Tool holder and clamping system

Patent metadata

Field	Value
Publication number	US-10967437-B2
Application number	US-201815944265-A
Country	US
Kind code	B2
Filing date	Apr 3, 2018
Priority date	Dec 27, 2011
Publication date	Apr 6, 2021
Grant date	Apr 6, 2021

Abstract

A tool holder with a main part, a deformable receiving portion for clamping a tool, and at least one blocking element which is designed to engage into a corresponding counter element on the tool in order to prevent the tool from moving axially out of the tool holder. The at least one blocking element is integrally formed with the receiving portion. A clamping system having such a tool holder and a method for producing a receiving portion for such a tool holder are also described.

First claim

The invention claimed is:

1. A tool holder comprising:
a main part;
a deformable receiving portion for clamping a tool, the deformable receiving portion having a back region relative to a receiving opening in the main part, the back region extending to an end of the deformable receiving portion and having a larger inner diameter compared to an inner diameter of a front region of the deformable receiving portion; and
at least one blocking element formed integrally with the deformable receiving portion, the at least one blocking element disposed in the back region as a projection extending along an interior surface of the back region;
wherein the at least one blocking element axially extends over a partial inner circumference of the back region of the deformable receiving portion such that the at least one blocking element does not extend along an entire interior surface of the back region from a first end to a second end of the back region, the at least one blocking element configured and arranged for engaging with a corresponding counter element disposed on a shank of the tool to form a connection between the tool and the tool holder thereby preventing axial slippage of the tool from the deformable receiving portion, wherein interior surfaces of the back region radially adjacent the at least one blocking element do not contact exterior surfaces of the tool when the tool is engaged within the tool holder.

2. The tool holder according to claim 1 , wherein the deformable receiving portion is an expansion sleeve deployed in the receiving opening in the main part, the expansion sleeve configured and arranged to receive external pressure from hydraulic fluid.

3. The tool holder according to claim 1 , wherein the deformable receiving portion is a contracting chuck formed integrally with the main part.

4. The tool holder according to claim 3 , further comprising a reducing sleeve deployed within the contracting chuck.

5. The tool holder according to claim 1 , wherein the deformable receiving portion is a collet chuck deployed within the receiving opening of the main part, the collet chuck deformable by a clamping element.

6. The tool holder according to claim 1 , wherein the deformable receiving portion is a clamping region formed on a front part of the main part, the clamping region deformable by a clamping nut on the main part and rotatable by a roller bearing.

7. The tool holder according to claim 1 , wherein the at least one blocking element has a semicircular or partially circular cross section.

8. The tool holder according to claim 1 , wherein the deformable receiving portion is made from a material selected from the group consisting of ceramic, metal, and mixtures thereof.

9. The tool holder according to claim 1 , wherein the deformable receiving portion is made of a metal produced from a metal powder using laser sintering.

10. The tool holder according to claim 1 , further comprising additional blocking elements set apart from one another at equal angles in a peripheral direction on at least a partial circumference of the interior surface of the back region of the deformable receiving portion.

11. A clamping system comprising a tool and the tool holder of claim 1 , in which the at least one blocking element is engaged with the corresponding counter element of the tool forming a connection that prevents axial slippage of the tool from the deformable receiving portion.

12. The clamping system according to claim 11 , wherein the corresponding counter element is disposed on an exterior surface of the shank of the tool.

13. A tool holder comprising:
a main part;
a deformable receiving portion for clamping a tool, the deformable receiving portion having a back region relative to a receiving opening in the main part, the back region extending to an end of the deformable receiving portion and having a larger inner diameter compared to an inner diameter of a front region of the deformable receiving portion; and
at least two blocking elements formed integrally with the deformable receiving portion, the at least two blocking elements disposed axially extending along an interior surface of the back region;
wherein the at least two blocking elements extend over a partial inner circumference of the back region of the deformable receiving portion such that the at least two blocking elements do not extend along an entire interior surface of the back region from a first end to a second end, the at least two blocking elements configured and arranged for engaging with corresponding counter elements disposed on a shank of the tool to form a connection between the tool and the tool holder thereby preventing axial slippage of the tool from the deformable receiving portion, wherein interior surfaces of the back region radially adjacent the at least two blocking elements and disposed between the at least two blocking elements do not contact exterior surfaces of the tool when the tool is engaged within the tool holder.

14. The tool holder according to claim 13 , wherein each of the at least two blocking elements has a semicircular or partially circular cross section.

15. The tool holder according to claim 13 , wherein the deformable receiving portion is made from ceramic, metal, metal produced from a metal powder using laser sintering, or mixtures thereof.

16. A clamping system comprising a tool and the tool holder of claim 13 , in which each of the at least two blocking elements is engaged with the corresponding counter element of the tool forming a connection that prevents axial slippage of the tool from the deformable receiving portion.

17. The tool holder according to claim 13 , wherein the deformable receiving portion is an expansion sleeve deployed in the receiving opening in the main part, the expansion sleeve configured and arranged to receive external pressure from hydraulic fluid.

18. The tool holder according to claim 13 , wherein the deformable receiving portion is a contracting chuck formed integrally with the main part.

19. The tool holder according to claim 13 , wherein the deformable receiving portion is a collet chuck deployed within the receiving opening of the main part, the collet chuck deformable by a clamping element.

20. The tool holder according to claim 13 , wherein the deformable receiving portion is a clamping region formed on a front part of the main part, the clamping region deformable by a clamping nut on the main part and rotatable by a roller bearing.

Assignees

• Franz Haimer Maschb Kg

Inventors

• Haimer Franz

Classifications

• B23B31/005 Primary

  Cylindrical shanks of tools · CPC title

• B23B31/202

  Details of the jaws · CPC title

• B23B31/20125 Primary

  Axially fixed cam, moving jaws · CPC title

• B23B31/107

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

• B23B31/02

  Chucks · CPC title