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Method for evaluating gradient of shaft hole part with single reference plane based on rank analysis

A technology of datum plane and inclination, which is applied in the direction of measuring inclination, measuring devices, instruments, etc., can solve problems such as stability, speed, simple form, and sensitive initial value at the same time, so as to achieve industrial possibility, stable method, Effects of Simplified Rating Forms

Pending Publication Date: 2022-01-04
GUILIN UNIV OF ELECTRONIC TECH
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  • Abstract
  • Description
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  • Application Information

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Problems solved by technology

However, this method is very sensitive to the initial value and is not always stable for the geometry evaluation task
[0008] In summary, when the current geometric evaluation method is applied to the inclination of shaft-hole parts with a single datum plane, it cannot be stable, fast and simple in form at the same time.

Method used

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  • Method for evaluating gradient of shaft hole part with single reference plane based on rank analysis
  • Method for evaluating gradient of shaft hole part with single reference plane based on rank analysis
  • Method for evaluating gradient of shaft hole part with single reference plane based on rank analysis

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Embodiment Construction

[0114] The following are specific embodiments of the present invention, with reference to the attached figure 1 with figure 2 The solutions of the present invention are further described, but the present invention is not limited to these examples.

[0115] To evaluate the inclination of a bore shaft part based on a single datum plane, its tolerance design specification is as follows figure 2 shown.

[0116] Step 1: Get the measurement point set of the datum plane { p i} and get the measuring point set of the measured axis { p ' j}as follows:

[0117]

[0118] At this time, the initial key sequence numbers are 2 and 4;

[0119] The position of the upper boundary at this time U for z 2 =0.01617, the lower boundary B for z 4 =-0.02328;

[0120] Get the middle position of the boundary aver=-0.0036;

[0121] build feature row vector set { A i}as follows:

[0122]

[0123] After step 1, proceed to step 2.

[0124] Step 2: According to { p i} build reference s...

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Abstract

The invention belongs to the field of precision measurement and computer application, relates to a method for evaluating a hole shaft part by combining rank analysis and measurement data and particularly relates to a rank analysis-based rapid evaluation method for the gradient of a single reference plane. The method comprises the following steps of 1, acquiring a reference plane measurement point set and a measured element point set, establishing a feature row vector set and a state element set; 2, obtaining an initial key sequence number set; 3, establishing an analysis matrix and an analysis column vector; 4, carrying out rank analysis; 5, determining an optimizing direction; 6, solving a new key point, and updating the coordinates of the measuring point set; 7, judging whether the reference element evaluation meets a qualified condition or not; 8, pre-positioning the measured element point set; 9, updating a real-time state element set; 10, updating a key sequence number set of the tested elements; 11, establishing an analysis matrix and an analysis column vector; 12, carrying out rank analysis; 13, determining an optimizing direction; 14, solving a new key point, and updating coordinates of the measuring point set; and 15, carrying out qualification judgment.

Description

technical field [0001] The present invention belongs to precision metrology and metering The present invention belongs to the field of precision metrology and computer application, and specifically relates to a stable, fast and simple method for evaluating the inclination of shaft and hole parts on a single datum plane based on rank analysis, which can be used on a single datum plane The error qualification detection and evaluation of the inclination of shaft and hole parts, and provide guidance for the improvement of 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. The inclination error of shaft and hole parts on a single datum plane refers to the diameter of the smallest circumscribed cylinder that forms a theoretically correct angle with the datum plane...

Claims

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Application Information

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IPC IPC(8): G01C9/00
CPCG01C9/00
Inventor 黄美发刘振辉罗民宏唐哲敏
Owner GUILIN UNIV OF ELECTRONIC TECH
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