Method for protecting large aviation spiral bevel gears against grinding burn

Abstract

The invention belongs to the technical field of machining, and particularly relates to a method for protecting large aviation spiral bevel gears against grinding burn. According to the method, three cooling oil pipes are added to a spraying position of cooling oil and the calibers of the oil pipes are reduced, so that the cooling pressure is increased, and an intermediate point is found for tool setting according to the tooth pitch accumulated tolerance of parts; by the adoption of the method, the large aviation spiral bevel gear can be effectively protected against the grinding burn, and theeffect is remarkable; and through actual verification, the qualified rate of machined products is greatly improved.

Description

technical field [0001] The invention belongs to the technical field of mechanical processing, and in particular relates to a method for preventing grinding burns of large aviation spiral bevel gears. Background technique [0002] The existing spiral bevel gears need to be ground. The diameter of a large spiral bevel gear is generally between Φ450mm and Φ500mm. Due to the large number of teeth, thin wall thickness, and large heat treatment deformation, the cumulative tolerance of the pitch after heat treatment becomes larger, and the helix angle The error becomes larger, and the size of the root cone and the installation distance from the end face show different trends according to the change of pressure quenching. Therefore, the consistency of the tooth surface state of each part before grinding is poor, resulting in long processing time and unstable state of the arc gear grinding, and It is very easy to produce batch grinding burns, and often the whole batch of parts is scr...

AI Technical Summary

Problems solved by technology

[0002] The existing spiral bevel gear needs to be ground. The diameter of a large spiral bevel gear is generally between Φ450mm and Φ500mm. Due to the large number of teeth, thin wall thickness, and large heat treatment deformation, the cumulative tolerance of the pitch after heat treatment becomes larger, and the helix angle The error becomes larger, and the dimensions of the root cone and the installation distance from the end face show different trends according to the change of pressure quenching. Therefore, the consistency of the tooth surface state of each part before grinding is poor, resulting in long processing time and unstable state of the arc gear grinding, and It is very easy to produce batch grinding burns, and the whole batch of parts is often scrapped, which seriously affects the progress of product processing

There is currently no way to prevent grinding burns

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