Lightweight cutting tool

Patent metadata

Field	Value
Publication number	US-RE50607-E
Application number	US-202218083299-A
Country	US
Kind code	E1
Filing date	Dec 16, 2022
Priority date	Aug 30, 2019
Publication date	Sep 30, 2025
Grant date	Sep 30, 2025

Abstract

A lightweight cutting tool, such as a reamer, includes a front cutting body, a front cutting ring, a center tube, a rear cutting ring and a rear machine connection member. An arm assembly of the front and rear cutting heads includes one or more leading arms, one or more trailing arms and a cutting head supported by the leading and trailing arms. The leading arms and the trailing arms curve in opposite directions. To reduce weight and moment of inertia of the reamer, a cross-sectional area of the leading arms and the trailing arms is largest proximate the sleeve member and is smallest proximate the cutting head. In addition, the front cutting body, the front and rear cutting rings and the center tube may be made by additive manufacturing. Fluid can be transported entirely through the reamer to the cutting insert/workpiece interface and the guide pad/workpiece interface.

First claim

What is claimed is:

1. A cutting tool, comprising: a rear machine connection member; a center tube having a front end and a rear end; at least one cutting ring secured to the center tube, the at least one cutting ring including a sleeve member and one or more arm assemblies, each arm assembly including one or more leading arms extending radially outwardly from the sleeve member, one or more trailing arms extending radially outwardly from the sleeve member, and a cutting head supported by the one or more leading arms and the one or more trailing arms, wherein a cross-sectional area of the one or more leading arms is largest proximate the sleeve member and is smallest proximate the cutting head to reduce weight and moment of inertia of the cutting tool, and wherein a cross-sectional area of the one or more trailing arms is largest proximate the sleeve member and is smallest proximate the cutting head to reduce weight and moment of inertia of the cutting tool.

2. The cutting tool of claim 1 , further comprising a front cutting ring proximate the front end of the center tube, and a rear cutting ring proximate the rear end of the center tube.

3. The cutting tool of claim 1 , wherein each of the one or more leading arms and the one or more trailing arms have a non-circular cross-sectional shape.

4. The cutting tool of claim 3 , wherein each of the one or more leading arms and the one or more trailing arms have a kidney-shaped cross section.

5. The cutting tool of claim 1 , wherein each of the one or more leading arms and each of the one or more trailing arms have a hollow interior portion defining a fluid channel capable of transporting fluid from the sleeve member to a cutting insert/workpiece interface.

6. The cutting tool of claim 5 , wherein the fluid channel has a cross-sectional shape that varies along a length of each of the one or more leading arms and each of the one or more trailing arms.

7. The cutting tool of claim 1 , wherein the one or more leading arms and the one or more trailing arms are formed with a helix angle, HA, with respect to a center, rotational axis, RA, of the cutting tool.

8. The cutting tool of claim 1 , wherein the one or more leading arms extend radially outward from the sleeve member with a radius of curvature, R L , and wherein the one or more trailing arms extend radially outward from the sleeve member with a radius of curvature, R T .

9. The cutting tool of claim 8 , wherein the trailing arms curve in the same direction as a direction of rotation, R, of the cutting tool, and the one or more leading arms curve in an opposite direction as a direction of rotation, R, of the cutting tool.

10. The cutting tool of claim 1 , wherein the cutting head comprises an insert pocket for mounting a cutting insert therein.

11. The cutting tool of claim 1 , wherein the cutting head comprises a guide pad pocket for mounting a guide pad therein.

12. The cutting tool of claim 1 , wherein the center tube comprises an outer wall and an inner wall forming a cavity therebetween.

13. The cutting tool of claim 12 , further comprising one or more ribs extending between the outer wall and the inner wall.

14. The cutting tool of claim 13 , wherein the one or more ribs define a helical coolant channel within the cavity.

15. The cutting tool of claim 1 , further comprising at least one support member for supporting one of the one or more leading arms and the one or more trailing arms.

16. The cutting tool of claim 1 , wherein the cutting tool comprises is a reamer.

17. A cutting tool, comprising: a rear machine connection member; a center tube having a front end and a rear end; at least one cutting ring secured to the center tube, the at least one cutting ring including a sleeve member and one or more arm assemblies, each arm assembly including one or more leading arms extending radially outwardly from the sleeve member, one or more trailing arms extending radially outwardly from the sleeve member, and a cutting head supported by the one or more leading arms and the one or more trailing arms, wherein the one or more leading arms extend radially outward from the sleeve member with a radius of curvature, RL, wherein the one or more trailing arms extend radially outward from the sleeve member with a radius of curvature, RT, and wherein the one or more leading arms curve in an opposite vertical and horizontal direction than the one or more trailing arms.

18. The cutting tool of claim 17 , further comprising a front cutting ring proximate the front end of the center tube, and a rear cutting ring proximate the rear end of the center tube.

19. The cutting tool of claim 17 , wherein a cross-sectional area of the one or more leading arms is largest proximate the sleeve member and is smallest proximate the cutting head to reduce weight and moment of inertia of the cutting tool, and wherein a cross-sectional area of the one or more trailing arms is largest proximate the sleeve member and is smallest proximate the cutting head to reduce weight and moment of inertia of the cutting tool.

20. The cutting tool of claim 17 , wherein each of the one or more leading arms and the one or more trailing arms have a non-circular cross-sectional shape.

21. The cutting tool of claim 20 , wherein each of the one or more leading arms and the one or more trailing arms have a kidney-shaped cross section.

22. The cutting tool of claim 17 , wherein each of the one or more leading arms and each of the one or more trailing arms have a hollow interior portion defining a fluid channel capable of transporting fluid from the sleeve member to a cutting insert/workpiece interface.

23. The cutting tool of claim 22 , wherein the fluid channel has a cross-sectional shape that varies along a length of each of the one or more leading arms and each of the one or more trailing arms.

24. The cutting tool of claim 17 , wherein the cutting head comprises an insert pocket for mounting a cutting insert therein.

25. The cutting tool of claim 17 , wherein the center tube comprises an outer wall and an inner wall forming a cavity therebetween.

26. The cutting tool of claim 25 , further comprising one or more ribs extending between the outer wall and the inner wall.

27. The cutting tool of claim 26 , wherein the one or more ribs are helical define a helical coolant channel within the cavity.

28. The cutting tool of claim 17 , further comprising at least one support member for supporting one of the one or more leading arms and the one or more trailing arms.

29. The cutting tool of claim 17 , wherein the cutting tool comprises is a reamer.

30. A cutting tool comprising:
a rear machine connection member; a center tube having a front end and a rear end opposite the front end along a central axis; a front cutting ring attached to the center tube proximate the front end of the center tube; and a rear cutting ring attached to the center tube proximate the rear end of the center tube and separated from the front cutting ring by a gap along the central axis, wherein the front cutting ring and the rear cutting ring each comprise one or more radially outwardly extending arm assemblies, and wherein the front cutting ring and the rear cutting ring each comprise a sleeve member and each of the one or more arm assemblies comprise:
one or more leading arms extending radially outward from the sleeve memb

Assignees

• Kennametal Inc

Inventors

• Semnisky Logan M
• Bookheimer Alan J
• De Souza Filho Ruy Frota
• Penkert Werner
• Grillenberger Ingo
• Schmid Dominik

Classifications

• B23C5/28

  Features relating to lubricating or cooling · CPC title

• B23D2277/46

  Guiding pads · CPC title

• B23D77/02 Primary

  Reamers with inserted cutting edges · CPC title

• Y02P10/25

  Process efficiency · CPC title

• B22F10/00

  Additive manufacturing of workpieces or articles from metallic powder (apparatus or devices therefor B22F12/00) · CPC title