Carburizing and quenching large inner gear ring machining method

Abstract

The invention discloses a carburizing and quenching large inner gear ring machining method. The method comprises the steps of removing of machining stress, semi-finish turning, gear milling, carburizing, induction quenching, finish turning and tooth grinding in sequence after tooth punching is completed; carburizing is carried out according to the set depth of a hardening layer; tooth-by-tooth induction quenching is carried out in a profiling mode in the induction quenching process; a vertical lathe is used during finish turning for clamping and machining the machining content including a tooth grinding and clamping benchmark; the alignment process of finish turning includes preliminary alignment and accurate alignment, preliminary alignment is carried out according to the alignment gear center and the leveling end surface, and gear deformation data are obtained by detecting gear reference circle run-out values of multiple sections in the tooth width direction; accurate alignment is conducted according to the obtained gear deformation data and the tooth grinding allowance uniform distribution principle; and according to tooth grinding, the tooth surface is ground to obtain a finished product. The method has the beneficial effects that the gear can be made of low-carbon alloy steel, and is long in service life, low in energy consumption, low in machining cost and high in 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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