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Reverse correction method for torsion and bending deformation of blisk blade

A technology of bending deformation and integral blisk, which is applied to the details of milling machine equipment, metal processing equipment, milling machine equipment, etc., can solve the problems of failure to consider the influence of torsion and bending deformation on the machining accuracy of blades, achieve small torsion angle deviation, and improve milling Effect of rigidity and small positional deviation

Active Publication Date: 2019-04-09
SHENYANG LIMING AERO-ENGINE GROUP CORPORATION
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AI Technical Summary

Problems solved by technology

The existing filling materials, segmentation, layering and other processing technologies for integral blisks usually directly generate NC machining programs based on the blade design model, and fail to consider the torsion and bending deformation of the processed surface during top-down processing. Influence of machining accuracy

Method used

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  • Reverse correction method for torsion and bending deformation of blisk blade
  • Reverse correction method for torsion and bending deformation of blisk blade
  • Reverse correction method for torsion and bending deformation of blisk blade

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Experimental program
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Embodiment Construction

[0035] Such as Figure 1-5The invention is shown for controlling the torsional and bending deformation of a blisk during milling. The overall blisk blade is made of titanium alloy material with relatively low hardness, the blade span length is 133mm, the minimum distance between adjacent blades is about 18mm, and the front and rear edges R is 1.2mm. 7 to blade section S 21 Can be tested. Proceed as follows:

[0036] Step 1: Analyze the deformation characteristics of the blade;

[0037] The overall blisk blade belongs to the cantilever structure, and there is continuity in the deformation of the blade entity. The blade deformation of the overall blisk has the following characteristics: from the blade root to the blade tip, the torsional deformation of the blade increases gradually, the air intake edge twists to the back side of the blade, and the exhaust edge twists to the blade pot side; the bending deformation of the blade gradually increases. Large, leaf pots curved lat...

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Abstract

The invention discloses a reverse correction method for torsion and bending deformation of a blisk blade. According to the reverse correction method, the torsion and the bending deformation, which arecaused by blade milling processing, are considered in advance; a design model is corrected according to blade profile detection data; a blade process model used for programming is constructed; a rough and fine layered alternate processing strategy is adopted for processing; the blade milling rigidity is enhanced; the torsion angle and the position degree of the blisk blade are enabled to meet thedesign-specified tolerance requirements; the blade processing accuracy and surface quality are improved; and the structure strength and the pneumatic performance of a blisk are guaranteed.

Description

technical field [0001] The invention relates to the technical field of aero-engine integral impeller processing, in particular to a reverse correction method for the torsion and bending deformation of integral blisk blades. Background technique [0002] In order to improve the aerodynamic efficiency and increase the compression ratio, the overall blisk blade gradually adopts a complex blade configuration with characteristics of bending, sweeping and twisting. The overall blisk is prone to large torsion and bending deformation. At the same time, the overall blisk is made of difficult-to-machine materials such as titanium alloy, and the machined surface has a large amount of rebound when milling the blade shape, resulting in increased torsion and bending deformation. During the machining process, it is not only necessary to ensure the machining rigidity of the milling position in real time, but also to consider the torsional deformation and bending deformation caused by exter...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23C3/18
CPCB23C3/18
Inventor 杨万辉韩德印吉时雨杨金发朱静宇
Owner SHENYANG LIMING AERO-ENGINE GROUP CORPORATION
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