What is Coil Spring
A
Coil spring, also known as a
helical spring, is a mechanical device, which is typically used to store energy and subsequently release it, to absorb shock, or to maintain a force between contacting surfaces. They are made of an
elastic material formed into the shape of a
helix which returns to its natural length when unloaded.
Coil springs are a special type of
torsion spring: the material of the
spring acts in torsion when the spring is compressed or extended.
Metal coil springs are made by winding a wire around a shaped former - a cylinder is used to form cylindrical coil springs.
The two usual types of coil spring are:
- Tension coil springs, designed to resist stretching. They usually have a hook or eye form at each end for attachment.
- Compression coil springs, designed to resist being compressed. A typical use for compression coil springs is in car suspension systems.
Many types of coil spring are wound in an
annealed (soft) condition and then
tempered to achieve their strength as a spring. Over time, this tempering can be lost
[citation needed] and the spring will
sag because it can no longer withstand the loads applied. Such springs can be
re-set by annealing, returning to their original length (or deliberately setting them to a different length) and then re-tempering. Damage to springs, such as using
oxy-acetylene to cut the end off a car suspension spring to lower a vehicle's
ride height, can destroy the tempering in localised areas of the spring.
Sumber dari WIKIPEDIA....
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