What is Compression spring?

Compression spring is a spiral spring under axial pressure, the material used in it is mostly circular, but also useful rectangular and multi-strand steel coil, the spring is generally equal pitch, the shape of the compression spring is: Cylindrical, conical, convex and concave shapes and a small number of non-circular, compression spring between the ring and the ring has a certain gap, when the spring is subjected to external load shrinkage deformation, storage deformation energy

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