Method for calculating part conicity based on minimum zone

A technology of minimum area and calculation method, applied in the direction of measuring devices, instruments, etc., can solve problems such as poor calculation stability, difficulty in applying the minimum area method, and difficulty in achieving calculation results, etc.

Active Publication Date: 2013-09-11
GUILIN UNIV OF ELECTRONIC TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Due to the shortcomings of these methods, such as poor calculation stability, low calculation efficiency, limited number of sampling points, and difficulty in achieving accurate solutions for calculation results, it is difficult to apply the minimum area method in actual detection.

Method used

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  • Method for calculating part conicity based on minimum zone
  • Method for calculating part conicity based on minimum zone
  • Method for calculating part conicity based on minimum zone

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0081] A method for calculating the conicity of parts based on the smallest area, when the cone angle is a variable, mainly includes the following steps:

[0082] Step 1: Place the measured cone on the measurement platform, measure and obtain the measuring points on the surface of the cone in the rectangular coordinate system of the measurement space ,in =1, 2,..., n , n Represents the number of measuring points and is a positive integer greater than 7; all measuring points Form a point set ; Randomly give the initial parameters of the cone, including the apex coordinates of the outer enclosing cone , the direction vector of the cone axis and half cone angle ;in The direction of the vector is from the small end of the cone to the large end; set the allowable value of the error .

[0083] Step 2: Apply the following formula to calculate each measuring point in turn distance to cone ,

[0084]

[0085] in , all measuring points corresponding to Form...

Embodiment 2

[0122] A method for calculating the conicity of parts based on the smallest area. When the cone angle is constant, it is basically similar to the calculation process of Embodiment 1. The difference is that the cone angle is kept constant during the change of the containment area. It mainly includes the following steps:

[0123] Step 1: Place the measured cone on the measurement platform, measure and obtain the measuring points on the surface of the cone in the rectangular coordinate system of the measurement space ,in =1, 2,..., n , n Represents the number of measuring points and is a positive integer greater than 7; all measuring points Form a point set ; Randomly give the initial parameters of the cone, including the apex coordinates of the outer enclosing cone , the direction vector of the cone axis ;According to the drawing information, get the half cone angle ;in The direction of the vector is from the small end of the cone to the large end; set the allowab...

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Abstract

A method for calculating part conicity based on a minimum zone comprises the steps of firstly measuring and obtaining coordinates of measured points on the measured circular conical surface, then providing initial parameters of a cone, inquiring measured points of measured features in contact with an error tolerance zone, performing corresponding translation change, rotation change and size change of the error tolerance zone according to the number and coordinates of contact points, and calculating the change amount of the tolerance zone to sequentially find contact points meeting criterions of the minimum zone. By means of the method, a conicity error optimal value and a cone parameter optimal value can be accurately calculated.

Description

technical field [0001] The invention relates to a method for calculating the conicity of parts based on the smallest area, which belongs to the field of precision measurement and computer application, can be used for the qualification detection of conical elements in geometric products in various situations, and provides for the improvement of the processing process and processing technology. guide. Background technique [0002] Due to the advantages of good alignment, strong sealing, reliable fit, fast and accurate installation and positioning, the conical fit is widely used in mechanical geometric products. In actual production, traditional measuring instruments such as goniometers and cone plug gauges are generally used for qualification inspection. Although these methods are simple and easy to implement, the detection information is too single to meet the requirements of high-precision mechanical products, and there are certain limitations. With the wide application of...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01B21/22
Inventor 陈磊磊钟艳茹孙永厚黄美发匡兵
Owner GUILIN UNIV OF ELECTRONIC TECH
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