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AssigneesSmith International, Inc., Sandvik Aktiebolag
InventorsPeter Littecke, Scott M. Packer, Ronald B. Crockett, Ghanshyam Rai
Estimating the term…
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.
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;
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.
Dependencies are inferred from the claim text.