Pinion machining process

A processing technology and pinion technology, applied in the field of pinion processing technology, can solve problems such as space influence, low hardness of the core, failure to meet design requirements, etc.

Inactive Publication Date: 2016-10-05
重庆麦卡瑞机械制造有限公司
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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 w

Method used

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Embodiment Construction

[0007] The present invention will be further described in the following embodiments:

[0008] A pinion gear processing technology. The material is 22CrNi2MoNbH steel. The processing technology includes the following steps: forging blank-rough isothermal annealing-initial finishing gear-gear carburization-high temperature tempering-gear processing-gear quenching-low temperature tempering of gear- Precision grinding gear; said forging blank: preheating temperature 650℃~850℃, heating temperature 1200℃~1250℃, initial forging temperature 1100℃~1150℃, final forging temperature 850℃~900℃; said blank is isothermal Annealing: heating and heating at a rate of ≤80°C / h to 1200°C, at a rate of 32-53°C / h to furnace cooling at 900°C, and furnace cooling at a rate of 10-20°C / h to furnace cooling at 500-800°C, Keep the temperature for 3-5 hours, then air-cooled; the gear carburizing: the gear is heated to a processing temperature of 1100°C to 1250°C; the processed component is kept at the process...

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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...

Claims

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Application Information

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IPC IPC(8): B23P15/14
Inventor 凌庭贵
Owner 重庆麦卡瑞机械制造有限公司
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