Problems in the grinding of planetary gears

Planetary gear is one of the important parts in the final drive system of the bulldozer. Due to its large load-bearing force, frequent forward and reverse rotation and other working conditions, its design and manufacturing accuracy requirements are very high. The tooth surface adopts carburizing and quenching process, and the halogen surface The hardness is as high as HRC58-HRC64, which is typicalHardened gear.

In the finishing process of hardened gears, gear grinding is the most effective and reliable method to obtain high-precision gears. It can process hardened gears, correct various errors caused by gear pre-processing, eliminate heat treatment deformation, and improveGear processingAccuracy.

However, there are the following problems in the grinding of planetary gears:

Planetary gearAfter gear grinding, testing is required, and the testing items are mainly:

Tooth profile tolerance (Fa), tooth direction error (Fβ), tooth pitch cumulative total deviation error (Fp), radial runout error (Fr) and common normal length variation error (Fw).

Only when the above-mentioned test items meet the design requirements, can the smoothness, accuracy and uniformity of load distribution of the planetary gear's transmission movement be guaranteed.