Manufacture of torsion springs
Made-to-measure torsion springs
A torsion spring generally consists of a helical body with two legs or ends that hook onto two parts, one fixed and one mobile. The torsion spring stores energy when it is twisted, i.e. when torque is applied around its axis. Unlike compression or tension springs, it neither extends nor compresses, but twists.
Typology of torsion springs
Single and double body
There are several types of torsion spring.
- The simple torsion spring is the most common. It consists of a helical body with two arms (or legs) that exert a torque when rotated relative to each other.
- The double torsion spring consists of two single bodies connected at the centre. They can be wound in opposite directions and their outer legs are connected to one or two different elements.
- Spiral torsion springs are specific forms of torsion springs. The wire is wound flat in a spiral, as in a mechanical watch. For more information on spiral springs, see the corresponding page.
Specific features of the torsion spring
Left or right
Depending on the application, torsion springs can be left-handed, right-handed or double. The latter configuration corresponds to two springs (left and right) wound from the same wire. To hold them in place, torsion springs are often mounted on a mandrel, axle or pin, which fits inside the coils.
CGR relies on its STRAIN advanced research laboratory to develop specific technical solutions for complex torsion spring dimensioning and manufacturing problems.
