Metal cutting inserts having superhard abrasive bodies and methods of making same

Patent 5676496 Issued on October 14, 1997. Estimated Expiration Date:

September 30, 2016. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.

Abstract Claims Description Full Text

Patent References

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Inventors

Assignee

Application

No. 723810 filed on 09/30/1996

US Classes:

407/118, COMPRISING CUTTING EDGE BONDED TO TOOL SHANK51/293, MISCELLANEOUS407/119, COMPRISING TOOL OF SPECIFIC CHEMICAL COMPOSITION408/144, TOOL OF SPECIFIC DIVERSE MATERIAL408/145TOOL HAVING CRYSTALLINE CUTTING EDGE

Examiners

Primary: Howell, Daniel W.
Assistant: Tsai, Henry W. H.

Attorney, Agent or Firm

Burns, Doane, Swecker & Mathis, L.L.P.

Foreign Patent References

0019461 EP 11/13/1980
4336903 JP 11/13/1992
2037629 GB 07/13/1980

International Class

B23B 027/14

Abstract

A metal cutting insert comprises a carbide substrate, and at least one body of superhard abrasive material, such as PCD or PCBN, bonded to an edge surface of the substrate and extending from one side surface to the other side surface of the substrate. There can be a plurality of superhard bodies disposed at respective corners of the substrate. The abrasive material is applied to the substrate in a container and then sintered and simultaneously bonded to the substrate by an elevated pressure/temperature step. Inserts can be made in rod form (i.e., in one piece) and then the rod can be transversely sliced into thin inserts; or the inserts can be made in separate pieces, with or without separators within the container.