Method for calculating tooth surface wear of double circular arc harmonic reducer

Abstract

The invention discloses a method for calculating tooth surface wear of a double circular arc harmonic reducer. The method comprises the following steps of, firstly, establishing a tooth profile equation of a flexible gear-rigid gear of the double circular arc harmonic reducer based on original parameters; secondly, determining parameters such as tooth profile parameters, contact positive pressureand wear coefficients; based on an improved Archard wear model, calculating the wear loss of the tooth surface node k of the flexible gear and the rigid gear in a wear period; repeating the wear circulation until the total wear loss of the node reaches a preset threshold value, wherein the contact positive pressure and the tooth profile parameter of the tooth surface are changed due to the tooth surface wear; further, reconstructing the flexible gear-rigid gear tooth profile equation, and recalculating the contact positive pressure; and summing the wear loss of the node k after the tooth profile is changed m times until the wear loss reaches the maximum allowable wear loss. The method for calculating tooth surface wear of the double circular arc harmonic reducer provides a theoretical basis for improving the transmission precision and the accuracy of life prediction of the harmonic reducer.

Description

technical field [0001] The invention belongs to the technical field of gear wear calculation, and in particular relates to a calculation method for gear wear of a double-arc harmonic reducer. Background technique [0002] The structure of the harmonic reducer includes a wave generator, a flexible spline, and a rigid spline. Among them, the flexible spline is a flexible external gear, and the rigid spline is a rigid internal ring gear. The harmonic reducer has the advantages of compact structure, small size, light weight, large transmission ratio and carrying capacity, and high transmission precision. Compared with the harmonic reducer with involute tooth shape, there are conjugate motion and "double conjugate" meshing intervals in the meshing process of the flexible gear with double arc tooth shape and the rigid wheel, which effectively reduces interference and prevents torsion The increase in stiffness and transmission accuracy plays an important role. [0003] Scholars ...

AI Technical Summary

Problems solved by technology

The harmonic reducer has many contact tooth pairs and has a large meshing area. It is difficult to determine the load distribution law between the meshing tooth pairs, and the wear of the tooth surface will also be affected by the deformation of the flexspline and the lubrication characteristics of the meshing area. Therefore, its wear The mechanism itself is complex

At present, the research on the failure mechanism of the tooth surface of the flexible spline and rigid spline is very limited, which seriously restricts the improvement of the reliability of the harmonic reducer.

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