# US 10,245,645 B1 · Tool carrier with notch, cutting insert and method for making same > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,245,645 B1 - Document ID: US10245645B1 - Status: Granted - Kind: B1 - Application number: 15/722,728 - Filed: 2017-10-02 - Published: 2019-04-04 - Granted: 2019-04-02 - Earliest claimed: 2017-10-02 - Assignees: Kennametal Inc. - Applicants: Kennametal Inc. - Inventors: Qi Wang; Neal Myers; Shi Chen; Igor Kaufmann - Web page: https://patentgrep.com/patent/US10245645B1 ## CPC - B23B 27/18: with cutting bits or tips {or cutting inserts} rigidly mounted, e.g. by brazing - B23B 27/145: {characterised by having a special shape} - B23B 2200/0447: Parallelogram - B23B 2200/0495: rounded - B23B 2205/12: Seats for cutting inserts - B23B 2226/125: cubic [CBN] - B23B 2226/315: polycrystalline [PCD] - B23B 2240/08: Brazed connections - B23B: TURNING; BORING (arrangements for copying or controlling B23Q) ## Abstract A cutting insert includes a tool carrier having a body with a pocket, and a cutting tip affixed to the pocket by brazing. The pocket is defined by a vertical back wall and a horizontal support surface. A notch is formed at the intersection between the vertical back wall and the horizontal support surface. The notch has a non-planar first portion proximate the vertical back wall and formed with a radius, R1, and a planar second portion extending between the first portion and the horizontal support surface and formed at an inclination angle with respect to a plane parallel to the horizontal support surface of the pocket. The design of the notch significantly reduces thermal stress and eliminates the formation of cracks in the pocket of the tool carrier when using an injection molding process to form the tool carrier. ## Claims ### Claim 1 A tool carrier for a cutting insert, the tool carrier comprising: a body; a pocket formed in the body for accommodating a cutting tip of a cutting insert, the pocket defined by a vertical back wall and a horizontal support surface; and a notch formed at an intersection between the vertical back wall and the horizontal support surface of the pocket, wherein the notch has a non-planar first portion proximate the vertical back wall and formed with a radius, R1, and a planar second portion extending between the first portion and the horizontal support surface and formed at an inclination angle, A, with respect to a plane parallel to the horizontal support surface of the pocket. ### Claim 2 (depends on 1) The tool carrier according to claim 1, wherein the planar section portion has a length that is in a range between 0.20 and 0.90 times a total length of the notch. ### Claim 3 (depends on 1) The tool carrier according to claim 1, wherein the planar second portion of the notch has a length that is 0.75 times a total length of the notch. ### Claim 4 (depends on 1) The tool carrier according to claim 1, wherein the radius, R1, is in a range between 0.02 mm and 0.30 mm. ### Claim 5 (depends on 1) The tool carrier according to claim 1, wherein the inclination angle, A, is in a range between 5 degrees and 60 degrees. ### Claim 6 (depends on 1) The tool carrier according to claim 1, wherein the notch has a total length of 0.20 mm. ### Claim 7 (depends on 1) The tool carrier according to claim 1, further comprising a cutting tip affixed to the pocket by brazing. ### Claim 8 (depends on 7) The tool carrier according to claim 7, wherein the cutting tip is affixed to the pocket by brazing. ### Claim 9 A cutting insert, comprising: a cutting tip; and a tool carrier comprising: a body; a pocket formed in the body for accommodating the cutting tip, the pocket defined by a vertical back wall and a horizontal support surface; and a notch formed at an intersection between the vertical back wall and the horizontal support surface of the pocket, wherein the notch has a non-planar first portion proximate the vertical back wall and formed with a radius, R1, and a planar second portion extending between the first portion and the horizontal support surface and formed at an inclination angle, A, with respect to a plane parallel to the horizontal support surface of the pocket. ### Claim 10 (depends on 9) The cutting insert according to claim 9, wherein the planar section portion has a length that is in a range between 0.20 and 0.90 times a total length of the notch. ### Claim 11 (depends on 9) The cutting insert according to claim 9, wherein the planar second portion of the notch has a length that is 0.75 times a total length of the notch. ### Claim 12 (depends on 9) The cutting insert according to claim 9, wherein the radius, R1, is in a range between 0.02 mm and 0.30 mm. ### Claim 13 (depends on 9) The cutting insert according to claim 9, wherein the inclination angle, A, is in a range between 5 degrees and 60 degrees. ### Claim 14 (depends on 9) The cutting insert according to claim 9, wherein the notch has a total length of 0.20 mm. ### Claim 15 (depends on 9) The cutting insert according to claim 9, further comprising a cutting tip affixed to the pocket by brazing. ### Claim 16 A method for manufacturing a tool carrier for a cutting insert by using an injection molding process, the tool carrier comprising a body and a pocket formed in the body for accommodating a cutting tip of a cutting insert, the method comprising affixing the cutting tip to the pocket of a tool carrier by brazing, wherein the pocket includes a vertical back wall, a horizontal support surface, and a notch formed at an intersection between the vertical back wall and the horizontal support surface of the pocket for accommodating brazing material, and wherein the notch has a non-planar first portion proximate the vertical back wall and formed with a radius, R1, and a planar second portion extending between the first portion and the horizontal support surface and formed at an inclination angle with respect to a plane parallel to the horizontal support surface of the pocket, and wherein the notch eliminates formation of cracks in the tool carrier during the injection molding process. ### Claim 17 (depends on 16) The method of claim 16, wherein the radius, R1, is in a range between 0.02 mm and 0.30 mm. ### Claim 18 (depends on 16) The method of claim 16, wherein the inclination angle, A, is in a range between 5 degrees and 60 degrees.