Virtual detection method for tooth error of involute bevel gear model

Abstract

The invention relates to a virtual detection method for a tooth error of an involute bevel gear model. For a pair of gear models assembled together, the contact area of the pair of the gears is obtained through Boolean minus operation by simulating the engaging process of the pair of the gear models, utilizing the characteristic that an engagement surface and the base circle of a bevel gear are kept in tangency all the time and perform the movement of pure rolling, and utilizing an X-section function of Pro / E software. Because the contact lines of the gears are on the internal common tangent surface of two base cylinders all the time and are parallel to the cross line of the internal common tangent surface and an involute spiral surface, the distance between the contact lines of the pair of the bevel gears can be measured on the engagement surface by utilizing the measurement function of the Pro / E software. For a gear pair model with small tooth error and high precision, the spacing fluctuation of the contact lines of a large gear and a small gear of the gear pair model is small, namely the two contact lines are approximate parallel lines. By the method, the tooth error can be analyzed and judged in a gear modeling stage, so that the failure of computer aided education (CAE) analysis caused by the inefficiency of the model precision in a later stage is avoided.

Description

technical field [0001] The invention relates to a method for detecting the tooth shape accuracy of a virtual prototype model of an involute helical gear, in particular to a method for detecting the tooth shape accuracy of a model using CAE technology. Background technique [0002] At present, the gear engineering analysis and prediction technology with CAE technology as the core is more and more widely used. Represented by helical gears, CAE technology can be used to quickly and accurately simulate and analyze the deformation and stress distribution of the gear teeth and the wheel body under the condition of meshing multiple tooth pairs at any instant and at the same time. The first prerequisite for the application of the above analysis technology is to establish Accurate gear model, otherwise there will be a series of problems such as tooth surface interference, which will affect the accuracy of the analysis results. [0003] In the past, people thought that the digital th...

AI Technical Summary

Problems solved by technology

[0004] The present invention aims to solve the technical problem of virtual detection of gear precision, especially tooth profile error, in the stage of gear design, and provides a virtual detection method of tooth profile error of involute helical gear model

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