De-Ice Fairing Bond Fixture for Precise Rotor Blade Bonding
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Solution Overview
Problem
Rotary-wing aircraft rotor blades face challenges in maintaining aerodynamic performance and withstanding high stresses, particularly during the bonding process of de-ice fairings, where existing methods lack precision and consistency in applying pressure.
Innovation Solution
A bond fixture with a first frame and a pivotally coupled second frame, featuring adjustable supporting assemblies with contoured pads, applies localized and constant pressure to the rotor blade and de-ice fairing, ensuring secure bonding by restricting movement and allowing for extended application time with optional heating.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If existing bonding methods are used for de-ice fairings, then the bonding process can be completed, but the pressure application lacks precision and consistency
Solution Approach 1:
The bonding device is segmented into multiple independent frames (first frame, second frame, third frame) that can be positioned and adjusted separately. Each frame carries specific supporting assemblies with pads that contact different portions of the rotor blade, allowing precise localized pressure application without requiring a monolithic complex device.
Solution Approach 2:
The supporting assemblies incorporate adjustable mechanisms that allow dynamic positioning and pressure control. The pads can be moved along the frames and the pressure applied can be adjusted during the bonding process, enabling precise control of bonding conditions while maintaining operational flexibility.
2Stability of the object's composition
If a rigid bonding fixture is used, then structural stability is achieved, but the ability to adapt to different rotor blade configurations is reduced
Solution Approach 1:
The frames and supporting assemblies are designed with movable and adjustable components that allow the fixture to adapt to different rotor blade configurations. The pads can be repositioned along the frames, and the frames themselves can be adjusted in position, providing both stability during bonding and adaptability across different blade designs.
Solution Approach 2:
The bonding device is designed as a universal fixture that can accommodate multiple rotor blade configurations through its adjustable supporting assemblies. The same device can be used across different blade types by repositioning the pads and frames, eliminating the need for multiple specialized fixtures.
3Strength
If pressure is applied during bonding, then bond strength is improved, but inconsistent pressure distribution reduces bonding quality
Solution Approach 1:
The total bonding pressure is distributed through multiple separate pads mounted on different frames. Each pad applies pressure to a specific localized area of the de-ice fairing and rotor blade interface, ensuring uniform pressure distribution across the entire bonding surface rather than concentrating force at single points.
Solution Approach 2:
Each supporting assembly with its pad is designed to apply pressure locally to specific portions of the bonding interface. The pads can be independently adjusted to ensure optimal pressure distribution across different areas, allowing localized optimization of bonding conditions while maintaining overall bond strength.
Data Source
AI summary
A bond fixture includes a first frame defining a chamber configured to receive a leading edge of a rotor blade and a second frame pivotally coupled to the first frame. The second frame is movable between a first position and a second position. In the second position, the second frame restricts movement of the bond fixture relative to the rotor blade. At least one supporting assembly extends from the first frame towards the chamber. The at least one supporting assembly is adjustable to apply a pressure to an adjacent surface of the rotor blade.