Pinion machining process

Abstract

The invention discloses a pinion machining process. The pinion machining process is characterized in that raw materials are 22CrNi2MoNbH steel, and includes the steps of forging blank, annealing the blank at constant temperature, finely machining a pinion primarily, carburizing pinions, tempering at high temperature, machining the pinion, hardening the pinion, tempering at low temperature and finishing the gear. In the pinion machining process, 22CrNi2MoNbH steel is used as raw materials, and by changing the internal structure of the pinion, anti-bending and anti-contacting fatigue ability and mesh strength of the pinion are improved.

Description

Technical field [0001] The invention belongs to the field of mechanical technology, specifically a pinion gear processing technology. Background technique [0002] The pinion gear of the existing high-horsepower bulldozer requires a heavy load to be transmitted, and the size of the pinion gear is small and the module is large due to the influence of space. Design requirements for pinion shaft (module 12 mm, number of teeth 12, index circle diameter 144 mm, tooth width 124 mm) surface hardness 60 ~ 64 HRC, hardened layer depth 2.2 ~ 2.8 mm, tooth root hardened layer depth 1.5 mm or more , The hardness of the core is 269 ~ 388 HB. The 20CrMoH steel was originally used. After carburizing and quenching, the hardness of the core is low, which cannot meet the design requirements. Summary of the invention [0003] The purpose of the present invention is to address the shortcomings of the above-mentioned technology. The present invention provides a pinion gear processing technology. By c...

AI Technical Summary

Problems solved by technology

[0002] The pinion of the final drive of the existing high-horsepower bulldozer is required to transmit heavy loads. Due to the influence of space, the size of the pinion is small and the modulus is large.

Design requirements: pinion shaft (module 12 mm, number of teeth 12, pitch circle diameter 144 mm, tooth width 124 mm), surface hardness 60-64 HRC, hardened layer depth 2.2-2.8 mm, tooth root hardened layer depth 1.5 mm or more , The hardness of the core is 269 ~ 388 HB. Originally, 20CrMoH steel was used. After carburizing and quenching, the hardness of the core is low, which cannot meet the design requirements.