Rivet Nut Tool Pull-Force Testing With Strain Gauge Feedback
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Solution Overview
Problem
Conventional rivet nut setting tools struggle to accurately adjust the pull force to the required range due to differences in component size and wear, leading to inefficient or damaging rivet nut setting.
Innovation Solution
A portable test instrument equipped with a shell body, a circuit module, and a strain gauge that measures and displays the pull force of the rivet nut setting tool, allowing for precise adjustment of the pull force.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional rivet nut setting tools are used with rough adjustment, then the device complexity is reduced, but the measurement precision of pull force is insufficient
Solution Approach 1:
The patent replaces the conventional mechanical pull force adjustment system with an electronic measurement and control system. A strain gauge converts mechanical pull force into electrical signals, which are then processed by a microcontroller to provide precise digital display and adjustment, achieving high measurement precision while maintaining operational simplicity
Solution Approach 2:
The strain gauge acts as an intermediary element between the rivet nut setting tool and the measurement system. It transforms the mechanical pull force into measurable electrical signals without disrupting the original tool's function, enabling precise measurement while keeping the overall device structure relatively simple
2Reliability
If pull force is increased to ensure setting, then the reliability of rivet nut setting is improved, but object-affected harmful factors increase due to thread damage
Solution Approach 1:
The patent implements a feedback mechanism where the strain gauge continuously monitors the pull force applied during rivet nut setting. The microcontroller processes this data and provides real-time feedback through display and alarm functions, allowing operators to adjust the pull force to the optimal range, ensuring reliable setting while preventing excessive force that could damage the threads
Solution Approach 2:
The system performs preliminary measurement and indication of pull force before the rivet nut setting is complete. By displaying the pull force data in real-time and providing alarm functions when thresholds are exceeded, the system allows for preventive adjustment before damage occurs, ensuring both reliability and prevention of harmful effects
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
Enables accurate measurement and adjustment of the pull force, ensuring effective and safe rivet nut setting by detecting and displaying the force in real-time, preventing damage and ensuring the force is within the required range.
Implementation Method 1
the strain gauge changes a value of a signal transmitted to the circuit module when being forced to deform
Data Source
AI summary
A portable test instrument for a rivet nut setting tool is disclosed, and the portable test instrument includes a shell body, a circuit module disposed in the shell body, and a strain gauge having a part located in the shell body and electrically connected to the circuit module, and a display device. An end of the strain gauge is exposed to the shell body and used to mount with the rivet nut setting tool. The strain gauge can change a value of a signal transmitted to the circuit module when being forced to deform. The display device is disposed on the shell body and electrically connected to the circuit module, and configured to display data measured by the strain gauge.