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Quick, stable and simple roundness error evaluation method

A roundness error and element technology, which is applied in the fields of precision measurement and computer applications, can solve the problems of sensitivity to initial values ​​and lack of roundness error evaluation methods.

Inactive Publication Date: 2018-06-15
唐哲敏
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, this method is very sensitive to the initial value and cannot always complete the roundness error evaluation task stably
[0008] To sum up, there is still a lack of a stable, fast and simple roundness error evaluation method

Method used

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  • Quick, stable and simple roundness error evaluation method
  • Quick, stable and simple roundness error evaluation method

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Embodiment Construction

[0044] The following are specific embodiments of the present invention, and the solutions of the present invention will be further described with reference to the accompanying drawings, but the present invention is not limited to these embodiments.

[0045] assessment_point_set{ p i} roundness error.

[0046] Step 1: get point set { p i}as follows:

[0047]

[0048] build state element set { t 𝛼}as follows:

[0049]

[0050] build feature row vector set { A 𝛼}, 𝛼 = i Time,{ A i}as follows:

[0051]

[0052] 𝛼 = i At +10, A i+10 =- A i .

[0053] build-boundary-element-set { b 𝛼}as follows:

[0054] { b 𝛼}=[1,1,1,1,1,1,1,1,1,1, 1,1,1,1,1,1,1,1,1,1] T .

[0055] After step 1, proceed to step 2.

[0056] Step 2: Take t i minimum value t min,in The corresponding serial number 6 is the key serial number, and 6 is added to the key serial number set { l} in; take t i+10 maximum value t max,out The corresponding serial number 12 is the key...

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Abstract

The invention belongs to the precision measurement and computer application field and relates to a stable, quick and simple roundness error evaluation method. The method comprises the following stepsthat: step 1, a test point set is obtained, and a feature row vector set, a boundary element set and a state element set are established according to the test point set; step 2, a test point corresponding to the minimum value of the state element set is selected as a key point, and the test point serial number of the key point is added to a key point set; step 3, an analysis matrix and an analysiscolumn vector are established according to the key point set; step 4, rank analysis is performed on the analysis matrix and an augmented analysis matrix, so that continuing optimization, eliminatingthe key point, or terminating a program is determined, and an optimal value is obtained; step 5, the analysis matrix and the analysis column vector are solved, so that an optimization direction is obtained; step 6, a new key point is solved with a catch-up question, and a test point state set is updated, and the method enters a next cycle; and step 7, the program is terminated, and an optimal value is obtained.

Description

technical field [0001] The invention belongs to the field of precision measurement and computer application, and relates to a stable, rapid and simple roundness error evaluation method, which can be used for the evaluation of the roundness error of parts with a rotary body structure, and improves its processing technology Provide 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 definition and judgment method of roundness error are given in the national standard and ISO standard, but the method of calculating the roundness error value from the measurement data is not given. At present, the evaluation method of roundness error is a research hotspot in the academic circle, which is mainly divided into the following five types of evaluation methods. [0003] The firs...

Claims

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Application Information

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IPC IPC(8): G01B21/20
CPCG01B21/20
Inventor 唐哲敏黄美发
Owner 唐哲敏
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