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Blisk linear friction welding repairing method

A technology of linear friction welding and repair method, which is applied in welding equipment, non-electric welding equipment, metal processing equipment, etc., can solve problems such as crack defects, improve the stability of welding process, improve metal flow, and ensure accurate bonding sexual effect

Active Publication Date: 2018-08-07
AVIC BEIJING AERONAUTICAL MFG TECH RES INST
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] In view of the above-mentioned problems such as cracks and defects that are easy to occur after the blade is repaired by welding, the present invention proposes a method for repairing damage to the overall blade disk based on linear friction welding

Method used

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  • Blisk linear friction welding repairing method

Examples

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Embodiment 1

[0033] The first step is to repair the damage of a certain type of fan blade, using CNC milling or wire cutting to cut off the damaged part of the blade, and leave a certain height of the blade root according to the actual situation of the blade and the subsequent process requirements.

[0034] The second step is to use a mechanical three-coordinate measuring machine or an optical scanning device to measure the remaining blade surface, and establish a digital model of the remaining blade root and clamping block.

[0035] The third step is to process the blade root test piece and the clamping block test piece according to the established model. Depending on the blade twist and thickness, the clamping block can have various forms. It can clamp and strengthen the entire blade shape, or only clamp and strengthen the two ends of the blade tip. When only the two ends are strengthened, The clamping block can be directly machined into a V-shaped structure, or it can be a V-shaped stru...

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Abstract

The invention relates to a blisk linear friction welding repairing method. According to the blisk linear friction welding repairing method, clamping blocks attached to blade profiles are adopted to beclamped on the circumferences of residual blade roots, cavities are reserved in the positions, corresponding to the stopping positions where linear friction welding is completed, of the clamping blocks; high-temperature plastic metal is guided to be gathered at the cavities to enable all the welding defects possibly occurring to exist in the outer side of a blade profile area, and the interior quality of repaired blades is ensured; and by combining and adopting a high-frequency and low-amplitude welding method, it is ensured that the interior quality of the repaired blades is reliable, the defects caused by complex change of plastic metal flowing are reduced, and the stability of a welding technology is improved.

Description

technical field [0001] The invention relates to a linear friction welding repair method for an integral blade disc, which belongs to the technical field of welding repair. Background technique [0002] The blisk structure is a new type of structure used in advanced aero-engines. It realizes the integrated structure of blades and discs, which can greatly improve engine efficiency and reduce fuel consumption and emissions. The overall blisk is easy to inhale sand and stones in the airflow or be damaged by other foreign objects during work, because the overall blisk is an integrated structure, which makes it difficult to replace damaged blades. At present, for the repair of the overall blisk damage, there are mainly technical means such as friction welding repair, fusion welding (argon arc welding, electron beam welding, micro-beam plasma welding, etc.), patch repair, and additive repair (laser cladding, etc.). For the case where the blade is damaged in a large area and must b...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23P6/00B23K20/12
CPCB23K20/1225B23P6/002
Inventor 金俊龙张田仓郭德伦陶军
Owner AVIC BEIJING AERONAUTICAL MFG TECH RES INST
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