Method for quickly evaluating location degree of single-datum-hole-based shaft part

Abstract

The invention belongs to the field of precision measurement and computer application, relates to a mode of combining a virtual gauge with measurement data in the form of a mathematical model to evaluate a hole shaft part, and particularly relates to a method for quickly evaluating location degree based on single-datum. The method comprises the following steps: 1, acquiring a benchmark section measurement point set, and establishing a characteristic row vector set and a state element set; 2, adding into a key point set; 3, establishing an analysis matrix and an analysis column vector; 4, performing rank analysis; 5, obtaining an optimization direction; 6, solving a new key point, and updating the states of the reference segment point set and the measured element point set; 7, judging whether the reference element evaluation is qualified or not; 8, pre-positioning the measured point set; and 9, updating the real-time state set of the measured elements; 10, taking key points, and adding serial numbers of the key points into the key point set; 11, establishing an analysis matrix and an analysis column vector; 12, performing rank analysis on the analysis matrix and the augmented analysis matrix; 13, determining an optimization direction; 14, obtaining new key points, and updating the point set state; and 15, calculating a position error, and judging the qualification.

Description

technical field [0001] The invention belongs to the field of precision measurement and computer application, and specifically relates to a method for quickly evaluating the position degree based on a single reference, which can be used for the error evaluation of the position degree of the hole shaft parts, and judge the qualified position of the hole shaft parts, and the evaluation result can be used for processing technology. Improve guidance. 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 position error is aimed at the relative position of a part's related geometric parameters, which has a great influence on the use function of the machine part. In order to meet the use requirements of the parts, ensure the interchangeability of the parts and the economy of manufacturi...

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

[0013] To sum up, when the current geometric evaluation method is applied to the error evaluation of the position degree of the hole and shaft parts, based on a single datum, it cannot be accurate, precise, fast and simple in form at the same time.

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