Causes of tooth surface roughness, tooth pitch accumulation, tooth profile and tooth direction errors in gear shaping

The reasons for gear shaping, tooth surface roughness, tooth pitch accumulation, tooth profile and tooth direction errors are explained as follows, for reference and understanding.

Reasons for tooth surface roughness error:

1. After the worm pair is worn, the gap is too large, and vibration occurs during cutting.

2. Vibration occurs on the worktable; the workpiece and the tool are not installed properly, which may cause vibration during cutting.

3. Let the knife mechanism return abnormally and scratch the surface of the workpiece.

4. The cutting edge of the gear shaper is worn, the cutting parameters are unreasonable, and the heat treatment of the workpiece is inappropriate.

Reasons for accumulation of gear shaper pitch:

1. The movement error of the working worm pair and the tool post worm pair, the meshing gap is large.

2. The feed cam wears and the radial circle runout is out of tolerance.

3. Make the knife unstable and loosen the insert.

4. The cumulative error of the tooth pitch of the gear shaper is large.

5. Eccentric installation of workpieces and tools.

6. The radial circle runout of the workpiece spindle and the tool spindle is out of tolerance; the end face circle runout is out of tolerance.

7. Insufficient spring force for radial feed.

Causes of tooth profile errors:

1. The front angle of the gear shaper is too large.

2. The pitch error of the indexing worm, the axial radial circle runout is out of tolerance, the transmission chaingearThe movement error.

3. The radial runout of the worktable and tool shaft is out of tolerance.

4. The workpiece and the tool are installed eccentrically.

Reasons for gear shape error:

1. The error of parallelism between the moving direction of the tool spindle and the axis of the worktable is out of tolerance.

2. The end face of the work piece and the worktable has out of tolerance.

3. Inclination of the axis of the mandrel.

4. Clamping deformation of thin-walled parts.

5. The stroke of the gear shaper cutter is too small.

6. Make the knife not enough.