Retractable Fastener Insert for Composite Panel Installation
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Solution Overview
Problem
The installation of fastener inserts into composite panels is a labor-intensive and time-consuming process due to the need for manual drilling and varying amounts of potting compound, which can compromise the integrity of the fastener inserts.
Innovation Solution
A fastener insert system with retractable arms that fold inward for installation and extend to secure the insert within the panel, facilitated by an installation tool for automated placement, ensuring secure attachment and consistent potting compound usage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional fastener insert installation techniques are used with holes drilled into the composite panel, then fasteners can be attached to secure components, but the process becomes labor-intensive and time-consuming due to varying amounts of potting compound required for each honeycomb cell exposure
Solution Approach 1:
The fastener insert employs dynamic arms that can transition between retracted and extended configurations. During installation, the arms are retracted to fit within the aperture, then automatically extend to engage with the honeycomb structure, providing adaptive engagement without requiring manual adjustment for each cell configuration
Solution Approach 2:
The fastener insert performs self-positioning and self-securing functions through its automatic arm extension mechanism. When the insert is inserted into the aperture, the arms automatically extend to engage the honeycomb cells, eliminating the need for manual positioning and reducing dependency on operator skill and time
2Adaptability or versatility
If multiple honeycomb cells are exposed due to hole positioning, then fasteners can be attached to various panel locations, but differing amounts of potting compound are required for each location, increasing process complexity and time
Solution Approach 1:
The fastener insert is designed as a universal component that can be installed at any aperture location in the composite panel. The arms are configured to adapt to different honeycomb cell exposures automatically, providing consistent securing functionality regardless of the specific cell configuration encountered at each installation location
Solution Approach 2:
The fastener insert changes its configuration parameter automatically based on the installation conditions. The arms transition from a retracted state during insertion to an extended state during engagement, adapting to varying honeycomb cell exposures without requiring changes in potting compound quantity or application procedure
3Reliability
If arms extend beyond the top face outer dimension, then the fastener insert can engage with the honeycomb structure to secure the fastener, but the arms interfere with the installation process and require precise positioning
Solution Approach 1:
The arms are designed as movable components that transition between retracted and extended configurations. During installation, they remain retracted to clear the aperture opening and facilitate easy insertion, then automatically extend to engage the honeycomb structure for secure fastening, combining ease of installation with reliable engagement
Solution Approach 2:
The arms are pre-configured in a retracted position before installation to eliminate interference during the insertion process. This preliminary retraction allows for easy positioning and insertion of the fastener insert, after which the arms automatically extend to perform the securing function
Data Source
AI summary
Systems and methods provide for the installation of fasteners in a composite panel with a fastener insert. A fastener insert for a composite panel includes a body and a at least three arms extending from the body. The body has a top face and a central hub extending rearward from the top face. The top face has an outer dimension between opposing edges. The arms extend from the central hub on a rear side of the body. In a retracted configuration, the arms are folded inward toward the central hub so that the arms do not extend beyond the outer dimension of the top face. In an extended configuration, the arms extend outward from the central hub beyond the outer dimension of the top face.