Breakaway Fastener Verification for Consistent Bolt Tension
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Solution Overview
Problem
Existing fastening systems lack efficient and safe methods for ensuring consistent tension across multiple fasteners, particularly in large-scale or hazardous installation sites where manual inspection is time-consuming and risky.
Innovation Solution
A fastening system comprising a structural nut and a breakaway nut, where the breakaway nut is designed to shear off from the structural nut upon reaching a desired tension, allowing for easy verification of proper installation by visual confirmation of the breakaway nut's separation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If manual inspection of fasteners is performed to verify tension, then installation accuracy can be confirmed, but time consumption increases and safety risks arise in hazardous environments
Solution Approach 1:
The fastening system performs self-verification through the breakaway nut mechanism. When the structural nut reaches the desired tension, the breakaway nut automatically shears off, providing visual confirmation that the fastener is properly tightened. This eliminates the need for manual inspection, saving time and removing safety risks in hazardous environments while maintaining verification accuracy.
2Measurement precision
If manual inspection of fasteners is performed to verify tension, then installation accuracy can be confirmed, but labor requirements increase for large numbers of fasteners
Solution Approach 1:
The breakaway nut mechanism provides automatic self-verification for each fastener. Installers simply need to apply torque until the breakaway nut shears off, which visually confirms proper tension. This eliminates the need for separate inspection steps for each fastener, dramatically improving productivity when installing large numbers of fasteners while maintaining verification accuracy.
3Manufacturing precision
If breakaway nut is designed to shear at desired tension, then tension control precision is improved, but device complexity increases due to additional components
Solution Approach 1:
The fastening system is divided into two functional segments: the structural nut that provides the fastening function and the breakaway nut that provides the verification function. The breakaway nut is designed with a specific shear strength that breaks at the desired tension level, providing precise tension control. While this adds a component, the segmentation of functions actually simplifies the overall control mechanism compared to complex tension sensing and reporting systems.
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 enables efficient and safe verification of proper tension across multiple fasteners, reducing the risk of manual inspection in hazardous environments and ensuring consistent tension control.
Implementation Method 1
the breakaway nut is dimensioned and configured to shear apart from the structural nut
Data Source
AI summary
A fastening system for receiving an associated screw for joining parts together to form a structure. The fastening system includes a structural nut and a breakaway nut having a circumference that includes a shape that is configured to be engaged by a hand tool for rotating the breakaway nut. Upon rotation of the breakaway nut with respect to the associated screw, the structural nut is tightened against the structure to a desired tension whereupon the breakaway nut is dimensioned and configured to shear apart from the structural nut.