Maximum spring force in a limited space.
Coiled wave springs (CWS) are springs made by coiling flat wires into a continuous wave shape. They are characterized by their ability to achieve stable deflection and exert a large spring force in a limited space.
Features of Coiled Wave Springs
Space-saving and lightweight
Coiled wave springs (CWS) can achieve the required spring force while keeping the height lower than conventional cylindrical compression coil springs.
Reduction in the number of parts
Replacing multiple disc springs and wave washers with coiled wave springs (CWS) reduces the number of parts and also leads to a reduction in assembly time.
Stable load characteristics
Achieving a nearly parallel deflection stabilizes the load, enabling highly precise force control.
Processing example
This comparison shows a compression coil spring and a coiled wave spring (CWS) designed with the same spring constant under no load. The coiled wave spring (CWS) significantly reduces axial height while maintaining equivalent load characteristics, making it effective for compact designs. It is suitable for applications where performance must be ensured in a limited space.
Compression coil spring (left), coiled wave spring (right)
Processing range
| Thickness | t0.1mm～2.0mm |
|---|---|
| Plate width | w0.5mm～20mm |
| Outer diameter | φ5mm～120mm |
| 自由長 | 1mm ~ 50mm |
| Material | SUS, SWP |
* The minimum and maximum processing range will vary depending on the material, plate thickness, plate width size, and ratio.
Resources
Collaborative research with educational institutions
To move away from in-house development and towards open innovation that leverages external technologies and ideas, we are conducting joint research with educational institutions. In our spring division, we are researching the load characteristics of coiled wave springs (CWS) and striving to provide our customers with faster design support.
Stress distribution under load
Figure showing the finite element analysis results (VonMises stress distribution) when a 90N load is applied to the specifications listed in the processing examples.
Load characteristics
While compression coil springs yield load values close to theoretical calculations, coiled wave springs (CWS) may exhibit discrepancies between theoretical and measured values.
We are working on research to provide our customers with theoretical values that are closer to actual measurements as quickly as possible.
Use applications
| Automotive | Automotive steering system (EPS) / Seat belt components / Seats |
|---|---|
| Transportation equipment related | Shinkansen bogie brake / Bicycle |
| Mobility related | Drone |
| Leisure-related | Fishing tackle |
Spring Design Explanation
This guide explains the basic symbols used in spring design, the formulas employed, and the points that must be considered during manufacturing.
FAQ
Is there a formula for calculating the performance of a coiled wave spring (CWS)?
While we have a formula for calculating the performance of coiled wave springs (CWS), it is not publicly available. We will propose specifications from our company.
Please tell me about the price.
While coiled wave springs (CWS) tend to be more expensive than compression springs, adopting them allows for more compact surrounding components, which can lead to a reduction in the overall product cost.
When comparing compression springs (polished) and coiled wave springs (CWS) in lots of 10,000 units, the prices are equivalent.
What materials can you handle?
Since round wire is rolled to create flat wire, it works similarly to a typical compression spring. (SUS, SWP)
What are the possible sizes for production?
Plate thickness t0.1~2.0 Plate width W0.5~20 Outer diameter φ5~120 Free length 1~50
The minimum and maximum processing range varies depending on the material, plate thickness, plate width size, and ratio.
What is the estimated delivery time?
We will respond after receiving information such as shape, material, and quantity.
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