasive material sintered in situ in the groove whereby the abrasive material forms a directly sintered bond with the wall of the groove, the directly sintered bond extending from the first side surface to the second side surface, the abrasive material disposed entirely within the confines of the groove.
RELATED INVENTION
This application is a Continuation of application Ser. No. 08/446,490, filed May 22, 1995, now abandoned.
US Referenced Citations (11)
Foreign Referenced Citations (3)
Number |
Date |
Country |
0019461 |
Nov 1980 |
EPX |
4336903 |
Nov 1992 |
JPX |
2037629 |
Jul 1980 |
GBX |
Continuations (1)
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Number |
Date |
Country |
Parent |
446490 |
May 1995 |
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