Spring Characteristics Adjustment via Load-Displacement Control
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Solution Overview
Problem
Existing methods for adjusting spring characteristics fail to accurately account for individual variations in both the elastic and plastic regions of a spring, leading to incomplete adjustment of load-displacement characteristics.
Innovation Solution
A method that involves measuring the load-displacement characteristics of a spring by changing the applied load and displacement until a target line is met, allowing for accurate adjustment of spring characteristics by considering both elastic and plastic regions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If spring characteristics are adjusted based on load value measured prior to prestressing (in elastic region), then the adjustment process is simple, but the adjustment accuracy is insufficient because individual variations in plastic region characteristics are not considered
Solution Approach 1:
The invention changes the measurement parameters from only elastic region load values to load-displacement characteristics spanning both elastic and plastic regions. By measuring displacement in addition to load and tracking characteristics through the plastic region, the system captures individual spring variations that were previously undetected, thereby improving adjustment accuracy without significantly complicating the process
Solution Approach 2:
The invention replaces the traditional mechanical prestressing adjustment method (based solely on load measurements) with a measurement-based control system that uses load-displacement characteristic data. This substitution enables precise control of spring characteristics by comparing measured characteristics against target characteristics and adjusting accordingly
2Ease of manufacture
If spring characteristics are adjusted based on spring constant obtained prior to prestressing, then the adjustment method is straightforward, but the individual variations in both elastic and plastic regions cannot be fully accounted for
Solution Approach 1:
The invention segments the spring characteristic measurement into distinct regions (elastic region and plastic region) rather than relying on a single spring constant value. By dividing the measurement into multiple characteristic points across different deformation regions, the system captures the complete load-displacement behavior and individual variations in both regions
Solution Approach 2:
The invention adds the displacement dimension to the traditional load-based measurement approach. Instead of measuring only load or spring constant, the system measures both load and displacement to define load-displacement characteristics, creating a two-dimensional measurement space that fully characterizes spring behavior across elastic and plastic regions
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
This method ensures precise adjustment of spring characteristics by measuring and adjusting load-displacement characteristics in both elastic and plastic regions, resulting in accurate achievement of desired spring characteristics.
Implementation Method 1
a process for applying a compression load in an operation direction of a spring and plastically deforming the spring
Implementation Method 2
The spring characteristics ('load-displacement' characteristics) of a formed spring vary individually in both the elastic region and the plastic region
Data Source
AI summary
The present application provides a method for adjusting spring characteristics of a spring to desired spring characteristics. In the adjusting method of the present application, first, the spring is compressed until a “load-displacement” measurement line obtained by measuring the load applied to the spring and the displacement of the spring meets a “load-displacement” target line determined based on “load-displacement” characteristics of the spring and the desired spring characteristics (S10-S14). Next, the spring is expanded such that the load applied to the spring decreases along the “load-displacement” target line (S18).