METHOD AND DEVICE FOR HARD-FINE MACHINING INTERNALLY TOOTHED GEARWHEELS BY MEANS OF A TOOTHED HONING MACHINE

Abstract

A method for machining an internally toothed workpiece, in which the workpiece is clamped into a toothed honing machine, and in which at least one tool that is at least partially made of a high-hardness cutting material is guided along respective teeth of the internally toothed workpiece, in order to carry out hard-fine machining of the teeth of the internally toothed workpiece.

Claims

1-13. (canceled)

14. A method for machining an internally toothed workpiece, comprising: the workpiece is clamped into a mount of a toothed honing machine, said mount being provided for the insertion of a honing ring, and at least one tool that is at least partially made of a high-hardness cutting material is guided along respective teeth of the internally toothed workpiece, in order to carry out hard-fine machining of the teeth of the internally toothed workpiece.

15. The method as claimed in claim 14, wherein an internally toothed gearwheel with hardened tooth flanks is chosen as the workpiece.

16. The method as claimed in claim 14, wherein polycrystalline diamond, especially a ceramically bonded diamond is chosen as the high-hardness cutting material.

17. The method as claimed in claim 14, wherein boron nitride, especially cubic ceramically bonded boron nitride is chosen as the high-hardness cutting material.

18. The method as claimed in claim 14, wherein at least one externally toothed gearwheel-shaped tool is chosen as the at least one tool, wherein the at least one tool is broader than the workpiece by a multiple, especially a twofold or a threefold factor.

19. The method as claimed in claim 18, wherein an axis intersection angle of the at least one tool with the workpiece is modified, so that the workpiece contacts the at least one tool at a predetermined point.

20. The method as claimed in claim 18, wherein the tool is displaced axially along an axis running horizontally or vertically through a center point of the tool, so that the workpiece contacts the at least one tool at a predetermined point.

21. The method as claimed in claim 5, wherein the at least one tool has regions with different surface properties along a longitudinal axis of the tool, and in which the at least one tool is moved along the workpiece in a predetermined movement sequence, in order to make contact with and accordingly to machine the workpiece in succession with respective regions of the at least one tool having different surface properties.

22. A tool for the machining of an internally toothed workpiece, comprising: the tool is at least partially made of a high-hardness cutting material and has different regions with different surface properties along a longitudinal axis of the tool.

23. The tool as claimed in claim 22, wherein the tool is configured to machine respectively one tooth flank of a tooth of the internally toothed workpiece, or two tooth flanks, and/or one tooth root of respective teeth bordering on a recess of the internally toothed workpiece at the same time, while the tool is moved along the internally toothed workpiece.

24. The tool as claimed in claim 22, wherein the tool is configured in a dressable manner.

25. A toothed honing machine comprising: a mount for a workpiece and a helical-shaped dressing tool that works in a continuous process, wherein the dressing tool is configured to dress, at least in regions, at least one tool that is at least partially made of a high-hardness cutting material, said tool to be moved on the inside along an internally toothed workpiece to be introduced in in the mount.

26. The toothed honing machine as claimed in claim 25, wherein the mount is a mount in which, in a honing mode of the toothed honing machine, a honing ring is to be inserted for the machining of an externally toothed workpiece, and in which the internally toothed workpiece is inserted instead of the honing ring.

Description

[0032] Further advantages and embodiments of the invention will emerge from the description and the accompanying drawing.

[0033] Of course, the above-mentioned features and the following features yet to be explained can be used not only in the particular indicated combination, but also in other combinations or standing alone, without leaving the scope of the present invention.

[0034] The invention is represented schematically in the drawing on the basis of embodiments and shall be described schematically and at length with reference to the drawing.

[0035] FIG. 1 shows one possible embodiment of a tool configured according to the invention for carrying out one possible embodiment of the proposed method.

[0036] FIG. 1 shows a workpiece 1 in the form of an internally toothed gearwheel. The workpiece 1 has been clamped in a toothed honing machine, not represented, in the place where a honing ring is traditionally clamped when the toothed honing machine is used for honing.

[0037] In order to hard-fine machine respective teeth, i.e., especially tooth flanks and/or tooth roots of the workpiece 1, it is proposed to install a tool 3 at a place of the toothed honing machine where a workpiece is traditionally clamped when the toothed honing machine is used for honing. This means that the tool 3 and the workpiece 1 are arranged and rotate at an axis intersection angle so that a removal of material occurs on respective teeth of the workpiece 1. The tool 3 can be moved along an axis 15 of the tool 3, as indicated by arrow 13. The workpiece 1 itself may also be moved, as suggested by arrow 7, in order to assist the rolling movement of the tool 3 against the teeth.

[0038] The workpiece 1 comprises tooth flanks 9 at respective teeth, said flanks composed of hardened material. In order to fine machine the tooth flanks 9, the tool 3 has a coating of a high-hardness or high-strength cutting material, such as diamond or boron nitride.

[0039] In the present instance, the tool 3 is configured for a single-flank contact, i.e., a machining of only one tooth flank 9 per movement of the tool 3. Of course, the tool 3 may also be configured to enable a machining of two tooth flanks 9 and/or one tooth root 11 of the workpiece 1 per movement, i.e., upon entering into a recess formed between two teeth.