coil spring

coil spring
What is a torsion spring?

Surely you have heard the name of torsion spring. These types of springs are designed to store and transfer rotational energy. Unlike compression springs and tension springs that work with compression and tension, torsion springs work with rotational force. In a torsion spring, the spring wire is not folded or bent; As the name of this spring suggests, the spring rotates during operation to transfer energy. In fact, the mechanism of operation of this type of spring is such that the main axis of the device (whether simple or complex) is kept in place by the main body and moves the legs around the main axis.
Method of operation

Torsion springs have a main body in the center and two forks. The two prongs of this spring are connected to mechanisms that rotate around the center of the spring and try to return the device to its original state by applying force.

Types of torsion springs have different applications; Some springs are used as hinges, balancing mechanisms, and return levers. The design of the spring is done in such a way that the applied load is placed in the direction of rotation of the spring. By twisting the spring, the diameter of the main body decreases and its overall length increases. This size change should be considered when designing the spring to fit the space in which it is used.
Change dimensions during use

During operation, the dimensions of torsion springs sometimes undergo significant changes. Usually, the dimensions of the springs that act in the direction of torsion undergo three types of changes:

a) increasing the number of spring rings; In other words, with each 360 degree rotation of each of the prongs, one ring is added to the total number of existing rings.

b) increasing the length of the spring; So that, with every 360 degree rotation of each of the prongs, the length of the spring increases by the diameter of the wire.

c) reducing the average diameter of the main ring of the spring; That is, proportional to the increase in the number of rings, the average diameter of the ring decreases.
Important points in torsion spring design

The points to be considered when designing the spring are:

      1. As we said, during operation, the diameter of the spring that is placed on a rod or in a pipe changes and usually becomes smaller. This size reduction is very important in the performance of the spring and should be considered during the design. If there is not enough slack between the inside diameter of the spring and the rod, it will cause the spring body to lock on the rod and the prongs will deform.
     2. Increasing the length of the spring body should also be considered to create enough slack. Otherwise, the situation similar to the above occurs with a decrease in the diameter of the spring, which results in a decrease in the performance of the spring and its retardation.
     3. In general, the presence of sufficient slack between the inner diameter of the spring and the rod, as well as the length of the body and its place of use, is very important.
     4. Unlike compression springs and tension springs, torsion springs experience more tension when bending. In general, in torsion springs, the initial tension between the rings must be removed in order to create the necessary torsional force.

 
Application of torsion spring:

Torsion springs have many uses in two cases.

     1) Normal suspension in cars
     2) Longitudinal, transverse, panard and anti-roll levers
     3) Types of clips
     4) Equilibrium mechanisms
     5) etc

Types of torsion springs

Torsion springs can be divided into the following categories:

     1. Cape and stepped torsion springs
     2. Twin springs

 

Ebtekar Sanat Fener Company is one of the best producers of all kinds of industrial springs, including torsion springs, by employing a team of engineers specializing in spring manufacturing. Considering the customer's request and complying with the standards, this company has been able to gain the satisfaction of many customers and consumers. Some of the torsion spring production standards in this company are:

     _Maftul with size 0.1 to 32 mm
     _Making all kinds of spring with round, square and oval cross section
     Consumables include carbon-stainless steel, alloy and phosphor bronze
     Production circulation from 1 million and above
     _Production tolerance based on DIN2088 or specifications desired by the customer