Straightness evaluation method in any direction based on digitized gauge

Abstract

The invention belongs to the field of precision metering and computer application, parts are evaluated by using a physical gauge in the form of a mathematical model, and the invention specifically relates to a digitized straightness evaluation method in any direction, which is fast, stable and simple. The method comprises the steps of: 1: obtaining a measurement point set, and establishing a boundary element set and a state element set according to the measurement point set; 2: establishing a feature row vector set according to the measurement point set and a corresponding normal vector; 3: adding a key point; 4: establishing an analysis matrix and an analysis column vector; 5: performing rank analysis on the analysis matrix and an augmented analysis matrix to determine whether to continueto optimize, remove the key point, or terminate the program; 6: calculating an optimization direction; 7: solving a new key point by a following problem, performing optimization step calculation, performing update according to the formula in the step 1 to enter the next cycle, or entering the next cycle according to the step 4; and 8: terminating the program and obtaining an optimal value.

Description

technical field [0001] The invention belongs to the field of precision measurement and computer application, and relates to a fast, stable, simple-form, digital straightness evaluation method in any direction, which can be used for the qualification detection and evaluation of the axis straightness of the step shaft of the winch equipment, and for its processing Provide guidance for process improvement. Background technique [0002] Shaft and hole parts are relatively common geometric elements in mechanical parts, and their precision has an important impact on product quality, performance and service life, while straightness is the main technical index of shaft and hole parts. According to the national standard GB / T11336-2004 and the ISO standard, the definition and judgment method of straightness in any direction is given, and the evaluation of the straightness error of parts in any direction needs to meet the minimum area condition to obtain better evaluation and verificat...

AI Technical Summary

Problems solved by technology

In the calculation process of these methods, the form of the model is relatively complex and there is randomness, and corresponding methods are required to ensure the stability of the results. When the number of measurement points is large, the calculation efficiency is not high enough to meet the production needs.

[0004] In summary, there is still a lack of a fast, stable, simple form, digital straightness evaluation method in any direction

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