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A reverse correction method for torsion and bending deformation of integral blisk blades

A bending deformation, integral blisk technology, applied in metal processing equipment, milling machine equipment, manufacturing tools, etc., can solve the problem of failure to consider the influence of torsion and bending deformation blade machining accuracy, achieve small torsion angle deviation, reduce machining Deformation, the effect of improving the rigidity of milling

Active Publication Date: 2020-04-24
SHENYANG LIMING AERO-ENGINE GROUP CORPORATION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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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  • A reverse correction method for torsion and bending deformation of integral blisk blades
  • A reverse correction method for torsion and bending deformation of integral blisk blades
  • A reverse correction method for torsion and bending deformation of integral blisk blades

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Experimental program
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Embodiment Construction

[0035] Such as Figure 1-5 The invention shown is used to control the torsion and bending deformation of a blisk in the milling process. The integral blisk blade is made of titanium alloy material with lower hardness, the blade span length is 133mm, the minimum distance between adjacent blades is about 18mm, and the front and rear edges R are 1.2mm. From the blade section S 7 To blade section S 21 Can be tested. Proceed as follows:

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

[0037] The overall blisk blade is a cantilever structure, and the blade body deformation has continuity. The deformation of the integral blisk blade has the following characteristics: from the root to the tip of the blade, the torsional deformation of the blade gradually increases, the intake side twists to the back side of the blade, and the exhaust side twists to the leaf bowl side; the bending deformation of the blade gradually increases. Large, the leaf pots are curved laterally t...

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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 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 the characteristics of bending, sweeping, and twisting. The blade presents the structural characteristics of a long cantilever, a large twist, and a combination of bending and sweeping. During the milling process The blisk is prone to large twisting and bending deformation. At the same time, the integral blisk is made of difficult-to-machine materials such as titanium alloy, and the machined surface has a large springback when milling the blade shape, resulting in increased torsion and bending deformation. During the machining process, it is not only necessary to ensure the mac...

Claims

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Application Information

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Patent Type & Authority Patents(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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