Community Research and Development Information Service - CORDIS

FP7

AMI4BLISK — Result In Brief

Project ID: 296541
Funded under: FP7-JTI
Country: Germany
Domain: Industrial Technologies

Automatic inspection for blisks

Nowadays, critical parts of aero engines are manufactured at different factories in different countries, requiring that their inspection is done in a unified way. For EU-funded researchers, the best way to ensure homogeneity is by automating the evaluation of these parts.
Automatic inspection for blisks
With the growing complexity of aero engines, determining the reliability of critical components like the turbines' bladed disks is becoming more and more demanding. To comply with stringent standards in terms of quality and safety, these so-called blisks are currently checked by specialists for hours. Even the most infinitesimal fracture could diminish the reliability and durability of a component.

The discovered defects are measured down to micrometre scale to obtain a quantitative description. Optical measurement systems provide accurate data on surface defects. State-of-the-art tactile measurement systems are more suitable for inspection because of their lower resolution. Consequently, inspection and precise measurements of blisks are carried out separately.

In the future, all steps will be carried out with a single system developed by the EU-funded project AMI4BLISK (Automated geometrical measurement and visual inspection for blisks). The AMI4BLISK system measures the blisk geometry while also automatically examining it for defects. Reliability of blisk evaluation will thus be greater than what has been achieved until today, bringing with it technical as well as economic benefits for the aerospace industry.

This new solution for automated measuring and visual inspection of blisks consists of two coordinate measuring machines (CMMs) equipped with optical sensors. A measuring probe touches on several hundred points on the blisk, determining the blisk geometry and assessing surface properties. With the aid of a robotic handling system, the blisk is transported to the second CMM that hosts a visual inspection system. This system is outfitted with several cameras and illumination units to ferret out scratches, dips or other defects.

Image processing software collects information in a list regarding the type and exact position of each defect. Optical sensors use these data to classify the detected defects, while also inspecting them in more detail down to the micrometre scale.

AMI4BLISK's innovative solution should allow the European aerospace industry to achieve tighter tolerances and remain ahead of the competition.

Related information

Keywords

Blisks, aero engines, AMI4BLISK, visual inspection, coordinate measuring machines
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