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Non-contact optical precision measurement method for small modulus arc gears

An arc gear, optical precision technology, applied in the field of precision measurement, can solve the problems of geometric parameter pitch deviation, difficult measurement, maximum tooth thickness deviation and so on

Active Publication Date: 2016-04-06
BEIJING INSTITUTE OF TECHNOLOGYGY
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Problems solved by technology

[0004] The purpose of the present invention is: in order to solve the problem that it is difficult to measure the basic parameters, geometric parameters, tooth pitch deviation, tooth profile deviation and maximum tooth thickness deviation of arc gears whose modulus is below 0.2 mm and whose addendum circle diameter is below 2 mm, it is proposed A method for non-contact optical precision measurement

Method used

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  • Non-contact optical precision measurement method for small modulus arc gears
  • Non-contact optical precision measurement method for small modulus arc gears
  • Non-contact optical precision measurement method for small modulus arc gears

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Embodiment Construction

[0065] See attached figure 1 , a non-contact optical precision measurement method for small modulus arc gears, the steps are as follows:

[0066] Step 1, collecting microscopic images of small modulus arc gears;

[0067] Use the machine vision detection system to collect the microscopic image of the small modulus arc gear. The machine vision detection system includes a mobile platform in the three directions of X, Y and Z, which can realize the precise positioning of the detection object; when collecting, the small module The digital arc gear is placed on the inspection platform, and by adjusting the moving platform in the three directions of X, Y, and Z, the small modulus arc gear can be clearly imaged within the field of view of the camera, the image is collected, and the captured picture is saved;

[0068] See attached figure 2 , step two, using the BP neural network algorithm to automatically and accurately identify the edge of the small modulus arc gear image;

[0069...

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Abstract

The invention belongs to the technical field of fine measurement, and in particular relates to a small module arc gear measurement method. According to the technical scheme, the small module arc gear non-contact optical fine measurement method comprises the steps that a microscopic image of a small module arc gear is collected; the image edge of the small module arc gear is accurately identified; by using a least square circle method, the geometric center of the small module arc gear is fit; by using a maximum inscribed circle method, the center hole assembly center of the small module arc gear is fit; by using a polar coordinate system, the tooth pitch deviation of the small module arc gear is measured; by using a segmentation measurement method, the tooth profile deviation of the small module arc gear is measured; and the maximum tooth thickness deviation of the small module arc gear is measured. According to the method, the problem that the basic parameters, the geometry parameters, the tooth pitch deviation, the tooth profile deviation and the maximum tooth thickness deviation of the arc gear are difficultly measured is solved, wherein the module of the arc gear is below 0.2mm, and the tip diameter is below 2mm.

Description

technical field [0001] The invention belongs to the technical field of precision measurement, and in particular relates to a method for measuring small modulus arc gears. Background technique [0002] With the rapid development of micro-manufacturing technology, small-modulus arc gears with a modulus of less than 0.2mm and a diameter of the addendum circle of less than 2mm are widely used in weaponry such as micro-miniature fuzes, micro-miniature transmission mechanisms, and micro-miniature aircraft. This puts forward high precision requirements for the processing, assembly and testing of small modulus arc gears. Among them, the detection of the outer dimension of small modulus arc gears has always been a difficult point in the detection of small modulus arc gears. , not only is it difficult for the probe to enter between the teeth, the measurement operation is difficult, and the teeth will be collided and damaged if you are not careful; in addition, the rigidity of the mea...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01B11/14G01B11/24G01B11/06
Inventor 张之敬金鑫叶鑫陆钧程旭
Owner BEIJING INSTITUTE OF TECHNOLOGYGY
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