Flexible gear with destressing holes and preparation technology thereof

Abstract

The invention relates to a harmonic reducer, in particular to a flexible gear with destressing holes. The flexible gear comprises a flexible gear body which is of a hollow structure; the flexible gearbody comprises a cylinder body and a fixing platform, and the cylinder is located over the fixing platform and arranged along the inner diameter of the fixing platform; and the flexible gear body isprovided with the destressing holes, and the destressing holes are evenly formed in the cylinder body and the fixing platform at intervals and penetrate through the cylinder body and the fixing platform. A preparation method of the flexible gear with the destressing holes comprises the processes of forging, normalizing, isothermal annealing, rough turning, quenching, low-temperature tempering, semi-fine turning, first-time fine turning, drilling, second-time fine turning, hobbing, polishing and burr removing, shot blasting, quality testing, rust preventing, packaging and warehousing. Accordingto the flexible gear with the destressing holes, the destressing holes of the flexible gear are additionally formed, therefore, the internal stress of the flexible gear is completely released, the fatigue life of the flexible gear is prolonged, the flexible gear machining technology is simplified, the production yield is increased, the manufacture cost is reduced, the product wall thickness is increased, and the torsional rigidity of the harmonic reducer is improved.

Description

technical field [0001] The invention relates to a harmonic reducer, in particular to a flexible spline with a stress relief hole and a preparation process thereof. Background technique [0002] Flexible gears are soft splines, which are thin-walled cup-shaped, thin-walled cylindrical or flush-embedded and so on. There is a ring gear outside the opening end of the thin-walled cylindrical flexible spline, which deforms with the rotation of the wave generator, and the bottom part of the cylinder is connected with the output shaft. Generally, the gear transmission adopts a rigid mechanism, and the rotating parts are also rigid, while the harmonic gear transmission is a new type of transmission that uses the elastic deformation motion of the flexible working member to achieve the purpose of transmission. The flexible wheel structure has the following two major types: Classes: 1. Cup type flexspline; 2. Hat type flexspline. [0003] One: because the flexspline passes through the...

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Problems solved by technology

[0004] Second: When the flexspline undergoes elastic deformation, the internal stress of the product torsion during the rotation process is transmitted to the surroundings through the side wall, causing the internal stress to reach more than 400MPA; The aging of the wheel makes it easy to break, resulting in low life of the flexspline; the problems are: 1. The internal stress cannot be completely released, and all materials are absorbed; 2. The wall of the flexspline is thin and difficult to process; 3. The life of the flexspline is low; Torsional stiffness of wave reducer

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