Testing tensile
spring load the Fs, is will spring allowed to carry the load as a test load;
Stress, tau s is allowed on the spring loaded big stress as a stress test.
But, there will be a deviation in the specific detection, so attention should be paid to the selection of measuring tools and limit deviation of consideration.
In addition, on the basis of load measurement, but also pay attention to the spring stiffness measurement, also is the point at which the deformation per unit load change.
Tensile spring (
Also called
torsion spring, tension spring)
Is under axial tension spring, tension spring are generally made of material with circular cross section.
When not under load, tensile spring between the circle and circle are generally no clearance and tight.
as compression spring, tension spring is also absorb and store energy.
But I don't like the compression spring most of the tensile spring usually under a certain degree of tension, even in the absence of any load.
This determines the initial tension in the absence of any load, tensile spring coiling of the close degree.
Formula:
spring constant: to k said, when the spring is stretched, each additional load (1 mm distance
kgf /毫米)
spring constant formula (
Unit: KGF/mm)
:k = (
G*d4）
/（
8*Dm3*Nc）
G: module of rigidity of wire;
D: wire diameter;
Dm: - pitch diameter = diameter
Wire diameter;
Nc: laps = total number of laps - effectively
2.
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