Measuring method of accumulative pitch error of involute cylindrical gear based on machine vision

Abstract

The invention relates to a measuring method for a cumulative error of an involute cylindrical gear tooth pitch based on machine vision, which belongs to the technical field of machine vision measurement. The measuring method for the accumulated error of the involute cylindrical gear tooth pitch based on the machine vision comprises the following steps: firstly, writing a parameter equation of a tooth profile involute by setting a world coordinate system and an imaginary coordinate system; secondly, obtaining a calculation equation of the parameter coordinate of a corresponding point on the tooth profile perpendicular to the detection point by using the relationship between the detection point and the parameter equation of the tooth profile involute in the imaginary coordinate system, thentransforming the calculation equation to the world coordinate system and accordingly establishing a geometric fitting model of the tooth profile involute equation on an X-Y plane of the world coordinate system; and finally, obtaining the cumulative pitch error of an involute cylindrical gear by using the radius of a gear base circle and a starting angle of the tooth profile involute obtained by fitting the involute equation of the tooth profile. According to the invention, by adopting a machine vision measurement technology, and adopting a method of geometrically fitting the involute equationof the tooth profile, the non-contact measurement of the cumulative error of the tooth pitch of the involute cylindrical gear is realized. The measurement process is simplified, and the measurement precision is improved.

Description

technical field [0001] The invention relates to the technical field of machine vision measurement, in particular to a machine vision-based method for measuring the cumulative error of pitch of an involute cylindrical gear. Background technique [0002] Involute cylindrical gears will inevitably undergo some deformations of different degrees during the process of manufacturing, surface heat treatment, etc., resulting in a large cumulative pitch error. If these deformations or errors cannot be effectively and accurately measured, in the subsequent Finishing assembly or in the process of gear transmission will bring various problems, which will directly affect the quality of the product. Therefore, the accurate pitch cumulative error is one of the important indicators to ensure the high precision and high performance of the gear. Accurate and effective measurement of the pitch cumulative error of the involute cylindrical gear is an important process to ensure product quality in...

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to provide a method for measuring the cumulative error of involute cylindrical gear tooth pitch based on machine vision, which solves the problem that the existing application of machine vision technology to measure the cumulative error of involute cylindrical gear tooth pitch is not efficient, the process is cumbersome, Technical issues with poor precision

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