Method for machining the tooth flanks of bevel gear workpieces

Patent metadata

Field	Value
Publication number	US-10702936-B2
Application number	US-201815923656-A
Country	US
Kind code	B2
Filing date	Mar 16, 2018
Priority date	Mar 17, 2017
Publication date	Jul 7, 2020
Grant date	Jul 7, 2020

Abstract

A method for machining the tooth flanks of a bevel gear workpiece includes carrying out correction machining of a concave tooth flank and a convex tooth flank of at least one tooth gap by, after machining using a first machine setting, cutting free of the concave tooth flank by the bevel gear workpiece executing a workpiece rotation in a first rotational direction having a predefined first absolute value in relation to a gear-cutting tool and/or cutting free the convex flank by the bevel gear workpiece executing a workpiece rotation in another rotational direction having a predefined second absolute value in relation to the gear-cutting tool, and finish machining the concave tooth flank using a second machine setting, which differs from the first machine setting, and finish machining the convex tooth flank using a third machine setting, which differs from the second machine setting.

First claim

What is claimed is:

1. A method for machining the tooth flanks of a bevel gear workpiece comprising the following steps:
a) rotationally driving a gear-cutting tool and machining a bevel gear workpiece using a chip removal process including plunging the gear-cutting tool into the workpiece using a first machine setting up to a predefined depth into material of the bevel gear workpiece to machine a concave tooth flank and a convex tooth flank of at least one tooth gap of the bevel gear workpiece, and
b) performing a correction machining of the concave tooth flank and the convex tooth flank of the at least one tooth gap including
(i) one or more of (1) cutting free the concave tooth flank including rotating the workpiece in a first rotational direction to an angle defined by a predefined first absolute value relative to the gear-cutting tool; or (2) cutting free the convex tooth flank including rotating the workpiece in another rotational direction to an angle defined by a predefined second absolute value relative to the gear-cutting tool, thereby enlarging a gap width of the at least one tooth gap, and
(ii) finish machining the concave tooth flank using a second machine setting, which differs from the first machine setting, and
(iii) finish machining the convex tooth flank using a third machine setting, which differs from the second machine setting.

2. The method according to claim 1 , including performing the steps of cutting free the concave tooth flank and finish machining the concave tooth flank simultaneously and using the second machine setting.

3. The method according to claim 1 , including performing the steps of cutting free the convex tooth flank and finish machining of the convex tooth flank simultaneously and using the third machine setting.

4. The method according to claim 1 , further including transitioning the gear-cutting tool from the first machine setting into the second machine setting while the gear-cutting tool is partially located in the at least one tooth gap.

5. The method according to claim 1 , including cutting free the concave tooth flank and cutting free the convex tooth flank, wherein the predefined first absolute value is identical to the predefined second absolute value.

6. The method according to claim 1 , wherein the gear-cutting tool defines a cutter head gear-cutting tool defining bar cutters or cutter inserts, wherein each of the bar cutters or cutter inserts defines two cutting edges configured to machine the concave tooth flank and the convex tooth flank simultaneously during the step of machining the bevel gear workpiece using a chip removal process.

7. The method according to claim 1 , wherein the gear-cutting tool defines a cutter head gear-cutting tool defining bar cutters or cutter inserts, wherein a part of each of the bar cutters or cutter inserts defines a cutting edge configured to machine the concave tooth flank during the step of machining the bevel gear workpiece using a chip removal process, and wherein another part of each of the bar cutters or the cutter inserts defines a cutting edge configured to machine the convex tooth flank during the step of machining the bevel gear workpiece using a chip removal process.

8. The method according to claim 1 , wherein the correction machining step includes correcting flank angle errors in the workpiece oriented in a same direction that occurred during the step of machining the bevel gear workpiece using a chip removal process.

9. The method according to claim 1 , further including measuring the bevel gear workpiece before performing the correction machining step, wherein the measuring step is adapted to detect flank angle errors in the workpiece.

10. The method according to claim 1 , wherein the bevel gear workpiece is one bevel gear workpiece of a series of bevel gear workpieces, and the method further includes measuring the bevel gear workpiece after the step of machining the bevel gear workpiece using a chip removal process, and then subsequently performing correction machining of further bevel gear workpieces of the series of bevel gear workpieces.

11. The method according to claim 1 , wherein said plunging defines a single-indexing process or a continuous-indexing process.

12. The method according to claim 11 , wherein said plunging defines a continuous-indexing process, and the method further includes coupledly rotationally driving the bevel gear workpiece with said rotational driving of the gear-cutting tool.

13. The method according to claim 1 , wherein the bevel gear workpiece defines a crown gear workpiece.

Assignees

• Klingelnberg Ag

Inventors

• Weber Jürgen

Classifications

• B23F21/22

  Face-mills for longitudinally-curved gear teeth · CPC title

• B23F19/005

  using a face-mill-type tool, e.g. a milling or a grinding tool · CPC title

• B23F9/025

  with a face-mill-type, i.e. cup-shaped, grinding wheel · CPC title

• B23F9/10

  with a face-mill · CPC title

• B23F23/1218

  Checking devices for controlling workpieces in machines for manufacturing gear teeth · CPC title