Technique for processing welded structure cement carbon quenching gear

Abstract

The invention discloses a process for processing a carburizing and quenching gear with a welding structure. The process is performed according to the following steps: the inner circle, the outer circle and the two end surfaces of a gear ring are processed, a hub and a radial plate are processed, and the margins are kept on the inner hole and the two end surfaces of the hub; the tooth form of the gear ring is coarsely processed, and the margins are kept; the gear ring is carburized, quenched, oil-cooled and low-temperature tempered; the radial plate and the hub are group-welded, and the gear ring and the radial plate are group-welded on a rotary work table of an automatic welding machine, the gear ring is pre-heated before welding, in the turning process when the gear ring is pre-heated and welded, the tooth part is cooled by cooling fluid through a cooling device, so that the temperature of the tooth part is below 200 DEG C; the ultrasonic crack detection of the welding seam is preformed; the stress is eliminated by the spectral harmonic vibration; and the precision machined step is performed. The process can ensure the hardness and the performance of the tooth surface of the gear as well as the quality of the welding seam after the gear ring is carburized and quenched, thereby solving the problem of the crack of the welding seam; moreover, by adopting the vibration stress eliminating process to eliminate the welding stress, the environment is protected, and the energy consumption is greatly lowered.

Description

technical field [0001] The invention relates to a technological scheme of a gear, in particular to a processing technology of a large-scale welded structure carburized and quenched gear. Background technique [0002] For large-scale gearboxes, while ensuring high-power transmission, in order to adapt to the use of some special occasions, the need for light weight must also be considered. At the same time, the teeth of the gears must be wear-resistant and impact-resistant, and better alloy materials must be used. , In order to save costs, large gears are generally not integral structures, and the ring gear, spokes, and hubs are often processed separately, and then welded, baked or connected into a whole with fasteners. Since the radial thickness dimension of the ring gear of the welded structure carburizing and quenching gear can be reduced accordingly, more expensive alloy materials are saved, and complicated procedures such as drilling and reaming in the combined gear are r...

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is to provide a process for carburizing and quenching gears with a welded structure, which can not only maintain the hardness and performance of the gear tooth surface after carburizing and quenching, but also ensure the quality of the weld seam, solve welding deformation, weld seam cracking problem

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