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Fitting method of blade surface data

A technology of surface data and airfoil profile, which is applied in the field of aero-engine manufacturing, can solve problems such as inability to meet accuracy, and achieve the effects of improving forming quality, improving precision forging technology, and uniform allowance

Inactive Publication Date: 2014-02-12
SHENYANG LIMING AERO-ENGINE GROUP CORPORATION
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The airfoil profile design is the key in blade process design. The traditional blade profile design method is to calculate and manually adjust the profile data points by technicians. This method can no longer meet the accuracy required by modern processing methods.

Method used

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  • Fitting method of blade surface data
  • Fitting method of blade surface data
  • Fitting method of blade surface data

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Experimental program
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Embodiment Construction

[0021] The present invention will be described in detail below in conjunction with the accompanying drawings.

[0022] Such as figure 1 As shown, the method of determining the center and radius of the intake and exhaust edges is:

[0023] Fit a suitable circle according to the dense points given in the design drawing, and set the center of one of the circles as (x oj ,y oj ), the radius is r j ,(j=1,2,n 0 ), the coordinates of each point on the edge are (x i ,y i ) (i=1,2...,n), then the edge circle that is relatively close to each point must meet the following conditions:

[0024] min 1 ≤ j ≤ n 0 { Σ i = 1 n | ( x i ...

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Abstract

The invention discloses a fitting method of blade surface data. The method comprises the steps of the fixing of centers and radiuses of intake and exhaust sides, the fixing of arcs in polynomial fitting blade body surface and blade surface, and the fixing of the maximum thickness value of the blade body surface. According to the method,The repeated computing amount and the computing time of designers are greatly reduced, the computation of the blade surface data is enabled to be accomplished in seconds, the whole bade development time is shortened by one third, the data accuracy and the jig design accuracy of blade surfaces are improved, the precision forging technology is improved, and the requirements of modern digital machining equipment are met. Blades machined through the fitting method is smooth in solid surfaces, the phenomenon of back which usually occurs in traditional blade bodies manually adjusted can not occur, the blade body profile line of a blade forge piece designed on the basis of the surface is smooth, a final die cavity is not required to be repeatedly repaired, and the forming quality of the blade forge piece is improved.

Description

technical field [0001] The invention relates to the technical field of aero-engine manufacturing, in particular to a fitting method for blade profile data. technical background [0002] The blade is one of the main components of an aero-engine. Its structural shape is complex, and the airfoil profile is mostly an irregular three-dimensional surface. During the process design process, the blade profile data requires technicians to perform a large number of tedious calculations and extract data points. The design cycle Long, repetitive work, and the three-dimensional accuracy of the final blade profile cannot be guaranteed, which seriously restricts the rapid response capability required for engine development. [0003] With the development of precision forging technology, informatization and digital design and manufacturing require changing traditional design methods, reducing the influence of human factors in process design, and improving design accuracy and manufacturing ca...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/50
Inventor 李治华邰清安汪大成关红佗劲红
Owner SHENYANG LIMING AERO-ENGINE GROUP CORPORATION
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