A method for detection and evaluation of compound position error of spherical hole system

A composite position degree and spherical hole technology, applied in the direction of measuring devices, mechanical measuring devices, mechanical devices, etc., can solve the problems of difficulty in manufacturing, low yield rate, difficulty in ensuring process accuracy, etc., to achieve reduced evaluation errors, high precision, The effect of simple data processing methods
CN106568365BActive Publication Date: 2019-03-05TIANJIN UNIV
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Patent Information

Authority / Receiving Office
CN Β· China
Patent Type
Patents(China)
Current Assignee / Owner
TIANJIN UNIV
Publication Date
2019-03-05

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Abstract

The invention discloses a method for detecting and evaluating a spherical hole composite location degree error, which comprises the steps of respectively calculating the distance between upper and lower limit points on a fitting axis of each hole and an ideal axis, acquiring the maximum distance, and enabling the maximum distance to be multiplied by 2 so as to act as a first error result of the composite location degree error, that is, an absolute location degree error; and acquiring the location of a minimum containing cylinder, sequentially calculating the distance between actual coordinates of all measuring points to an axis of the minimum containing cylinder, finding out the axis location of the minimum containing cylinder through an optimization algorithm, enabling the maximum distance between all of the points to the axis of the minimum containing cylinder to be the minimum, enabling the maximum distance to be multiplied by 2 so as to act as a second error result of the composite location error, that is, a relative location degree error. The method disclosed by the invention solves a problem that a plurality of space variables exist in solving the spherical hole composite location degree error; a relative location degree error between hole groups and a location degree error of each hole relative to the reference in the spherical hole composite location degree can be accurately solved; and an evaluation error in the detection process can be reduced.
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Description

technical field

[0001] The invention relates to the field of geometric error detection and evaluation, in particular to a method for detection and evaluation of compound position error of a spherical hole system. Background technique

[0002] Spherical hole system is a manufacturing process and feature with groups of holes on the spherical surface, which is widely used in parts in the aerospace field. Parts used in aerospace often have important requirements for precision. Due to the difficulty of manufacturing the spherical hole system, it is difficult to guarantee the process accuracy and the yield rate is low, so the inspection has become a necessary link to ensure the working performance of the parts. The detection method of the position degree between the holes of the spherical hole system and the position degree of the hole to other features is the main feature of the present invention. Contents of the invention

[0003] The invention provides a method for detectin...

Claims

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