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Measuring head pose planning method for blisk three-coordinate measuring machine

A technology of a three-coordinate measuring machine and an integral blisk, which is applied to measuring devices, instruments, geometric CAD, etc., can solve the problems of large randomness of the obstacle avoidance angle of the probe, many times of adjustment of the position and attitude of the probe, and complicated calculation methods. Achieve the effect of short measurement time, guaranteed accuracy and simple calculation method

Active Publication Date: 2021-03-05
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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Problems solved by technology

[0007] The purpose of the present invention is to overcome the large randomness of the obstacle avoidance angle of the probe during the three-coordinate measurement of the overall blisk, the complicated calculation method, and the adjustment of the probe pose during the measurement process Due to the problems of too many times and low measurement efficiency, a method for planning the position and orientation of the probe of the overall blisk three-coordinate measuring machine is proposed

Method used

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  • Measuring head pose planning method for blisk three-coordinate measuring machine
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  • Measuring head pose planning method for blisk three-coordinate measuring machine

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Embodiment Construction

[0040] The present invention will be further described below in conjunction with accompanying drawing and specific embodiment:

[0041] Such as Figure 2 to Figure 6 As shown, a method for extracting sampling points of a three-coordinate measurement blade section provided by the present invention comprises the following steps:

[0042] S1. Import the digital model of the overall blisk into the CAD three-dimensional modeling software, and establish a measurement coordinate system, and coincide the stacking axis of the blade to be measured with the X axis ( figure 2 );

[0043]S2, calculate all measuring cross-section contour lines ( image 3 ); the section outline is represented by NURBS curve:

[0044]

[0045] where p i is the control point, w i is the weight of each control point, N i，k (u) is the k-degree B-spline basis function in the u direction

[0046] S3, respectively calculate the normal vector n of the plane where each section contour line is located, and ...

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Abstract

The invention discloses a measuring head pose planning method of a blisk three-coordinate measuring machine, which is used for solving the problems of complex calculation method and low calculation efficiency in the measuring head pose determination process during the existing blisk three-coordinate measurement. The method comprises the following steps: firstly, obtaining a measuring section contour line and a normal of a plane where the contour line is located, and calculating a rotation angle of a measuring head; and then dividing the section contour line into regions by using the segmentation points, obtaining mark point information at the same section height on the adjacent blades, and determining the inclination angle of the measuring head according to the mark points and the segmentation points on the section curve. According to the method, the complexity of measuring head pose calculation in the three-coordinate measuring process of the blisk is simplified, the measuring head pose calculation efficiency of non-interference measurement is improved, and scientific and reasonable planning of the measuring head pose of the blisk non-interference measurement is effectively achieved.

Description

technical field [0001] The invention belongs to the field of mechanical parts measurement, and in particular belongs to a measuring head pose planning method when a three-coordinate measuring machine is used for non-interferential measurement of a whole blisk. Background technique [0002] With the development of the aviation industry, the requirements for the performance of aero-engines are getting higher and higher. At present, an important parameter of an advanced aero-engine is to have a large thrust-to-weight ratio. To increase the ratio of thrust to its own weight means that the weight of the turbine and compressor has to become smaller. The traditional manufacturing process of turbines and compressors is to connect the individually produced blades to the blisks in a manner of interlocking tenons and tenons. The integral blisk does not need to be connected by the tenon and tenon of the hub and the tenon of the blade, which saves the weight of the connection part and ...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F30/20G06F30/17G01B21/00
CPCG01B21/00
Inventor 黄智赵燎周涛
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA
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