Gear flank modification and precision control based on electronic gearbox

Abstract

Gear flank modification is essential to reduce the noise generated in the gear meshing process, improve the gear transmission performance, and reduce the meshing impact. Aiming at the problem of solving the additional motions of each axis in the higher-order topology modification technique and how to accurately add the different movements expressed in the form of higher-order polynomials to the corresponding motion axes of the machine tool, a flexible higher-order gear topology modification technique based on an electronic gearbox is proposed. Firstly, a two-parameter topology gear surface equation and a grinding model of wheel grinding gears are established, and the axial feed and tangential feed are expressed in a fifth-order polynomial formula. Secondly, the polynomial coefficients are solved according to the characteristics of the point contact when grinding gears. Finally, an improved electronic gearbox model is constructed by combining the polynomial interpolation function to achieve gear topology modification. The validity and feasibility of the modification method based on the electronic gearbox are verified by experimental examples, which is of great significance for the machining of modification gears based on the continuous generative grinding method of the worm grinding wheel.

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Central South University