Method for evaluating straightness in given plane based on digital gauge

A straightness and baseline technology, applied in electrical digital data processing, special data processing applications, instruments, etc., can solve problems such as low computational efficiency, complex model form, and inability to meet production needs.
CN110457752AInactive Publication Date: 2019-11-15GUILIN UNIV OF ELECTRONIC TECH
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Patent Information

Authority / Receiving Office
CN Β· China
Current Assignee / Owner
GUILIN UNIV OF ELECTRONIC TECH
Publication Date
2019-11-15
Estimated Expiration
Not applicable Β· inactive patent

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Abstract

The invention belongs to the field of precision metering and computer application and discloses a method for evaluating a part by combining an entity gauge with measurement data in a mathematical model form, and relates to a quick, stable, simple-form and digital method for evaluating straightness in a given plane, which comprises the following steps of: step 1, acquiring a measurement point set,and establishing a boundary element set and a state element set according to the measurement point set; step 2, establishing a feature row vector set according to the measuring point set and the corresponding normal vector; step 3, adding a key point; step 4, establishing an analysis matrix and an analysis column vector; step 5, rank analysis is performed on the analysis matrix and the augmented analysis matrix so as to determine whether optimization continues to be performed, key points are eliminated or a program is terminated; step 6, calculating an optimization direction; step 7, solving anew key point by using a chasing problem, performing optimization step calculation, updating according to the formula in the step 1, and entering the next cycle; or entering the next cycle accordingto the step 4; and step 8, terminating the program and obtaining an optimal value.
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Description

technical field

[0001] The invention belongs to the field of precision measurement and computer application, and relates to a fast, stable, simple and digital method for evaluating straightness in a given plane, which can be used for evaluating the straightness error in a given plane of a guide rail surface in a numerically controlled machine tool. And provide guidance for the improvement of parts processing and 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. According to the national standard GB / T 11336-2004 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 verifi...

Claims

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