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Stability of the properties of the springs is due to a
decrease in the loss of elastic properties over time. Stabilization
of qualities is carried out by mechanical aging and defamation.
Aging occurs during periodic loading and unloading of the
spring for several hours at a frequency of 30 ... 50 Hz. The
disappointment consists of loading the spring with a load that
exceeds the estimated value, within 6 ... 48 hours.
The main requirement put to the springs is to ensure the
accuracy of the elastic characteristic, that is, the relationship
between axial force and deformation.
The defects of the springs arising during the operation
are cracks, breakages, wear of the surface of the supporting
turns, deformation and violation of the concentricity of the
turns, loss of stiffness. To detect these defects, examine the
springs with a four-magnifying magnifier and check the
elasticity of special devices. The spring is considered suitable
for further operation, if it is necessary to apply an effort
exceeding the minimum allowable to a certain size for its
compression (for the contraction springs of brake pads -
stretching). Оглядають пружини, які підлягають
дефектації, за необхідності використовують лупу. Під час
огляду особливу увагу звертають на наявність тріщин,
обломів і різницю еталонної пружини і пружини, яка
підлягає дефектації. Одержані результати записують у звіт.
Adjust the device (fig. 10.3) to control the springs
(valves, clutch or brake chamber) of the specified name and
size. To do this, scrolling the screw 2 counterclockwise reduces
the movement of the slider, clockwise - increase the speed of
the slider. Install spring 3 on stand 4 of table 5 and push handle
6 on lever 6 down, fixing the height of the spring without load,
using the scale of nonius 7 and line 8, and then compress the
spring to the minimum working size according to the
specifications for this spring. The linear dimensions (height at

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