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Beijing
Long-term effective
2020-05-24 16:33
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Company Profile
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Contact：mxcmy(Mr.)
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Area：Beijing
Address：Beijing
Website：http://www.meixinchang.com/ http://mxcmy.miaoyincn.com/
A spring is a mechanical part that uses elasticity to work. Parts made of elastic materials deform under the action
of external force, and return to their original shape after removing the external force. Generally made of spring steel.
Spring parameters
1. Spring wire diameter d: the diameter of the steel wire used to make the spring.
2. Spring outer diameter D2: the maximum outer diameter of the spring.
3. Spring inner diameter D1: the minimum outer diameter of the spring.
4. Spring diameter D: the average diameter of the spring. Their calculation formula is: D=(D2+D1)÷2=D1+d=D2－d
5. Pitch t: Except for the support ring, the axial distance between the corresponding points of two adjacent
coils of the spring on the pitch diameter becomes the pitch, which is represented by t.
6. Effective number of turns n: the number of turns that the spring can maintain the same pitch.
7. The number of support circles n2: In order to make the spring work evenly, to ensure that the end
of the axis is vertical, the two ends of the spring are often tightened during manufacturing. The number of tight loops only plays a supporting role, and is called a supporting loop. Generally there are 1.5T, 2T, 2.5T, and
2T is commonly used.
8. Total number of turns n1: the sum of the effective number of turns and the support ring. That is,
n1=n+n2.
9. Free height H0: the height of the spring without external force. Calculated by the following formula:
H0=nt+(n2-0.5)d=nt+1.5d (when n2=2)
10. Spring unfolding length L: The length of the steel wire required to wind the spring. L≈n1 (ЛD2)
2+n2 (compression spring) L=ЛD2 n+ hook extension length (tension spring)
11. Spiral direction: There are left and right rotations. Right-handed is commonly used, and right-handed
is generally used if it is not specified in the drawing.
12. Spring winding ratio: the ratio of the middle diameter D to the wire diameter d.
f |
Max |
n=2.5 |
2.1 |
2.8 |
3.6 |
4.3 |
2 |
2.5 |
3.6 |
4.9 |
6.3 |
1.6 |
1.9 |
2.8 |
3.7 |
4.9 |
n=4.5 |
3.8 |
5.2 |
6.4 |
7.8 |
3.6 |
4.4 |
6.4 |
8.8 |
11 |
2.8 |
3.4 |
5.1 |
6.9 |
8.8 |
||
n=6.5 |
5.5 |
73 |
9.6 |
11 |
5.3 |
6.4 |
9.3 |
13 |
17 |
4 |
5.2 |
7.3 |
10 |
13 |
Notes:
1. The above parameter is only for reference, the product is subject to the actual dimension.
2.
Customized product is welcome, please contact us for more details
About Samples
1. If we have the inventory, we will provide samples for free, and you only need to pay for the freight cost.
Samples will be provided within 2 to 5 working days.
2. If the product is a non-standard product and there is no existing mold inventory, The mould cost needed prepaid,
and then free sample less than 200pcs will be provided within 10 to 15 working days. you’ll pay for the freight cost only.
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