Geometrical tolerance measuring instrument for shafts based on projection imaging

Abstract

The invention belongs to the related field of geometrical tolerance measuring instruments, and discloses a geometrical tolerance measuring instrument for shafts based on projection imaging. The instrument comprises a base, a rotating bracket, a light source generating device and an imaging detecting device, wherein the light source generating device and the imaging detecting device are mounted onthe rotating bracket, and the base is used for achieving support and parallel fine adjustment of the entire device; the rotating bracket achieves the consistent free rotation of the light source generating device and the imaging detecting device; the light source generating device is used for emitting parallel light to the imaging detecting device and calibrating the position of the device; the imaging detecting device achieves the collection of shaft projection images and the measurement of a geometrical tolerance. The invention further discloses a corresponding geometrical tolerance measuring algorithm for the shafts and a corresponding parameter calculation formula for increasing assembly precision. By means of the instrument, the parallelism measurement of the shafts can be more conveniently and accurately achieved, and a measurement index of the geometrical tolerance of the shafts is given to guide the installation of the shafts.

Description

technical field [0001] The invention belongs to the related field of shape and position tolerance measuring instruments, and more particularly relates to a shaft shape and position tolerance measuring instrument based on projection imaging. Background technique [0002] With the continuous advancement of industry, society needs more and more new equipment. These equipment, especially for special equipment, need to be processed to form the actual shape or mutual position of the points, lines, and surfaces that constitute the geometric characteristics of the parts. The measurement of the difference between the specified shape and the mutual position of the geometry, that is, the geometric tolerance measurement. To ensure the processing quality and service life of the equipment, it is necessary to improve the assembly accuracy of the entire mechanical equipment. The assembly accuracy not only depends on the processing accuracy of the parts, but also depends on the assembly met...

AI Technical Summary

Problems solved by technology

However, in actual operation, the relevant measuring instruments usually only have simple feedback of parallelism and perpendicularity data, and there is no feedback data on how to improve parallelism and perpendicularity, and the measurement accuracy is still insufficient, which can only be achieved through repeated trial and error. Satisfy the corresponding geometric tolerance

This assembly method has a lot of randomness, which is often directly related to the experience of the assembly workers.

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