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2. Specific features of helical compression springs
2.1 Compression spring bases
In addition to the N useful coils used to calculate flexibility (or its inverse, stiffness), the end coils of compression springs, called bases, are shaped to adapt to the system that receives the spring, so that the external force is as close as possible to an axial force, and the spring operates under good conditions.
In a conventional design, the spring is supported on flat cups. In this case, the most common practice is to add a coil with a pitch equal to the wire diameter to each end of the compression spring, known as the close end. Preferred ends are close-coupled and ground, to ensure the correct application of forces. For small springs, grinding is sometimes not possible, so it's best to use close ends (not ground). The...
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Specific features of helical compression springs
Specific features of helical extension springs
Bibliography
Standards and norms
- Heat treatment, alloy and free-cutting steels – part I: unalloyed steels for quenching and tempering. - NF EN ISO 683-1 - Juin 2018
- Heat treatment, alloy and free-cutting steels – Part 2: alloy steels for quenching and tempering. - NF EN ISO 683-2 - Juin 2018
- Heat treatment, alloy and free-cutting steels – Part 3: case-hardening steels. - NF EN ISO 683-3 - Février 2022
- Hot-rolled steels for quenched...
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