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Five-shaft image measurement device used for measuring film hole shape and position parameters

An image measurement and air film hole technology, which is applied to measurement devices, optical devices, instruments, etc., can solve the problems that the accuracy and repeatability of air film hole measurement results cannot meet the needs of engineering, and achieve high positioning accuracy and high efficiency. , Universal effect

Active Publication Date: 2018-06-19
CHINA PRECISION ENG INST FOR AIRCRAFT IND AVIC
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Problems solved by technology

This makes the accuracy and repeatability of the air film hole measurement results unable to meet the engineering needs

Method used

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  • Five-shaft image measurement device used for measuring film hole shape and position parameters
  • Five-shaft image measurement device used for measuring film hole shape and position parameters
  • Five-shaft image measurement device used for measuring film hole shape and position parameters

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Embodiment Construction

[0023] The technical scheme of the present invention will be described in further detail below in conjunction with accompanying drawing and embodiment:

[0024] See attached Figure 1~4 As shown, this five-axis image measuring device for measuring the shape and position parameters of air film holes is based on the principle of machine vision measurement, and is aimed at the multiple air film hole features 12 distributed on the airfoil profile surface of the hollow turbine blade 10 of the aero-engine. , adopt the lighting method combining backlighting and forward lighting, and use the image acquisition device 6 to collect the digital image of the measured air film hole feature 12, and then obtain the aperture size of each air film hole feature 12 through subsequent image processing , axis space angle and hole center coordinates and other shape parameters. The device has five motion axes, including three linear axes X, Y, and Z and two rotary axes A, B, and can realize five-axi...

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Abstract

The present invention relates to a five-shaft image measurement device used for measuring the film hole shape and position parameters. The five-shaft image measurement device can be used to obtain theshape and position parameters, such as the apertures of the film hole characteristics on a hollow turbine blade in an aero-engine, the axis space angle, the hole central coordinates, etc. thereby really describing the actual state of each film hole, and comprehensively evaluating the processing quality of each film hole. The five-shaft image measurement device of the present invention is based onthe machine vision measurement principle, adopts an illumination mode of combining the backward illumination and the forward illumination, changes the space position and attitude between the measuredhollow turbine blade and an image acquisition device via the linkage of three linear shafts and two rotating shafts, and determines the alignment accuracy of the image acquisition device and the measured film holes based on the shape characteristics of the acquired film hole images. The five-shaft image measurement device of the present invention is compact in structure and high in measurement precision, is convenient to use, and can measure automatically, thereby providing the technical means of detecting the processing quality of the film holes with high precision, high efficiency and highreliability. The five-shaft image measurement device also can be used as a universal five-shaft image measurement device.

Description

technical field [0001] The invention relates to a five-axis image measuring device for measuring shape and position parameters of gas film holes, belonging to the technical field of measurement. Background technique [0002] At present, with the continuous improvement of the performance of aero-engines, the temperature in front of the turbine is getting higher and higher (even has reached 1677°C), which requires that the high-pressure turbine blades at the position with the highest temperature and the most complicated force must have a corresponding temperature tolerance. ability. Therefore, in the design of advanced aero-engines, in addition to the use of high-temperature resistant materials and special heat treatment processes, a large number of cooling air film holes (hereinafter referred to as "air film holes") will be used on the hollow turbine blades. A complete cooling air film is formed on the surface to improve the cooling effect and temperature bearing capacity of...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01B11/12G01B11/27G01B11/00G01B11/24
CPCG01B11/00G01B11/002G01B11/12G01B11/24G01B11/27
Inventor 毕超房建国孙永春鲍晨兴刘勇
Owner CHINA PRECISION ENG INST FOR AIRCRAFT IND AVIC
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