A clamping device for blade profile measurement

A surface measurement and blade technology, applied in the field of blade profile measurement and clamping devices, can solve the problems of low positioning accuracy, low clamping efficiency, manual blade adjustment, etc., achieve high repeat positioning accuracy, improve measurement accuracy, and benchmark accuracy. high effect

Active Publication Date: 2020-05-01
BEIJING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] ①Poor versatility, only specific types of blades can be clamped
[0006] ②Low clamping efficiency
The existing blade clamping scheme mostly adopts the method of screw fastening, and the blade attitude needs to be manually adjusted before measurement
The clamping efficiency is low, and it is difficult to adapt to the requirements of large-scale blade measurement on site
[0007] ③Repeat positioning accuracy is low
The existing blade clamping scheme does not consider the profile characteristics of the blade root, the positioning accuracy is low, and it is difficult to ensure the accuracy of the blade posture
[0008] ④The existing blade clamping scheme does not provide measurement benchmarks, and subsequent coordinate system establishment and data processing are difficult

Method used

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  • A clamping device for blade profile measurement
  • A clamping device for blade profile measurement
  • A clamping device for blade profile measurement

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Experimental program
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Effect test

Embodiment Construction

[0035] The present invention will be described in detail below in conjunction with specific blade measurement cases:

[0036] refer to figure 2 , a clamping device for blade profile measurement, the device is composed of three parts: a mounting column 1, an abutment 2 and a blade pressing plate 3.

[0037] refer to Figure 4 , The mounting column 1 is provided with a support surface a101, a support surface b102, an installation cavity 103 extending into the installation column, a fastening screw 104 and four installation holes a105 for connecting the abutment 2. The mounting column is set on the lower thimble of the rotary platform of the measuring instrument through the mounting cavity to realize the connection between the measuring system and the blade clamping device, and is fixed by the fastening screw 104 on the cavity. In addition, the mounting column also has the function of adjusting the height of the blade and providing a measurement reference.

[0038] refer to ...

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PUM

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Abstract

The present invention discloses a blade profile measurement clamping device. The device comprises an installation column, a base and a blade pressure plate. The device fully considers profile featuresof a blade tenon root, employs an adjustable dovetail groove structure design, and employs a dovetail groove formed between the blade pressure plate and the base to clamp the blade and automaticallyregulate the attitude of the blade. The adjustable dovetail groove structure is the core of the blade profile measurement clamping device so that the location precision and flexibility are greatly improved. The device takes an axial lead of an installation column as a measure reference, so that the problems of subsequent coordinate system establishing and data processing can be solved, and the reference precision is high. The device is simple in structure, uniform in force supply, accurate in location, high in reliability and convenient to clamp and install.

Description

technical field [0001] The invention relates to the technical field of blade profile precision measurement, in particular to a blade profile measurement clamping device. Background technique [0002] The blade is a key part of the aero-engine, and the quality of its profile is directly related to the performance, safety and life of the aero-engine. For proper engine performance, blades must be of precise size, shape and surface integrity. The measurement of blade profile can effectively improve the quality of blade processing, and is of great significance to ensure the power performance and safety of the engine. [0003] Most of the blades are strongly twisted, thin-walled, and free and complex curved surfaces. The surface measurement technology involves many fields and is technically difficult. Among them, the clamping and positioning method of the blade has always been a focus of research on blade profile measurement technology. A reasonable blade clamping method is of ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01B21/00G01B21/20
CPCG01B21/00G01B21/20
Inventor 石照耀李学哲李昱坤王涛
Owner BEIJING UNIV OF TECH
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