# US 7,407,348 B2 · Indexable cutting inserts and methods for producing the same > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 7,407,348 B2 - Document ID: US7407348B2 - Status: Granted - Kind: B2 - Application number: 11/142,191 - Filed: 2005-06-02 - Published: 2006-07-06 - Granted: 2008-08-05 - Earliest claimed: 2004-06-02 - Assignees: Sandvik Intellectual Property AB - Inventors: Clas Sjogren; Mikael Lindholm - Web page: https://patentgrep.com/patent/US7407348B2 ## CPC - C23C 30/005: {on hard metal substrates} - B23B 27/145: {characterised by having a special shape} - B23B 2200/3618: Fixation holes - B23B 2226/125: cubic [CBN] - B23B 2226/315: polycrystalline [PCD] - B23B 2240/08: Brazed connections - Y10T 407/1936: Apertured tool - Y10T 407/23: including tool having plural alternatively usable cutting edges - Y10T 407/26: comprising cutting edge bonded to tool shank - Y10T 407/27: comprising tool of specific chemical composition - C23C: COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL (making metal-coated products by extrusion B21C23/22; covering with metal by connecting pre-existing layers to articles, see the relevant places, e.g. B21D39/00, B23K; metallising of glass C03C; metallising mortars, concrete, artificial stone, ceramics or natural stone C04B41/00; enamelling of, or applying a vitreous layer to, metals C23D; treating metal surfaces or coating of metals by electrolysis or electrophoresis C25D; single-crystal film growth C30B; by metallising textiles D06M11/83; decorating textiles by locally metallising D06Q1/04) - B23B: TURNING; BORING (arrangements for copying or controlling B23Q) - Y10T: TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION ## Abstract A cutting insert has a body formed of a superhard material or a superhard material and a cemented carbide, and has a hole through said body and a preformed hole inlay in said hole to allow securing of the insert to a holder. The method of making same is also disclosed. ## Claims ### Claim 1 A cutting insert comprising: a base portion of a superhard material or a superhard material attached to a cemented carbide, the base portion having a first hole therethrough extending from a first surface of the base portion to a second surface of the base portion; and an inlay of a hard material attached to said base portion, said inlay having a projecting portion inserted into the first hole, a planar portion covering the second surface of the base portion, a bottom portion extending from the planar portion below a bottom plane of the insert and a second hole extending from a first surface of the projecting portion to a second surface of the bottom portion, wherein inner surfaces of the first hole have portions that are one of cylindrical or conical, and wherein inner surfaces of the second hole are generally conical. ### Claim 2 (depends on 1) The cutting insert of claim 1 wherein said base portion includes a cemented carbide and said layer of superhard material is attached to said cemented carbide by sintering. ### Claim 3 (depends on 2) The cutting insert of claim 2 wherein said inlay is attached to said base portion by brazing. ### Claim 4 (depends on 1) The cutting insert of claim 1 wherein said inlay is comprised of a cemented carbide. ### Claim 5 (depends on 1) The cutting insert of claim 1 wherein said superhard material is cubic boron nitride or polycrystalline diamond. ### Claim 6 (depends on 1) The cutting insert of claim 1 wherein said superhard layer includes a chip breaker portion. ### Claim 7 (depends on 1) The cutting insert of claim 1 wherein said bottom portion is shaped to fit into a correspondingly shaped portion in a tool holder for said insert. ### Claim 8 (depends on 1) The cutting insert of claim 1 wherein the central axis of said insert is not perpendicular to the axis of the insert. ### Claim 9 (depends on 1) The cutting insert of claim 1 wherein the second hole is a clamping hole and wherein the central axis of said inlay is not perpendicular to the axis of the clamping hole. ### Claim 10 (depends on 1) The cutting insert of claim 1 wherein the planar portion is radially coextensive with the second surface of the base portion. ### Claim 11 A method for making a cutting insert comprising: forming a layer of superhard material; optionally attaching said layer onto a superhard material or a cemented carbide substrate; forming a first hole through said layers; and attaching a preformed hole inlay within said first hole, wherein said hole inlay includes a projecting portion inserted into the first hole, a planar portion covering the second surface of the layers, a bottom portion extending from the planar portion below a bottom plane of the insert and a second hole extending from a first surface of the projecting portion to a second surface of the bottom portion, wherein inner surfaces of the first hole have portions that are one of cylindrical or conical, and wherein inner surfaces of the second hole are generally conical. ### Claim 12 (depends on 11) The method of claim 11 wherein said substrate is a cemented carbide and said layer is attached to said substrate by sintering. ### Claim 13 (depends on 11) The method of claim 11 wherein said preformed hole inlay is attached by brazing. ### Claim 14 (depends on 11) The method of claim 11 wherein said layer and said substrate are both made of a superhard material. ### Claim 15 (depends on 11) The method of claim 11 wherein said bottom portion is shaped to fit into a correspondingly shaped cavity in a tool holder for said insert. ### Claim 16 (depends on 11) The method of claim 11 wherein the planar portion is radially coextensive with the second surface of the base portion. ### Claim 17 A cutting insert comprising: a base portion having a first hole therethrough extending from a first surface of the base portion to a second surface of the base portion; and an inlay attached to said base portion, wherein the inlay includes a first side, a second side and a second hole, wherein the inlay has a projecting portion on the first side that is inserted into the first hole and extending to the first surface of the base portion, a planar portion on the second side covering the second surface of the base portion, and a bottom portion on the second side extending from the planar portion below a bottom plane of the insert, wherein the second hole extends through the inlay from a first, axial distal-most surface of the projecting portion to a second, axial distal-most surface of the bottom portion, wherein inner surfaces of the first hole have portions that are one of cylindrical or conical and inner surfaces of the second hole are generally conical, and wherein the base portion is formed of a superhard material or a superhard material attached to a cemented carbide and the inlay is formed of a hard material. ### Claim 18 (depends on 17) The cutting insert of claim 17 wherein the planar portion is radially coextensive with the second surface of the base portion. ### Claim 19 (depends on 17) The cutting insert of claim 17 wherein a central axis of said insert is not perpendicular to an axis of the insert. ### Claim 20 (depends on 17) The cutting insert of claim 17 wherein the second hole is a clamping hole and wherein a central axis of said inlay is not perpendicular to an axis of the clamping hole.