Brief introduction of several common springs

Extension spring
The following is the necessary information for a tension spring:
(1) Free length: (a) total length, (b) length of all loops, (c) length within the hook.
(2) Control diameter: (a) outer diameter, (b) inner diameter, (c) inner diameter of casing.
(3) Wire size “wire diameter”.
(4) Material (type, grade).
(5) Number of turns: (a) total number of turns and (b) right-handed or left-handed.
(6) The form of the end.
(7) Load in the hook.
(8) Load rate, deflection, pounds per inch.
(9) Maximum tensile length.

The extension spring is a typical spring, which is the representative of spring. It can be shaped according to the design from the straight tube shape to various variants, and even the various shapes of the hook.
Extension spring is the reverse application of compression spring. Its application range is generally less than that of no specific product category, but its operation control is one level higher than that of compression spring.

Compression spring
Because it can bear pressure, both ends can be open or closed, or wound flat or ground flat. The following information is necessary for compression:
(1) Control diameter (a) outer diameter, (b) inner diameter, (c) inner diameter of casing, and (d) outer diameter of round rod.
(2) Wire or bar size.
(3) Material (type and grade).
(4) Number of turns: (a) total number of turns and (b) right-handed or left-handed.
(5) Style of ends.
(6) The load at a certain deflection length.
(7) Load ratio in the range of one inch to several inches in length.
(8) Maximum solid height.
(9) The minimum compression height is used.

Compression spring is the first type of variant spring, which can be shaped according to the design, ranging from straight cylinder type, conical type to contraction type, convex waist shape and even various tail end variants.
Compression spring is one of the most widely used springs among all kinds of springs. Its products are widely used in electronics, motors, computers, information, motorcycles, bicycles, hardware tools, gifts, toys and even the national defense industry. Because of its easy to master design and principle, the manufacturing control is also the most simple.

Torsion spring
The coils are either tightly or separately circumscribed to suit the torsion load (at right angles to the spring axis). The end of the spring can be wound into a hook or a straight torsion arm. The following information is required for a torsion spring:
(1) Free length.
(2) Control diameter: (a) outer diameter, (b) inner diameter, (c) inner diameter of casing, or (d) outer diameter of round rod.
(3) Wire size “wire diameter”.
(4) Material (type and grade).
(5) Number of turns: (a) total number of turns and (b) right-handed or left-handed.
(6) Torsion force: the number of pounds deflected to an angle.
(7) Maximum deflection (angle from free position).
(8) The form of the end.

Torsion spring is the extreme of the variant spring. The deformation from single torsion to double torsion and even all kinds of torsion bar can be shaped according to the design.
Torsion spring is one of the most complicated spring design principles among all kinds of springs. The change of its type is also quite lively, so the theory involved in the design is also the most troublesome. Therefore, it is difficult to master the design.

Very fine spring
Suitable for precision electronic components.
The wire diameter of this kind of spring is between 0.15mm and 0.06mm, and the wire diameter and the size of each part are about 1mm. Therefore, it is quite difficult and technical to debug the machines and tools. The general application range is precision electronic components, precision instruments, clocks, etc.

Coil spring
It can be used in tape measure, automobile starting motor, storage wire box, etc.
Coil spring, also known as spring, is similar to torsion spring, but because of its high torque and multi angle torque distance, it is not easy to fatigue when it is applied to the mechanism that works for a long time. Its application category can be roughly classified into tape measure, automobile starting motor, storage wire box, etc.

Clasps
According to the design of customers, it can be used in the fixed or auxiliary parts of different mechanisms.
The material application is roughly the same as the spring type. This kind of product is generally designed by customers according to their needs, and is generally used as auxiliary parts or mechanism parts.

Shrapnel
According to the characteristics of materials, it can be used in different environments.
We have a technical forming machine with different principle from that of lathe, which can overcome the parts difficult to be formed by punch press. And relatively low mold cost advantage, so widely accepted by customers.