Torsion spring should be how to avoid unnecessary problems to explain it with all of you.
Torsion spring is actually belong to one of the spiral spring, the spring is usually dense body, but a nodal distance between spring coil in order to reduce friction.
They spin or rotate to generate resistance force.
According to the application requirements, the design of the
torsion spring handedness (
Clockwise or counterclockwise)
To determine the spring handedness.
So how to avoid the problem of torsion spring improper use?
We know together.
（
1)
More than the use of the maximum torsional stress causing the wreck, close to close with the use of a long, can make the spring line department gradually close to that, because of the high spring constant change caused by load curve with high, nearly and produce high stress to make spring break.
（
2)
No pre-twist use spring distortion caused by jarring spring up and down with clearance, if there are any pre-twist, spring is relatively stable.
（
3)
Spring exhaust using spring exhaust when using, will cause the guide pin and spring wear and fracture.
（
4)
Without the use of the spring guided when used as in the case of dance spring guide, it is easy to cause the bottom of the spring and the ontology of the distortion, the distortion of local high stress is the cause of spring break, please be sure to use inside guide pin or outside guiding device, etc.
（
5)
When assembling surface smooth level degree of bad surface distortion caused the parallelism of the bad spring assembly, high pressure caused by the local fracture, and parallel degree adverse situations cause distortion and more than 300000 spring back to use spring break.
Under the condition of no more than 300000 back to use, please improve the assembly parallelism.
（
6)
About the torsion spring diameter and clearance between guide pin and guide pin before hours, contributes to the impact abrasion of inner diameter, the wear was the cause of spring break will, on the contrary, such as too much between spring distortion caused by fracture, for the spring inside diameter - between the best
1.
0 mm or so.
And free long long spring (
The free length/diameter greater than 4 above)
Please use Duan Jie or pin, in order to avoid the collision of spring body distortion with pin.
（
7)
Outer diameter of the spring and countersunk hole countersunk head and head of spring clearance holes is too hours, due to the spring compression lateral expands with countersunk hole friction force caused by centralized fault, better countersunk head aperture + 1 for the spring diameter.
5mm。
Free long long spring please use countersunk hole shape.
（
8)
Pin length and countersunk hole depth is relatively short pin is too short, will cause the guide pin head and spring wear and fracture, the ideal of the guide pin length is set to spring more than 1/2 of length, and please pour the chamfering of C3.
（
9)
Party or using spring, spring force distortion within the inner ring spring is inserted into the outer ring (
Insert the inner ring or outer race)
Cause fracture.
（
10)
Spring series used in tandem manner when using the spring bending, and transcend pin or countersunk hole length, resulting in a same reason of fracture, and the load caused by the slightly differences between the spring itself loadings weak under more the torsional capacity of surface rupture.
（
11)
Debris, foreign inclusions inclusions when using foreign body part will cause no effect only other part of effective volume of compressed, the essence of effective volume has shrunk near surface caused by the high stress and fracture, do not use foreign inclusions in the spring.
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