Reasons for tooth surface roughness, accumulated tooth pitch, and tooth orientation errors in gear hobbing

Writer： admin Time：2024-06-09 15:04:36 Browse：97℃

Reasons for roughness error of gear tooth surface

The clearance between the worm gear pairs is too large after wear, causing vibration during cutting

The workbench generates vibration, and the workpiece and tool are not properly installed, causing vibration during cutting.

Abnormal return of the cutting mechanism, causing scratches on the surface of the workpiece.

Wear of the cutting edge of the gear shaping cutter, unreasonable cutting parameters, and inappropriate heat treatment of the workpiece.

The reason for the accumulation of tooth pitch in gear hobbing

The motion error and meshing clearance of the working worm gear pair and the tool holder worm gear pair are large.

Wear of the feed cam and excessive radial runout.

Make the knife unstable and the inlay loose.

The cumulative error of the tooth pitch of the gear cutter is large.

Eccentricity of workpiece and tool installation.

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

Insufficient radial feed spring force.

Reasons for tooth profile errors in gear shaping

The front angle of the gear cutter is too large

The pitch error of the indexing worm, the deviation of axial and radial circular adjustment, and the motion error of the gears in the transmission chain.

The radial circular runout of the workbench and tool shaft is out of tolerance

Eccentricity of workpiece and tool installation

Reasons for tooth alignment errors in gear shaping

The parallelism error of the tool spindle movement direction on the worktable axis exceeds the tolerance limit

The adjustment of the end circle of the workpiece and worktable exceeds the tolerance

The inclination of the central axis

Clamping deformation of thin-walled parts

Excessive travel of the gear cutter is too small

Make the cutting amount insufficient.