Coaxiality error detection and measurement method based on error source

Abstract

The invention relates to a coaxiality error detection and measurement method based on an error source. The invention belongs to the field of precision measurement and computer application, and relates to an optimal measurement point number reasoning method for rapidly and stably marking coaxiality tolerance during cylinder part detection, which is realized by the following steps of: 1, obtaining a size error morphology change function under a specific processing condition; 2, setting H (H is greater than or equal to 3) measuring points on the cross sections of the cylinder part, wherein a total of I cross sections exists, analyzing a size error to compensate the coaxiality tolerance, and obtaining an allowable value increase of the coaxiality tolerance, so as to obtain a shape change function of an actual part; 3, obtaining a simulation function of the measuring point according to the morphology change function of the part; 4, evaluating the coaxiality error to obtain the variable quantity of the average value of the limit equivalent dimensions; 5, if the variation is smaller than 0.001 mm, executing the step 6, otherwise, returning to the step 2; and 6, when the measurement error is less than or equal to the measurement allowance, outputting the number of the finally obtained measurement sections and the number of measurement points, otherwise, increasing the number of the sections and returning to the step 2.

Description

technical field [0001] The invention belongs to the field of precision measurement and computer application, and relates to a fast and stable method for inferring the optimal number of measurement points in the detection of a cylinder part marked with coaxiality and applying the maximum physical requirement (MMR) to both the reference and the measured elements. Measure the coaxiality error of the part in the Coordinate Measuring Machine (CMM) equipment, and provide guidance for the improvement of the part processing and processing technology. Background technique [0002] Coaxiality error is a common positioning tolerance in the inspection of machined parts, and it has important practical significance for its fast and accurate measurement and evaluation. Coordinate Measuring Machine (CMM) is widely used in error detection of machined parts due to its high measurement accuracy and wide measurement range. During the testing process, it is not only necessary to ensure that the...

AI Technical Summary

Problems solved by technology

However, this method has a large number of measuring points, which improves the detection accuracy but increases the measurement cost and reduces the measurement efficiency.

[0004] In summary, there is still a lack of a fast and stable method for inferring the optimal number of measurement points during the detection of cylindrical parts marked with coaxiality tolerances

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