Evaluation method of sphericity error based on error sphere

An error evaluation and error sphere technology, which is applied in the field of spherical error evaluation based on error spheres, can solve the problems of not meeting the minimum area conditions, not being accurate enough, and premature, etc., to speed up the evaluation speed, avoid calculations, and improve efficiency.
CN104482911BActive Publication Date: 2017-08-11YANSHAN UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
YANSHAN UNIV
Publication Date
2017-08-11

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Abstract

The invention discloses a sphericity error evaluation method based on error balls. The sphericity error evaluation method comprises the following steps: I, obtaining coordinates and initial data of a measuring point; II, determining an optimization region; III, setting evaluation precision epsilon; IV, calculating coordinates of datum points; V, calculating the sphericity error corresponding to each datum point, and calculating the smallest sphericity error Emin of this iteration and coordinates Omin of the datum point on which the smallest sphericity error Emin is located; VI, ending judgment and outputting results. According to the sphericity error evaluation method based on error balls disclosed by the invention, the dividing process is simplified, the calculation of redundant points is reduced, the efficiency is improved, and the sphericity errors and parameters of the smallest region condition under the set evaluation precision can be obtained.
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Description

technical field

[0001] The invention relates to a precision spherical surface detection technology, in particular to a spherical error evaluation method based on an error sphere. Background technique

[0002] With the development of modern technology, the spherical precision of spherical parts is increasingly required in the fields of aerospace, precision instruments and medical machinery. This puts forward higher requirements for the scientific evaluation of sphericity error. However, there is no clear standard for the evaluation of sphericity error at home and abroad. Therefore, it is of great significance to carry out research on related theories and methods.

[0003] At present, the general evaluation methods for sphericity error evaluation are: least square method, minimum area method, minimum circumscribed sphere method and maximum inscribed sphere method. Among them, the evaluation accuracy of the minimum circumscribed sphere method and the maximum inscribed sphere ...

Claims

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