Tool carrier with notch, cutting insert and method for making same

Patent metadata

Field	Value
Publication number	US-10245645-B1
Application number	US-201715722728-A
Country	US
Kind code	B1
Filing date	Oct 2, 2017
Priority date	Oct 2, 2017
Publication date	Apr 2, 2019
Grant date	Apr 2, 2019

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.

First claim

What is claimed is:

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, R 1 , 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.

2. 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.

3. 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.

4. The tool carrier according to claim 1 , wherein the radius, R 1 , is in a range between 0.02 mm and 0.30 mm.

5. The tool carrier according to claim 1 , wherein the inclination angle, A, is in a range between 5 degrees and 60 degrees.

6. The tool carrier according to claim 1 , wherein the notch has a total length of 0.20 mm.

7. The tool carrier according to claim 1 , further comprising a cutting tip affixed to the pocket by brazing.

8. The tool carrier according to claim 7 , wherein the cutting tip is affixed to the pocket by brazing.

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, R 1 , 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.

10. 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.

11. 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.

12. The cutting insert according to claim 9 , wherein the radius, R 1 , is in a range between 0.02 mm and 0.30 mm.

13. The cutting insert according to claim 9 , wherein the inclination angle, A, is in a range between 5 degrees and 60 degrees.

14. The cutting insert according to claim 9 , wherein the notch has a total length of 0.20 mm.

15. The cutting insert according to claim 9 , further comprising a cutting tip affixed to the pocket by brazing.

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, R 1 , 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.

17. The method of claim 16 , wherein the radius, R 1 , is in a range between 0.02 mm and 0.30 mm.

18. The method of claim 16 , wherein the inclination angle, A, is in a range between 5 degrees and 60 degrees.

Assignees

• Kennametal Inc

Inventors

• Wang Qi
• Myers Neal
• Chen Shi
• Kaufmann Igor

Classifications

• B23B2205/12

  Seats for cutting inserts · CPC title

• B23B2240/08

  Brazed connections · CPC title

• B23B27/18 Primary

  with cutting bits or tips {or cutting inserts} rigidly mounted, e.g. by brazing · CPC title

• B23B2200/0495

  rounded · CPC title

• B23B2226/125

  cubic [CBN] · CPC title