Damped boring bar

Patent metadata

Field	Value
Publication number	US-10857599-B2
Application number	US-201916248518-A
Country	US
Kind code	B2
Filing date	Jan 15, 2019
Priority date	Jan 15, 2019
Publication date	Dec 8, 2020
Grant date	Dec 8, 2020

Abstract

A tool for a boring machine includes an elongated elongated body extending longitudinally from a proximal end to a distal end, the distal end being shaped to receive a cutting tip, and a cavity inside the body. The tool includes a lattice provided within the cavity and a powder provided in the cavity with the lattice.

First claim

What is claimed is:

1. A tool for a boring machine, comprising:
a body extending longitudinally from a proximal end to a distal end, the distal end being shaped to receive a cutting tip;
a first cavity inside the body;
a lattice provided within the first cavity;
a second cavity inside the body;
an insert at a proximal portion of the second cavity, the insert tapering toward the distal end of the body, the insert and the lattice overlapping each other in a longitudinal direction of the body; and
a powder provided in the first cavity with the lattice.

2. The tool according to claim 1 , wherein the first cavity has a tapered shape.

3. The tool according to claim 1 , wherein the lattice extends from a proximal end of the first cavity to a distal end of the first cavity.

4. The tool according to claim 3 , wherein the body is monolithically formed with the lattice.

5. The tool according to claim 1 , wherein the powder substantially fills the first cavity.

6. The tool according to claim 5 , wherein the first cavity has a cross-sectional area that increases from the proximal end of the body toward the distal end of the body.

7. The tool according to claim 1 , wherein the first cavity is completely enclosed by the body.

8. The tool according to claim 1 , wherein the first cavity is separate from the second cavity.

9. A boring bar, comprising:
a monolithic body formed by additive manufacturing and extending longitudinally from a proximal end to a distal end, the distal end shaped to receive a cutting tip;
a first cavity and a second cavity inside the body, the second cavity overlapping with the first cavity and extending more proximal than the first cavity;
a lattice provided within the cavity, the lattice formed by additive manufacturing; and
an inner surface of the body completely enclosing the cavity.

10. The boring bar according to claim 9 , wherein the lattice is monolithically formed with the body.

11. The boring bar according to claim 9 , wherein the cavity is located at the distal end of the boring bar.

12. The boring bar according to claim 11 , wherein the cavity has a proximal end and a distal end, the distal end having a larger cross-sectional area as compared to a cross-sectional area of the proximal end of the cavity.

13. The boring bar according to claim 9 , wherein a powder is enclosed within the cavity.

14. The boring bar according to claim 13 , wherein the powder is an unsintered metal powder.

15. The boring bar of claim 9 , further including an insert within the body, the insert having a tapered distal end portion positioned within a distal end portion of the body.

16. The boring bar of claim 9 , further including an insert within the body, wherein the lattice extends adjacent to a distal end of the insert.

17. A boring bar, comprising:
a monolithic body extending longitudinally from a proximal end to a distal end, the proximal end shaped to be secured by a tool holder, the distal end shaped to secure a cutting tool;
a bore extending from the proximal end of the body;
a completely enclosed cavity within the body at the distal end of the body;
a wall that separates the bore from the cavity;
a lattice disposed within the cavity; and
a powder enclosed within the cavity, wherein the body, wall, lattice, and powder are all formed by additive manufacturing.

18. The boring bar according to claim 17 , wherein the wall is inclined with respect to a longitudinal axis of the body.

19. The boring bar according to claim 17 , wherein the lattice engages walls of the cavity.

Assignees

• Caterpillar Inc
• Caterpiller Inc

Inventors

• Marchione Thierry A
• Martin Kevin L
• Bhapkar Rohit A

Classifications

• B33Y80/00

  Products made by additive manufacturing · CPC title

• B23B27/007

  for internal turning (boring bars B23B29/02, boring heads B23B29/03; milling cutters B23C5/00; reamers B23D77/00) · CPC title

• B23B29/022 Primary

  with vibration reducing means · CPC title

• B23B27/002 Primary

  with vibration damping means · CPC title