Method for the manufacture of a gear component, and gear grinding machine

Patent metadata

Field	Value
Publication number	US-11278976-B2
Application number	US-202016912140-A
Country	US
Kind code	B2
Filing date	Jun 25, 2020
Priority date	Jun 26, 2019
Publication date	Mar 22, 2022
Grant date	Mar 22, 2022

Abstract

A method for the manufacture of a gear component includes, in a soft machining process, introducing a preliminary toothing 3 with a machining allowance 7 that is fixed relative to a final toothing 4 into a blank such that a semi-finished part 2 is produced. The method also includes, in a fine machining process, removing the machining allowance 7 and producing the final toothing 4 of the toothed component. The machining allowance 7 is removed in a single-stage hobbing method by a grinding tool 1 , wherein the grinding tool 1 removes the machining allowance completely in a single stroke movement H.

First claim

The invention claimed is:

1. A method for the manufacture of a gear component, such as a gear wheel, comprising:
in a soft machining process, introducing a preliminary toothing ( 3 ) having a machining allowance ( 7 ) that is fixed relative to a final toothing ( 4 ) into a blank such that a semi-finished part ( 2 ) is produced; and
in a fine machining process, removing the machining allowance ( 7 ) and producing the final toothing ( 4 ) of the gear component,
wherein the machining allowance ( 7 ) is removed in a single-stage hobbing method by a grinding tool ( 1 ), and the grinding tool ( 1 ) removes the machining allowance completely in a single stroke movement (H),
wherein, in the soft machining process, the machining allowance ( 7 ) is produced with a value less than fifty micrometers,
wherein the grinding tool ( 1 ) comprises abrasive grains that remove the machining allowance ( 7 ) and produce the final toothing ( 4 ) of the gear component during the single stroke movement (H),
wherein the grinding tool ( 1 ) removes the machining allowance ( 7 ) simultaneously from both flanks of each tooth of the preliminary toothing ( 3 ) during the single stroke movement (H), and
wherein the semi-finished part ( 2 ) is rotated about a workpiece axis (A 1 ) during the fine machining process, and the single stroke movement (H) is substantially parallel to the workpiece axis (A 1 ).

2. The method of claim 1 , wherein the grinding tool ( 1 ) is operated in a counter-direction grinding mode during the single stroke movement (H).

3. The method of claim 1 , wherein the grinding tool ( 1 ) is a grinding worm, and the machining allowance ( 7 ) is removed by rolling kinematics between the grinding tool ( 1 ) and the semi-finished part ( 2 ).

4. The method of claim 1 , wherein the preliminary toothing ( 3 ) is introduced into the blank in the soft machining process by hobbing.

5. The method of claim 1 , wherein the semi-finished part ( 2 ) is hardened in a hardening process after the soft machining process.

6. The method of claim 1 , wherein the semi-finished part ( 2 ) is deburred in a deburring process after the soft machining process.

7. The method of claim 1 , wherein the grinding tool ( 1 ) is dressed in a two-stage dressing process by a dressing tool, and the grinding tool ( 1 ) is profiled in a first stage and ground in a second stage.

8. The method of claim 7 , wherein the dressing of the grinding tool ( 1 ) takes place in a same-direction dressing mode.

9. The method of claim 1 , wherein the semi-finished part ( 2 ) to be machined is rotated about a workpiece axis (A 1 ), and the stroke movement (H) takes place axially with respect to the workpiece axis (A 1 ).

10. The method of claim 9 , wherein the grinding tool ( 1 ) is fed to the semi-finished part ( 2 ) in an infeed movement (Z), and the infeed movement (Z) takes place perpendicularly to the workpiece axis (A 1 ).

11. The method of claim 10 , wherein the grinding tool ( 1 ) is moved in a shift movement (S) relative to the semi-finished part ( 2 ) before, during, or after the stroke movement (H), and the shift movement (S) takes place tangentially with respect to the rotating semi-finished part ( 2 ).

Assignees

• Zahnradfabrik Friedrichshafen

Inventors

• Hoener Franz-Josef
• Klein Frank
• Barrois Thomas

Classifications

• B23F5/04

  the tool being a grinding worm · CPC title

• B23P15/14 Primary

  gear parts, e.g. gear wheels · CPC title

• B23F17/00

  Special methods or machines for making gear teeth, not covered by the preceding groups · CPC title

• B23F5/02

  by grinding · CPC title

• B23F1/026 Primary

  with plural tools · CPC title