In a tensile
spring heat treatment and quenching process, the cooling speed should be controlled tensile spring products, in order to obtain high and even hardness and enough hardening layer depth, at the same time reduce the deformation and prevent cracking.
What is the action of tensile spring quenching:
1, steel hardenability: hardenability is also called the hardenability, is refers to under prescribed conditions, the hardening depth and hardness of the steel sample distribution characterized by material performance.
These are the characteristics of steel itself;
2, to stretch the spring products, steel grade requirements for the carbon content is 0.
50% -
0.
75%, manganese element is zero.
50%.
Carbon and manganese are affect the hardenability of elements.
Due to the domestic steel hardenability band wider, quenching oil cooling rate should be according to the condition of low hardenability choice;
3, fast quenching oil is mainly used for thickness or diameter smaller alloy constructional steel and carbon steel spring.
Spring enterprise all hope each heat treatment furnace can deal with more specifications of the spring.
tensile spring design parameters:
indicate the material diameter (
d)
, outer diameter (
D)
The presidents (
Ho)
The work world (
n)
, the location and shape of earring, load (
我p p 1 p 2……)
And the corresponding value (
H1H2……Hj）
If there is early tension, as shown in figure, is on the Po.
Application:
tension springs and spiral extension spring, generally for pitch, such as cross section is round more, they can be used in many occasions, such as production assembly, experiment, research and development, maintenance, etc.
Tension spring occupies an important position in the global market, widely used in national defense, Marine, computer, electronic, automotive, mold, medical, biological, chemical, aerospace, railway, nuclear power, wind power, thermal power, engineering machinery, mining machinery, construction machinery, elevator, etc.
:
a number of different terminal device or a 'hook' is used to ensure tensile spring source of tension.
Contrary to the principle of
compression spring tension spring.
Compression spring reverse effect at the time of compression and tension spring, a reverse effect at the time of stretching or open.
When tensile spring open on both ends, spring will be trying to bring them back to together.
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