Tool holder assembly with dampening elements

Patent metadata

Field	Value
Publication number	US-9630258-B2
Application number	US-201414514826-A
Country	US
Kind code	B2
Filing date	Oct 15, 2014
Priority date	Oct 15, 2014
Publication date	Apr 25, 2017
Grant date	Apr 25, 2017

Abstract

In one aspect, tool holders employing axial sleeves and dampening elements are described herein. Tool holders described herein define a central longitudinal axis and comprise a tool holder body having a connector portion and a holder portion. The connector portion is structured to engage a rotary machine and the holder portion is disposed opposite the connector portion and has an inner diameter surface comprising a plurality of axial grooves. Tool holders described herein further comprise a tool receiver structured to receive at least a portion of a cutting tool, the tool receiver having an outer diameter surface comprising a plurality of axial grooves. The tool receiver is mounted in the holder portion so as to align the axial grooves of the inner and outer diameter surfaces and define axial sleeves filled with dampening elements.

First claim

The invention claimed is:

1. A tool holder assembly having a central longitudinal axis and comprising:
a tool holder body having a connector portion and a holder portion, the connector portion structured to engage a rotary machine and the holder portion disposed opposite the connector portion and having an inner diameter surface comprising a plurality of axial grooves; and
a tool receiver structured to receive at least a portion of a cutting tool, the tool receiver having an outer diameter surface comprising a plurality of axial grooves, wherein the tool receiver is mounted in the holder portion so as to align the axial grooves of the inner and outer diameter surfaces and define axial sleeves filled with dampening elements.

2. The tool holder assembly of claim 1 , wherein the dampening elements are not mechanically fastened to the axial grooves of the outer diameter surface or the inner diameter surface.

3. The tool holder assembly of claim 1 , wherein the axial grooves of the outer diameter surface and the dampening elements contacting the axial grooves of the outer diameter surface are parallel with the central longitudinal axis.

4. The tool holder assembly of claim 1 , wherein the axial grooves of the outer diameter surface and the dampening elements contacting the axial grooves of the outer diameter surface are not parallel to the central longitudinal axis.

5. The tool holder assembly of claim 1 , wherein the axial grooves of the outer diameter surface are substantially symmetrical to the axial grooves of the inner diameter surface.

6. The tool holder assembly of claim 5 , wherein the axial sleeves have a circular or elliptical cross-sectional profile.

7. The tool holder assembly of claim 5 , wherein the axial sleeves have a polygonal cross-sectional profile.

8. The tool holder assembly of claim 1 , wherein the dampening elements prevent contact of the tool receiver and holder portion.

9. The tool holder assembly of claim 1 , wherein the axial sleeves have a symmetrical radial arrangement around the central longitudinal axis.

10. The tool holder assembly of claim 1 , wherein the tool receiver is coupled to the tool holder body by an axial clamp screw which passes through an aperture formed in the tool receiver and threadingly engages a threaded aperture in the tool holder body.

11. The tool holder assembly of claim 1 , wherein the dampening elements are formed of an elastomeric material.

12. The tool holder assembly of claim 11 , wherein the dampening elements comprise an inner portion formed from metal.

13. A method of assembling a tool holder having a central longitudinal axis comprising:
providing a tool holder body having a connector portion and a holder portion, the connector portion structured to engage a rotary machine and the holder portion disposed opposite the connector portion and having an inner diameter surface comprising a plurality of axial grooves;
providing a tool receiver structured to receive at least a portion of a cutting tool, the tool receiver having an outer diameter surface comprising a plurality of axial grooves;
mounting the tool receiver in the holder portion so as to align the axial grooves of the inner and outer diameter surfaces and define axial sleeves, wherein the axial sleeves are filled with dampening elements.

14. The method of claim 13 , wherein the axial sleeves are filled with the dampening elements by positioning the dampening elements in the axial grooves of the outer diameter surface prior to mounting the tool receiver in the holder portion.

15. The method of claim 14 , wherein the axial grooves of the outer diameter and associated dampening elements are parallel to the central longitudinal axis.

16. The method of claim 14 , wherein the axial grooves of the outer diameter and associated dampening elements are not parallel to the central longitudinal axis.

17. The method of claim 14 , wherein the dampening elements are not mechanically fastened to the axial grooves of the outer diameter surface.

18. The method of claim 13 , wherein the axial sleeves are filled with the dampening elements by positioning the dampening elements in the axial grooves of the inner diameter surface prior to mounting the tool receiver in the holder portion.

19. The method of claim 13 , wherein the axial grooves of the outer diameter surface are substantially symmetrical to the axial grooves of the inner diameter surface.

20. The method of claim 19 , wherein the axial sleeves have a circular, elliptical or polygonal cross-sectional profile.

21. A tool holder assembly having a central longitudinal axis and comprising:
a tool holder body having a connector portion and a holder portion, the connector portion structured to engage a rotary machine and the holder portion disposed opposite the connector portion and having an inner diameter surface comprising a plurality of axial grooves; and
a tool receiver structured to receive at least a portion of a cutting tool, the tool receiver having an outer diameter surface comprising a plurality of axial grooves, wherein the tool receiver is mounted in the holder portion so as to align the axial grooves of the inner and outer diameter surfaces and define axial sleeves filled with dampening elements,
wherein the axial grooves of the outer diameter surface and the dampening elements contacting the axial grooves of the outer diameter surface are not parallel to the central longitudinal axis; and
wherein the axial grooves of the outer diameter surface and the dampening elements contacting the axial grooves of the outer diameter surface are arranged generally helically about the central longitudinal axis.

Assignees

• Kennametal Inc
• Kennametal Inc

Inventors

• Mccormick Michael R
• Filho Ruy Frota De Souza

Classifications

• B23B31/107

  Retention by laterally-acting detents, e.g. pins, screws, wedges; Retention by loose elements, e.g. balls · CPC title

• Y10T409/304312

  with means to dampen vibration · CPC title

• Y10T408/73

  Tool or tool-support with torque-applying spline · CPC title

• B23B2226/33

  Elastomers, e.g. rubber · CPC title

• B23B31/1075

  Retention by screws · CPC title