Today the variety of springs existing in the market is huge because of the diverse applications of these details. Regardless of the type of spring you need for your project or repair, manufacturers promise to provide you with the right spring. This article is dedicated to the compression springs, their types, and their most common applications.
Hourglass, conical, and barrel-shaped springs are used in a variety of applications which require a low solid height, lateral stability, or at least resistance to surging. Conical springs are most commonly designed so that each coil nests partially or wholly into an adjacent coil. Professionals explain that solid height of these units can be as low as only one wire diameter. As a rule, rate these springs increase only together with deflection as the number of active coils in the springs decreases progressively while the springs approach solid. Conical springs by varying the pitch can actually be designed to have an absolutely uniform rate. To calculate the rate for conical springs it is important to consider one spring not solely but in a series.
Hourglass, conical, and barrel-shaped springs are most frequently specified where the small end is meant to work over a rod and the large end of them is meant to work in a bore. In this case conical springs offer the great advantage of a reduced solid height if compared to straight standard compression springs.
Some of the most common applications of compression springs, including hourglass, conical, and barrel-shaped springs, are as follows:
Small Solid Height: All three types of compression springs can be designed in a special way so that each active coil will fit within the next coil. It means that the solid height can be absolutely equal to one or two thickness of the wire. Such application of these springs is great and extremely useful if the solid height is limited.
Variable Rate: Experts explain that all compression springs offer either a constant or uniform pitch. Instead of a constant force rate which is a standard feature of regular compression springs, coil springs have an increasing force rate. The larger units of these coils begin to gradually bottom as soon as a force is applied. In case you need to have a uniform rate you can also get a specifically designed variable pitch.
Stability: All three types of compression springs, including hourglass, conical, and barrel-shaped springs, always offer much more lateral stability and significantly lower tendency to buckle than any other regular compression springs.
Vibration: Conical springs, as a particular type of compression springs, have reduced resonance and vibration owing to the fact that they have a uniform pitch and a great increasing natural period of vibration (which is a constant in regular compression springs) as each coil bottoms.
If needed you can also order specifically designed springs with a variable diameter so that the adjacent coils of a spring rub against one another when the process of reflection is in progress during deflection. As a result resistance is increased to resonance phenomena but at the same time they also may shorten the spring’s life because of the wear.