Optimization method of natural distortion micro-modification for helical gear grinding with worm grinding wheel

Abstract

The invention discloses a natural twist microscopic profile correction optimization method of a worm grinding wheel grinding helical gear. A meshing model of the worm grinding wheel grinding helical gear is constructed to deduce a contact trace equation, a gear form and lead evaluation range is selected, a gear surface twisting model is established, and a gear form and lead angle deviation value is obtained under the natural twist of the worm grinding wheel grinding helical gear; the correlation detection data of an existing project is collected, a twist quantity under natural twist is calculated, whether calculation data and detection data are matched or not is verified, and a transferring error under existing natural twist is calculated; and therefore, gear microscopic profile correction parameters related to the natural twist are optimized, wherein optimization comprises the following steps of: reducing a lead drum-shaped size, regulating a mating gear drum-shaped size, regulating a mating gear twist quantity, and lowering and compensating influence brought by the natural twist of the worm grinding wheel grinding helical gear. By use of the method, gear bearing performance can be effectively improved, gear meshing impact is reduced, and transmission accuracy and a NVH (Noise Vibration and Harshness) level are improved.

Description

technical field [0001] The invention relates to a technology in the field of mechanical structures, in particular to a natural distortion microscopic modification optimization method for grinding helical gears with a worm grinding wheel. Background technique [0002] During the gear transmission process, as the speed increases and the load increases, the deformation of the gear and the support system increases significantly, coupled with the influence of manufacturing errors and installation errors, etc., resulting in meshing and meshing impacts and partial loads during the gear transmission process , resulting in vibration and noise. Tooth direction modification Compensate the partial load phenomenon caused by tooth direction error, installation error and shaft deformation through slight modification of the tooth direction, so that a pair of gears can be kept in contact with the middle of the tooth width as much as possible, so that the gears can run smoothly and the gear c...

AI Technical Summary

Problems solved by technology

Tooth surface distortion will lead to increased backlash, increased vibration and noise, and reduced meshing transmission accuracy, which will affect the NVH (Noise, Vibration, Harshness, and roughness) performance of the gearbox

At present, the main foreign gear grinding machine manufacturers have relevant measures to control or compensate the natural distortion of the tooth surface during the grinding process, but most of the domestic worm wheel gear grinding machines cannot realize the distortion of the tooth surface of the grinding tooth well. control or compensation

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