FaToBlade Inspection: Safeguarding the Quality of Aircraft Engine Blades (Part II)

3. The "professional scalpel" for blade detection: FaToBlade blade analysis Software

FaToBlade blade analysis software is a core professional module in the three-coordinate measurement and analysis ecosystem independently developed by Depsec Company. It is not merely a simple data processing tool, but a dedicated analysis platform deeply adapted to the inspection requirements of aviation blades. In this platform, the blade scanning module FaToInspect offers flexible measurement solutions: it supports both three-axis and four-axis scanning measurements, as well as four-axis linkage adaptive scanning measurements.

This software closely collaborates with the FaToInspect general measurement software, which already features Gaussian least squares and Chebyshev minimum region fitting algorithms certified by the German PTB, and can seamlessly integrate with CAD data, supporting DMIS and I++ standard protocols. Based on this stable metering base, FaToBlade has further expanded its specialized analysis capabilities for blade profiles, including core functions such as cross-sectional profile evaluation, central arc construction, front and rear edge fitting, torsion and bending analysis. The two work together to form a complete closed loop from measurement path planning, data collection to professional assessment output.

4. Performance Highlights: Directly addressing the core demands of blade detection

Once measurement data is efficiently collected, the true test of analytical capability begins. FaToBlade, a specialized analysis software developed by DePuySco for turbine blades, directly addresses every challenge in aviation blade inspection:

1）Professional Blade Profile Evaluation  

FaToBlade strictly adheres to aerodynamic and geometric definitions of blades, enabling automatic recognition and precise evaluation of key features such as suction side, pressure side, leading edge, and trailing edge. Based on measured point cloud data, the software accurately constructs critical parameters including mid-chord line, chord line, maximum thickness, leading/trailing edge radii, twist angle, and chord angle, then performs high-precision comparisons with theoretical models. It reliably handles both closed and open cross-sections, ensuring stable and consistent analysis performance.

2) Flexible Datum Establishment Strategy  

FaToBlade employs a tiered positioning strategy of "rough datum establishment + fine datum establishment": users can quickly set up coordinate systems using dedicated fixtures for batch inspection, or establish precise datums based on design or process references to minimize system errors. Blade measurement typically involves loading an external coordinate file, followed by secondary coordinate setup or direct measurement according to actual conditions. Alignment methods include blade surface alignment (best-fit with six or more points via iteration, or RPS locking six coordinate data points iteratively) and dovetail alignment (coordinate system established per drawing). Additionally, a six-point iterative method can first be used to build the coordinate system, then feature points such as blade body and mounting plate are selected for best-fit alignment, thereby improving accuracy through utilization of more features.

3) All parameters covering inspection evaluation system of FaToBlade dimension fully cover the key geometric parameters of the blade, including but not limited to:

(1) Blade shape and contour  

(2) Thickness distribution across the section and maximum thickness  

(3) Blade camber and sectional twist  

(4) Inlet edge/outlet edge position and edge radius  

(5) Chord length and chord angle  

(6) Stacking point and stacking axis deviation  

(7) Dimensions of related components such as tenon, tip plate, and mounting plate

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