Method for improving tooth trace precision of internal spline after heat treatment

Abstract

The invention relates to a technical method for improving the tooth trace precision of an internal spline after carburization. A core rod of which the shrinking percentage is smaller than that of a part material is applied to tightly support the small diameter of the part internal spline, and accordingly, the stability of the slope deformation tendency of the tooth trace of the part internal spline is controlled; and through data comparison, the tooth trace change error of the internal spline subjected to carburization heat treatment is analyzed and summarized, a grinding rod is applied to make contact with the unilateral tooth face of the part internal spline, and the grinding rod does linear reciprocating motion to finish the tooth face error of the internal spline. According to the technical method, the problem that after the small-modulus internal spline is subjected to carburization heat treatment, the tooth trace cannot be trimmed through tooth grinding equipment is solved. Through the technical scheme, the effects that the tooth length is 40 mm, the tooth trace error of the internal spline is smaller than or equal to 0.01 mm, and the tooth trace precision of the internal spline reaches fifth grade.

Description

technical field [0001] The invention relates to a method for improving the precision of tooth alignment of internal splines after heat treatment. Background technique [0002] In the aviation field, the accessory drive gear often uses internal splines as the way to transmit torque. With the continuous improvement of transmission stability requirements and the continuous increase of transmission torque, internal splines are often used for carburizing heat treatment requirements, and splines are required The precision of the tooth part reaches about 5~6 grades. The size and structure of aviation accessory transmission gears are small, so the internal splines usually have a small number of teeth and a small modulus. The minor diameter of the splines is generally between 10mm and 40mm, which is limited by the structural size and the capacity of the gear grinding equipment. The internal spline cannot be ground after carburizing heat treatment, and the deformation caused by carbu...

AI Technical Summary

Problems solved by technology

The inner spline cannot be ground after carburizing heat treatment, and the deformation caused by carburizing heat treatment cannot be eliminated

At present, after heat treatment, the carburizing deformation is trimmed by manually grinding the tooth direction of the spline with a grinding rod, but it cannot meet the precision requirements of the internal spline with a tooth direction of 5-6.