A processing method of carburizing and quenching large internal tooth ring gear

Abstract

The invention discloses a carburizing and quenching large internal tooth ring gear processing method, which comprises the steps of removing machining stress, semi-finishing, milling, carburizing, induction hardening, finishing and grinding in sequence after tooth opening is completed. Among them, carburizing is carried out according to the set depth of hardened layer; induction hardening adopts profiling method for tooth-by-tooth induction hardening; finishing car adopts vertical lathe clamping and processing including the processing content of grinding gear clamping benchmark; The alignment process includes preliminary alignment and precise alignment. Preliminary alignment is carried out according to the alignment gear center and leveling end face, and the gear deformation data is obtained by detecting the gear pitch circle runout values ​​of multiple sections in the tooth width direction; the precise alignment is based on the obtained The gear deformation data is corrected according to the principle of uniform distribution of the grinding allowance; the finished product is obtained by grinding the tooth surface. The beneficial effect of the invention is that the gear can be made of low-carbon alloy steel, has long service life, low energy consumption, low processing cost and high production efficiency.

Description

technical field [0001] The invention relates to gear processing technology, in particular to a carburizing and quenching large internal tooth ring gear processing method. Background technique [0002] The development trend of gearboxes in the machinery industry is light weight, large size, high power density, 20-year lifespan or even unlimited lifespan. As a very important form of gearbox, planetary gearbox plays an especially obvious role in the national economy. At present, the wind power gearbox has been developed to 5 MW, 7 MW or even more than 10 MW. The internal ring gear, which is a key part of the planetary gearbox, also has higher requirements. The inner ring gear not only requires carburizing and quenching of low-carbon alloy carburizing steel, but also requires high mechanical properties in the core structure, including high strength, high toughness, impact resistance, and high hardness on the tooth surface. Usually, the Rockwell hardness requirement is HRC58-6...

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a carburizing and quenching large internal tooth ring processing method for the existing large internal tooth ring gear processing method that cannot achieve the design accuracy and life. Ensure the depth and hardness of the hardened layer so that low-carbon alloys can be used to manufacture gears, so that the gear core has good comprehensive mechanical properties, and the tooth surface has sufficient strength, hardness and wear resistance to ensure service life; During the clamping process, through two alignments, the grinding allowance after processing is evenly distributed, and the gear accuracy is ensured by grinding the teeth, so as to ensure the meshing accuracy of the gears and prolong the service life

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