Manufacture of compression springs
Coiled springs
Compression springs are wound from round or profiled wire to accumulate, store and release force in the axial direction. They are longest when at their free length. They take the form of an open helix, but can also have a conical, elliptical, circular or even rectangular cross-section. Compression springs are the most common type of coiled springs. They are found wherever energy needs to be absorbed or stored.
Conical, concave and convex springs
Compression spring variants
Compression springs can be cylindrical, conical, convex or concave. Conical springs are used in applications where the height of the fully compressed spring must be minimised, such as in buttons and electrical contacts. The rarer convex (barrel) or concave (hourglass) springs offer additional stability to longer springs.
CGR relies on its STRAIN advanced research laboratory to develop specific technical solutions for complex compression spring sizing and manufacturing problems.
Compression spring materials
Treatments and finishes
We manufacture compression springs from all the usual materials, including steel, stainless steel, alloy steels and other more technical materials. After winding, compression springs can undergo various secondary treatments:
- Heat treatments to improve the durability and performance of springs, hot and cold setting or scragging
- Surface treatments to increase corrosion resistance and fatigue life
- Mechanical treatment by grinding, shot-blasting, deburring and cleaning to ensure perfect integration of the spring into its mechanism or sub-assembly.
