Device and method for producing a spur toothing

Patent metadata

Field	Value
Publication number	US-12427565-B2
Application number	US-202218694594-A
Country	US
Kind code	B2
Filing date	Sep 8, 2022
Priority date	Oct 20, 2021
Publication date	Sep 30, 2025
Grant date	Sep 30, 2025

Abstract

A device for producing a spur toothing includes a tool holder arranged for rotational drive about a drive axis and longitudinal displacement along the drive axis, and a tool arranged on the tool holder. The tool includes an end face, a mating toothing disposed on the end face and arranged for forming a spur toothing on a workpiece, and a longitudinal axis arranged at an angle to the drive axis such that the longitudinal axis meets the drive axis at a wobble point. The mating toothing has a tooth base plane and the wobble point is disposed on the drive axis in front of or behind the tooth base plane such that, through rotary drive and longitudinal displacement of the tool holder with the associated wobbling rolling of the tool on the workpiece, the spur toothing formed by the mating toothing has a number of teeth that is unequal to a number of teeth of the mating toothing.

First claim

The invention claimed is:

1. A device for producing a spur toothing, comprising:
a tool holder arranged for rotational drive about a drive axis and longitudinal displacement along the drive axis; and
a tool arranged on the tool holder, the tool comprising:
an end face;
a mating toothing disposed on the end face and arranged for forming a spur toothing on a workpiece, the mating toothing comprising a tooth base plane; and
a longitudinal axis arranged at an angle to the drive axis such that the longitudinal axis meets the drive axis at a wobble point, wherein the wobble point is disposed on the drive axis in front of or behind the tooth base plane such that, through rotary drive and longitudinal displacement of the tool holder with the associated wobbling rolling of the tool on the workpiece, the spur toothing formed by the mating toothing has a first number of teeth that is unequal to a second number of teeth of the mating toothing, and the mating toothing comprises a plurality of embossing teeth and a plurality of guide teeth.

2. The device of claim 1 , wherein the wobble point is offset relative to the tooth base plane in a direction of the tool holder, such that the first number of teeth of the spur toothing is smaller than the second number of teeth of the mating tooling.

3. The device of claim 1 , wherein the wobble point is offset relative to the tooth base plane in a direction opposite the tool holder, such that the first number of teeth of the spur toothing is greater than the second number of teeth of the mating tooling.

4. The device of claim 1 , wherein the mating toothing comprises:
a plurality of radially extending teeth arranged circumferentially; and
a tooth gap disposed between each adjacent pair of the plurality of radially extending teeth.

5. The device of claim 1 , wherein each two of the plurality of embossing teeth arranged adjacent one another in a circumferential direction are spaced apart from one another by a respective tooth gap.

6. The device of claim 5 , wherein at least two of the plurality of embossing teeth and at least one of the plurality of guide teeth are arranged alternately in the circumferential direction.

7. The device of claim 1 , wherein:
each of the plurality of embossing teeth comprises an embossing tip head;
each of the plurality of guide teeth comprises a guide tip head; and
the embossing tip heads are axially higher than the guide tip heads.

8. The device of claim 1 , wherein tooth gaps circumferentially adjacent to each of the plurality of guide teeth are axially deeper than tooth gaps between circumferentially adjacent pairs of the plurality of embossing teeth.

9. A device for producing a spur toothing, comprising a tool holder with a tool arranged thereon, the tool having a mating toothing on an end face for forming a spur toothing on a workpiece, the tool holder being designed for a rotational drive about a drive axis and for longitudinal displacement, a longitudinal axis of the tool being arranged at an angle to the drive axis of the tool holder such that the longitudinal axis of the tool meets the drive axis of the tool holder at a wobble point,
wherein the wobble point is offset relative to a tooth base plane of the mating toothing of the tool along the drive axis in front of or behind the tooth base plane in such a way that, through rotary drive and longitudinal displacement of the tool holder with the associated wobbling rolling of the tool on the workpiece, a toothing with a first number of teeth that is unequal to a second number of teeth of the mating toothing of the tool is produced on the workpiece, and the mating toothing comprises a plurality of embossing teeth and a plurality of guide teeth.

10. The device according to claim 9 , wherein the wobble point is offset relative to the tooth base plane of the mating toothing of the tool along the drive axis in a direction of the tool holder, such that, when the mating toothing rolls with wobble on the workpiece, the first number of teeth is less than the second number of teeth.

11. The device according to claim 9 , wherein the wobble point is offset relative to the tooth base plane of the mating toothing of the tool along the drive axis in a direction opposite to the tool holder, such that, when the mating toothing rolls with wobble on the workpiece, the first number of teeth that is greater than the second number of teeth.

12. The device according to one of claim 9 , wherein the mating toothing has a plurality of teeth which are arranged adjacent one another in a circumferential direction and which extend in a radial direction, wherein every two teeth arranged adjacent to one another are in each case spaced apart from one another by a tooth gap.

13. The device according to claim 9 , wherein the embossing teeth each have a higher tip head in an axial direction of the tool than the guide teeth.

14. The device according to claim 9 , wherein tooth gaps between every two guide teeth arranged adjacent one another in a circumferential direction of the mating toothing or between a guide tooth and an embossing tooth arranged adjacent thereto in the circumferential direction of the mating toothing are deeper in an axial direction of the tool than tooth gaps between two embossing teeth.

15. The device according to claim 9 , wherein at least two embossing teeth are arranged adjacent one another in a circumferential direction of the mating toothing and spaced apart from one another by a respective tooth gap.

16. The device according to claim 15 , wherein at least two embossing teeth and at least one guide tooth are arranged alternately in a circumferential direction of the mating toothing.

17. A method for producing a spur toothing, comprising:
providing a device for producing the spur toothing, the device comprising a tool holder with a tool arranged thereon, the tool having a mating toothing on an end face for forming the spur toothing on a workpiece, the tool holder configured for rotational drive about a drive axis and for longitudinal displacement, a longitudinal axis of the tool being arranged at an angle (W) to the drive axis of the tool holder such that the longitudinal axis of the tool meets the drive axis of the tool holder at a wobble point, and the wobble point is offset relative to a tooth base plane of the mating toothing of the tool along the drive axis in front of or behind the tooth base plane,
axially displacing the tool holder in a direction of the workpiece and rotationally driving the tool holder about the drive axis thereof, such that the tool rolls with wobble on a surface of the workpiece so that a toothing with a first number of teeth which is not equal to a second number of teeth of the mating toothing of the tool is formed on the workpiece, and the mating toothing comprises a plurality of embossing teeth and a plurality of guide teeth.

Assignees

• Schaeffler Technologies Ag

Inventors

• Kaiser Andreas
• Koenig Daniel
• Eichelmann Frank

Classifications

• B23F15/06

  Making gear teeth on the front surface of wheels, e.g. for clutches or couplings with toothed faces · CPC title

• B23F5/16

  the tool having a shape similar to that of a spur wheel or part thereof · CPC title

• F16D2250/0023

  Shaping by pressure · CPC title

• F16D1/076

  by clamping together two faces perpendicular to the axis of rotation, e.g. with bolted flanges · CPC title

• B21K1/30 Primary

  with gear-teeth · CPC title