Airfoil Edge Contouring Tool for Restoring Leading-Edge Shape
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Solution Overview
Problem
The edges of airfoils or blades in aircraft engines can become misshapen due to wear, dirt, or other conditions, leading to a loss of aerodynamic efficiency and performance.
Innovation Solution
A method and apparatus for contouring the leading edges of airfoils using customized tools with abrasive materials like sandpaper, where the tools are configured to restore the airfoil's shape to its nominal design, utilizing a locating feature to ensure precise alignment and contouring.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional maintenance is performed on airfoil edges, then wear and degradation are addressed, but aerodynamic efficiency and engine performance deteriorate due to misshapen edges
Solution Approach 1:
The patent replaces conventional mechanical grinding and manual contouring methods with a laser-based system. The laser beam melts and vaporizes material from the airfoil edge, eliminating the need for mechanical contact tools and enabling precise restoration of the designed edge geometry without the limitations of mechanical abrasion
Solution Approach 2:
The patent utilizes controlled laser parameters (power, pulse duration, focal position) to achieve material removal and reshaping. By adjusting these parameters, the system can precisely control the melting and vaporization process to restore the airfoil edge to its original aerodynamic contour
2Manufacturing precision
If precise contouring tools are used to restore airfoil shape, then manufacturing precision improves, but device complexity and implementation difficulty increase
Solution Approach 1:
The patent replaces complex mechanical contouring tools with a laser-based system that uses optical fields instead of mechanical contact. This substitution simplifies the overall system architecture by eliminating mechanical linkages, adjustment mechanisms, and tooling fixtures while achieving superior geometric precision through laser control
Solution Approach 2:
The system uses the airfoil's original designed geometry as a reference template. The laser contouring process replicates the nominal airfoil shape by removing material to match the target geometry, ensuring high manufacturing precision without requiring complex custom tooling for each airfoil variation
3Productivity
If advanced laser systems are implemented for edge contouring, then aerodynamic efficiency is restored, but cost and system complexity increase
Solution Approach 1:
The patent replaces expensive, complex mechanical grinding and contouring equipment with a laser-based system. While laser technology has its own complexity, it eliminates the need for heavy mechanical tooling, manual operation, and extensive setup procedures, ultimately simplifying the manufacturing process and reducing overall system cost
Solution Approach 2:
The laser system is designed to be self-guided using optical sensors and feedback control. The system automatically monitors the airfoil geometry during processing and adjusts laser parameters in real-time to maintain precision, reducing the need for complex external control systems and manual intervention
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The approach effectively restores the aerodynamic efficiency of airfoils by reshaping the leading edges to their ideal form, improving engine performance and reducing fuel consumption, while also being cost-effective and easy to implement.
Implementation Method 1
A tool for contouring an edge of an airfoil, the tool comprising: a main body, comprising: an edge slot, wherein the edge slot is configured to be positioned on an edge of an airfoil; and an engagement surface configured to engage at least one surface of the airfoil when the edge slot receives the edge of the airfoil to orient the edge slot with respect to the edge of the airfoil
Data Source
AI summary
A tool for contouring an airfoil comprises a main body that includes a locator portion and an upper portion. The locator portion includes an engagement surface and the engagement surface is sized and configured to engage an airfoil. The upper portion includes an edge slot sized and configured for placement of an edge of the airfoil into the slot. An abrasive material is applied to the sides of the edge slot. The upper portion and the locator portion are together sized and shaped so that when the edge of the airfoil is disposed in the edge slot and the engagement surface of the locator portion is simultaneously pressed against the airfoil, engagement of the abrasive material with the edge of the airfoil is effective to contour the edge of the airfoil to a preselected and desired shape.


