Method for determining flexibility error in blade processing
A curvature and blade technology, applied in metal processing, metal processing equipment, manufacturing tools, etc., can solve the problem of ignoring the processing curvature error, and achieve the effect of improving accuracy and reducing the amount of point data calculation.
Active Publication Date: 2014-05-07
HUAZHONG UNIV OF SCI & TECH
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[0005] In addition, judging from the current measurement methods of blade manufacturers, most of them focus on the detection of the blade profile error, ignoring the analysis of the processing curvature error of the blade during the processing process, and the processing curvature of the blade affects the gas flowing through the blade. Mobility conditions, etc. have a significant impact on
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[0032] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.
[0033] Judging from the current measurement methods of blade manufacturers, most of them focus on the detection of the blade profile error, ignoring the analysis of the processing curvature error of the blade during the processing process, and the processing curvature of the blade affects the flow of the gas flowing through the blade. etc. have important influences. Therefore, in the present invention, it is hoped that by devising a new method that is easy to operate, in the process of analyzing and evaluating the machining quality of the blade profile, the results of the curvature error of the bla...
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The invention discloses a method for determining flexibility error in blade processing. The method includes the steps of: acquiring centroids of multiple sections of a blade to be measured, and linking centroids of a first section and a last section to obtain a line Lc; acquiring centroids of multiple sections of a blade design model, and linking centroids of a first section and a last section to obtain a line Ls; respectively calculating a distance dci and a distance dsi from each centroid of the blade measuring model and the blade design model to the line Lc and line Ls; and calculating flexibility error (di=dci-dsi) of each section of the blade to be measured. The invention also discloses a corresponding improved method to accurately obtain centroid of the section. According to the present invention, flexibility error in blade processing can be measured fast, accurately and stably, and the obtained flexibility error results of the profile can be used as indexes for evaluating blade processing quality, thereby improving processing quality of the blade.
Description
technical field [0001] The invention belongs to the technical field of blade processing, and more specifically relates to a method for determining the processing curvature error of a blade. Background technique [0002] Blades are widely used in aviation (such as the overall impeller of aircraft engines), nuclear power (such as steam turbine blades), ships (such as large propeller blades) and other industries that are related to the national economy and people's livelihood. The profile of the blade is generally a complex curved surface, and the processing procedure is relatively complicated. The quality of the profile has a decisive impact on the performance of the engine, and it enjoys the reputation of the "heart" of the aero-engine and steam turbine. As a typical representative of complex curved surface parts, the blade design and manufacturing technology represent the core competitiveness of the national manufacturing industry and are related to national economic constru...
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IPC IPC(8): B21C51/00
Inventor 李文龙尹周平吴谋虎熊有伦
Owner HUAZHONG UNIV OF SCI & TECH