Blisk flexible grinding and polishing machining process for improving outer surface roughness

A technology of integral blisk and processing technology, which is applied in the direction of grinding workpiece support, metal processing equipment, grinding/polishing equipment, etc., can solve the problems of high surface stress concentration and increased roughness, and achieve improved consistency and reduced Roughness, the effect of avoiding the texture of the knife

Active Publication Date: 2021-10-22
WENZHOU UNIVERSITY
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AI Technical Summary

Problems solved by technology

The joint texture produced by flexible grinding and polishing not only increases the roughness but also leads to high surface stress concentration, which directly becomes the source of fatigue and is one of the important causes of fatigue failure cracks. Therefore, we propose a method to improve the outer surface roughness The flexible grinding and polishing process of the whole blisk is used to solve the above-mentioned problems

Method used

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  • Blisk flexible grinding and polishing machining process for improving outer surface roughness
  • Blisk flexible grinding and polishing machining process for improving outer surface roughness
  • Blisk flexible grinding and polishing machining process for improving outer surface roughness

Examples

Experimental program
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Effect test

Embodiment 1

[0042] refer to Figure 1-6 , a flexible grinding and polishing process of an integral blisk for improving the roughness of the outer surface, comprising the following steps:

[0043] S1. Analysis of the flexible grinding and polishing of the overall blisk: In order to avoid the joint texture of the flexible grinding and polishing, the shape of the flexible abrasive is optimized through theoretical calculation and simulation analysis, so that the abrasive is more suitable for the complex freedom of the overall blisk / blade For grinding and polishing of curved surfaces, through calculation and simulation analysis, the deformation of blisks caused by grinding and polishing is studied, and then the cutting route and tool angle are optimized, so that the actual grinding and polishing route and tool angle are consistent with the overall blisk and blade during processing. The shape of the components is matched, and a parameter coupling prediction model is established for the optimize...

Embodiment 2

[0060] refer to Figure 1-5 , a flexible grinding and polishing process of an integral blisk for improving the roughness of the outer surface, comprising the following steps:

[0061] S1. Analysis of the flexible grinding and polishing of the overall blisk: In order to avoid the cause of the joint texture caused by the flexible grinding and polishing, the shape of the flexible abrasive is optimized through theoretical calculation and simulation analysis, so that the abrasive is more suitable for the complex blisk / blade Grinding and polishing of free-form surfaces, through calculation and simulation analysis, study the deformation of blisks caused by grinding and polishing, and then optimize the cutting route and tool angle, so that the actual grinding and polishing route and tool angle are consistent with the overall blisk and blade during processing The shapes of similar components fit together, and a parameter coupling prediction model is established for the optimized tool s...

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Abstract

The invention belongs to the field of blisk, particularly relates to a blisk flexible grinding and polishing machining process capable of improving the outer surface roughness, and aims to solve the problems that the roughness is increased and very high surface stress concentration is caused due to tool connecting textures generated by existing flexible grinding and polishing, and the tool connecting textures directly become a fatigue source and is one of important reasons for causing fatigue failure cracks. According to the following scheme, the process comprises the following steps that the appearance of a flexible grinding tool is optimized through theoretical calculation and simulation analysis according to the reason for the tool connecting textures generated by flexible grinding and polishing, so that the grinding tool is more suitable for grinding and polishing machining of a blisk/blade type complex free-form surface. According to the process, the shape of the flexible grinding tool is optimized, the feeding path and the tool angle are optimized, a parameter coupling prediction model is established for the optimized tool shape and the feeding path, and the grinding and polishing surface roughness is guaranteed while the tool connecting texture is avoided.

Description

technical field [0001] The invention relates to the technical field of integral blisks, in particular to a flexible grinding and polishing process for improving the roughness of the outer surface of the overall blisk. Background technique [0002] The blisk is a new type of structural part designed to meet the needs of high-performance aeroengines. It integrates the engine rotor blades and discs, eliminating the need for tenons, tenons and locking devices in traditional connections, reducing structural weight and parts. Quantity, to avoid tenon airflow loss, improve aerodynamic efficiency, greatly simplify the engine structure, has been widely used in military and civil aviation engines in various countries. [0003] The overall blisk is the core component of the aero-engine, and its machined surface quality directly affects the performance and reliability of the aero-engine. The joint texture produced by flexible grinding and polishing not only increases the roughness but ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B24B1/00B24B19/14B24B41/06B24B49/00
CPCB24B1/00B24B19/14B24B41/06B24B49/00
Inventor 潘晓铭姚旭凯周少余朱立志王宇刘德
Owner WENZHOU UNIVERSITY
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