Coaxiality evaluation method based on principles of double tolerances

Abstract

The invention belongs to the field of precision metrology and computer application, in particular to a stable, rapid and simple-form coaxiality evaluation method based on principles of double tolerances. The coaxiality evaluation method comprises the following steps: step 1, constructing a plurality of parameter matrices by measuring points of a to-be-measured part to describe geometric errors ofthe to-be-measured part; step 1.1, determining whether to analyze a reference section or a measured section; step 1.2, combining parameter matrixes of the reference section and the measured section; step 2, adding a key point; step 3, constructing an analysis matrix through a key point set; step 4, analyzing the analysis matrix, deciding whether optimization continues, and deciding optimization strategies; step 5, calculating an optimization direction; step 6, deciding whether a new key point is generated, generating a new key point if necessary, and updating part of the parameter matrixes, and step 7, calculating and judging whether coaxiality of the to-be-measured part based on principles of double tolerances is qualified.

Description

technical field [0001] The invention belongs to the field of precision measurement and computer application, and specifically relates to a stable, fast and simple coaxiality evaluation method based on the double tolerance principle, which can be used for the error qualification detection and evaluation of the coaxiality based on the double tolerance principle. And provide guidance for the improvement of processing technology. Background technique [0002] Dimensional error and shape error (abbreviation of shape error and position error) directly affect product quality, assembly and service life. It is of great significance to quickly and accurately calculate part error. The relationship between dimensional tolerance (tolerance is the allowable range of error) and shape and position tolerance is called the tolerance principle, in which the maximum entity requirement is a tolerance principle that reflects the assemblability of parts, and the minimum entity principle is the one...

AI Technical Summary

Problems solved by technology

However, this method is very sensitive to the initial value and is not always stable for the geometry evaluation task

[0011] To sum up, when the current geometric evaluation method is applied to the coaxiality evaluation based on the dual maximum entity requirements, it cannot be stable, fast and simple in form at the same time.

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