Fast simple and stable method for evaluating coaxiality based on double tolerance principle

Abstract

The invention belongs to the field of precision metrology and computer application, and particularly relates to a stable, fast and simple-form coaxiality evaluation method based on a double toleranceprinciple. The method comprises the following steps that step 1, measuring points of to-be-measured parts are used to construct a plurality of parameter matrixes to describe geometric errors of the to-be-measured parts; wherein in step 1.1, it is determined whether to analyze a reference section or a measured section; in step 1.2, parameter matrixes of the reference section and measured segment are merged; step 2, a key point is added; step 3, an analysis matrix is constructed by using a key point set; step 4, the analysis matrix is analyzed to determine whether or not to continue to optimizeand determine an optimization strategy; step 5, an optimization direction is calculated; step 6, it is determined whether or not a new key point is generated, if necessary, a new key point is generated and partial parameter matrixes are updated; and step 7, it is calculated and determined whether or not the coaxiality, based on the double tolerance principle, of the to-be-measured parts 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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