Rotary Nutplate Abrasion Assembly for Consistent Faying Surface Cleaning
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Solution Overview
Problem
Existing methods for preparing nutplates, especially for internal surfaces like aircraft or boat hulls, face challenges in cleaning faying surfaces after assembly, leading to unreliable adhesive bonds and potential damage during nut placement.
Innovation Solution
A system comprising abrasion pads and a pressure applicator that rotates to clean faying surfaces of nutplates, ensuring effective contact and pressure application for thorough cleaning, which can be applied to multiple nutplates simultaneously, reducing the need for specialized packaging and enhancing safety.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If traditional manual cleaning methods are used for nutplates, then operators can clean individual nutplates, but the cleaning efficiency is low and consistency is poor
Solution Approach 1:
The system segments the cleaning task by providing individual cleaning stations arranged in a circular pattern around a central axis. Multiple nutplates can be cleaned simultaneously at different stations, with each station having its own abrasion pad and pressure applicator, thereby increasing productivity while maintaining consistent cleaning quality across all stations
Solution Approach 2:
The system employs rotational movement where the pressure applicator rotates about a central axis to bring different cleaning stations into position. This dynamic rotation allows continuous operation with multiple nutplates being cleaned in sequence or parallel, improving both efficiency and consistency through automated cyclic operation
2Productivity
If multiple nutplates are cleaned simultaneously, then productivity increases, but device complexity increases
Solution Approach 1:
The system uses identical cleaning stations repeated in a circular arrangement, where each station performs the same cleaning function. This modular universal design allows multiple nutplates to be cleaned simultaneously using the same proven cleaning mechanism, increasing productivity without proportionally increasing device complexity
Solution Approach 2:
Multiple cleaning stations and pressure applicators are merged into a single rotating assembly that operates as one integrated system. The rotational mechanism combines multiple cleaning operations into a unified cyclic process, enabling batch cleaning while managing system complexity through consolidation
3Reliability
If pressure is applied to ensure thorough cleaning, then cleaning effectiveness improves, but risk of damaging nutplates increases
Solution Approach 1:
The system applies pressure locally at each cleaning station through individually controlled pressure applicators that contact only the faying surface of each nutplate. This localized pressure application ensures thorough cleaning of the adhesive surface while minimizing the risk of damage to other parts of the nutplate structure
Solution Approach 2:
The system performs preliminary cleaning of the faying surface before adhesive application by removing contaminants through controlled abrasion. This preliminary action ensures the surface is properly prepared for bonding without requiring excessive pressure that could damage the nutplate, thereby improving reliability while reducing harm
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 system achieves cleaner nutplates with stronger adhesive bonds, increases efficiency and consistency in cleaning, allows for safer operation, and reduces waste and costs by enabling efficient cleaning of multiple nutplates at once, including those contaminated or dropped.
Implementation Method 1
cleaning the nutplates includes abrading each of the faying surfaces with at least one of the one or more abrasion pads
Data Source
AI summary
A system includes an abrasion assembly containing one or more abrasion pads configured to clean a faying surface of multiple nutplates, and a shaft attached to at least one of the abrasion pads and configured to rotate some or all of the abrasion pads during cleaning, wherein cleaning includes abrading the faying surfaces with the abrasion pads. The system also includes a base configured to attach to a pressure applicator, and a pressure applicator configured to attach to the base, hold the nutplates such that the faying surface of each nutplate is capable of contacting one of the abrasion pads, and apply pressure to the nutplates such that each of the nutplates contact one of the abrasion pads during the cleaning. Furthermore, the abrasion assembly is configured to rotate the abrasion pads within at least one of the base and the pressure applicator during cleaning.