Damped boring bar
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.
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.