Precise design and profile modification method for asymmetric gear

Abstract

The invention relates to a precise design and profile modification method for an asymmetric gear. The method comprises the following steps that S1, the tooth profile equation of a rack tool is obtained according to the structure of the rack tool; S2, coordinate transformation is carried out on the tooth profile equation of the rack tool according to the movement rule of the rack tool to obtain a rack tool equation under a gear coordinate system; S3, a meshing equation is obtained according to the meshing rule of the rack tool and the gear; S4, the tooth profile equation of the asymmetric gear is determined according to the rack tool equation and the meshing equation; S5, three-dimensional modeling is carried out according to tooth profile data. The profile modification method directly carrying out pressure angle profile modification on the rack tool is disclosed, the tool after the profile modification can directly carry out machining to obtain the formed gear having the involute modified, the gear machining efficiency is improved, and the obtained formed gear through the profile modification is simple and practical.

Description

technical field [0001] The invention relates to an accurate design and modification method of an asymmetrical gear. Background technique [0002] Gear transmission is one of the important mechanical transmission methods. Currently, involute symmetrical gears are mainly used in industrial production. In the process of transmission, asymmetric gears can not only meet the requirements of fixed transmission ratio and variable center distance of symmetrical gears, but also improve the load-carrying capacity and have better dynamic characteristics. Therefore, in the transmission system with high torque and high speed It has a good application prospect and a good research value. [0003] The working tooth side and the non-working tooth side of the asymmetric gear have different pressure angles and root arcs. In the actual design process, the working tooth side and the non-working tooth side can be designed according to the load requirements. During the meshing process of gears, d...

AI Technical Summary

Problems solved by technology

In the manufacture of traditional modified gears, the unmodified gears are generally processed first, and then the modified processing is performed. The processing procedure is complicated, the efficiency is low, and the precision is low, and the later modified processing will destroy the integrity of the gears. The internal flow line is cut off, the strength of the gear will be reduced, and the service life will be shortened

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