TOOL HOLDER

Abstract

The disclosure relates to a tool holder having a tool portion and a tool interface portion, wherein the tool interface portion has a lateral surface area which is of rotationally symmetrical design and extends over a predetermined axial length and wherein the tool interface portion has sections with non-round cross section.

Claims

1. A tool holder having a tool portion and a tool interface portion, wherein the tool interface portion has a lateral surface area which is of rotationally symmetrical design and extends over a predetermined axial length, wherein the tool interface portion has sections with non-round cross section.

2. The tool holder according to claim 1, wherein the sections with non-round cross section are formed by depressions arranged in the lateral surface area.

3. The tool holder according to claim 1, wherein depressions arranged in a section plane which is perpendicular to the axis of rotation are positioned at equal angular distances to each other.

4. The tool holder according to claim 3, wherein the depressions have the same arc length in each axial plane.

5. The tool holder according to claim 1, wherein the axial extension, the radial depth, and the arc length are predefined for a depression.

6. The tool holder according to claim 1, wherein depressions of different shape and/or extension are arranged on the lateral surface.

7. The tool holder according to claim 6, wherein depressions of different shape and/or extension are arranged in a ring area.

8. The tool holder according to claim 1, wherein depressions extend over the entire axial length of the tool interface portion.

9. The tool holder according to claim 8, wherein the depressions have a different radial depth over their axial progression.

10. The tool holder according to claim 1, wherein axially extended depressions run at an angle to the axis of rotation of the tool holder.

11. The tool holder according to claim 1, wherein the number of depressions is variable in relation to the circumference.

12. The tool holder according to claim 11, wherein the number of depressions is between 3 and 10.

13. The tool holder according to claim 1, wherein the number of the optional axial relieves is variable.

Description

DRAWINGS

[0025] The drawings described herein are for illustrative purposes only of selected embodiments and not all possible implementations, and are not intended to limit the scope of the present disclosure.

[0026] Further advantages and features of the disclosure will become apparent from the following description with reference to the attached drawings wherein it is shown by

[0027] FIG. 1 a representation of a tool holder according to the HSK system in a further development according to the disclosure;

[0028] FIG. 2 a representation of a tool holder according to the SK system in a further development according to the disclosure.

DETAILED DESCRIPTION

[0029] Example embodiments will now be described more fully with reference to the accompanying drawings.

[0030] FIG. 1 shows a conventional tool holder 1 according to the HKS system having an interface portion 2 and a tool holder portion 3. The tool holder portion 3 is only indicated up to the cutting line and is otherwise standard.

[0031] In the usual manner, the inside progressions show the edges 4 for the engagement behind and drawing the tool holder into the tool mount of a machine tool and the like.

[0032] All these details are standard.

[0033] FIG. 2 shows in a corresponding manner the tool holder 10 according to the SK system having the interface portion 11 and the holder portion 12.

[0034] The representations on the right are subviews of the interface portions 2 and 11, respectively.

[0035] They show that, in deviation from the circular design, depressions 5 and 6 respectively 13, 14 and 15 are formed in the lateral surface area. This gives the individual axial steps a non-round cross-section that can be produced by a non-round turning process for example.

[0036] This non-round cross section has the effect that contact-free areas are formed in the depressions between the tool interface and the tool holder which allow a sufficient flow of material under load.

[0037] Reference numbers 7 or 16 indicate axially extending radial relief grooves which reduce the contact area between the tool and the tool interface to a necessary minimum. In this way, it can be achieved that due to the lower friction during the draw-in process, a higher clamping force can be brought to the face contact, which has a clear effect on the rigidity of the tool without losing compatibility with the standard, especially in the case of the HSK interface.

[0038] The embodiments described are for illustrative purposes only and are not limiting.

[0039] Notch effects can be avoided by selecting suitable non-round shapes. The number of depressions is as variable as the respective depth.