Gear shaft processing technology analysis

In the entire process of shaft processing, sufficient heat treatment processes should be arranged to ensure the mechanical properties and processing accuracy requirements of the gear shaft and improve the processing performance of the workpiece.
Generally, normalizing treatment is arranged first after the shaft blank is forged to eliminate forging internal stress, refine the grains, and improve the cutting performance during machining.
Tempering and tempering treatment is arranged after rough machining. In the rough machining stage, most of the machining allowance of the gear shaft is removed after rough turning, drilling and other processes. The cutting force and heat generation during rough machining are very large. Under the action of force and heat, the shaft produces a lot of internal stress. The internal stress can be eliminated through tempering treatment, replacing aging treatment, and the required toughness can be obtained at the same time.

After semi-machining, except for important surfaces, other surfaces have reached the design size. Only finishing allowance is left for important surfaces. At this time, local quenching treatment is arranged on the teeth to meet the designed hardness requirements and ensure the wear resistance of these surfaces. The subsequent finishing process can eliminate quenching deformation.