Gear hobbing machines are more efficient than gear shaper machines, but they offer lower tooth profile accuracy.

Gearing Machine Processing Features

Production efficiency is high.

2. Gear hobbing is the only method for machining worm gears.

3. The tooth profile accuracy of gear hobbing is lower than that of gear shaper. The number of tangents forming the tooth profile envelope is only related to the number of chip clearance slots in the hob and the number of basic worm threads, and it cannot be increased or decreased by changing the machining conditions.

Cutting Gear Machine Processing Features

When cutting large module gears, the hobbing speed is restricted by the reciprocating inertia of the hob spindle and the machine tool rigidity; the cutting process also incurs time losses due to non-cutting strokes, resulting in lower productivity compared to gear shaping. Only when machining small module, high-tooth-count gears with narrow gear widths, does the productivity of hobbing exceed that of gear shaping.

2. The齿向error during the gear cutting process primarily depends on the parallelism error between the spindle rotation axis of the gear cutting machine and the rotation axis of the worktable. Due to the high frequency of reciprocating motion of the gear cutting tool during operation, it leads to significant wear between the spindle and sleeve, resulting in a relatively large gear cutting齿向error.

3. The number of tangents forming the involute profile is determined by the circumference feed rate size and is selectable. During the gear insertion process, the cutting along the gear direction by the gear cutting tool is continuous, and the surface roughness of the gear during insertion is finer.

4. Machining gears with shoulders and double or multi-gear sets with extremely narrow blank slots can only be done using a gear shaper.