Double torsion springs are very common in our daily lives. Mainly used in electronics, resistant to air, steam, water, acid, alkali, salt and other corrosive media. According to the mechanical properties of double torsion spring materials, most of them are stainless steel double torsion spring materials, which can be divided into various types of double torsion spring materials according to their shapes.
References when choosing a double torsion spring
2. Control diameter: outer diameter, inner diameter, inner diameter of casing, or outer diameter of the round rod passing through.
3. Wire size "wire diameter".
4. Material (type and grade).
5. Number of turns: total number of turns and right or left turn.
6. Torque: the number of pounds deflected to a certain angle.
7. Maximum deflection (angle from free position).
8. The form of the end.
Double torsion spring performance description
Since torsion springs are subject to torque and rotation, the stiffness of the spring should be strictly adjusted. Spring stiffness refers to the rotational torque developed at a fixed unit and angular position. If the spring stiffness is not enough, the torque and rotational force will not be enough. In addition, three points must be paid attention to when using torsion springs: large shape variables, large loads, and standardized rotation directions.
Among them, the maximum deformation refers to the maximum deformation that the spring can withstand. In other words, the higher the maximum degree of deformation, the better. At the same time, the maximum load refers to the duration during which the spring does not deform while maintaining rotational force. Of course, the longer it lasts, the better. Finally, there is also a description of the direction of rotation, which refers to left and right rotation, the rotation angle and size of the torsion spring, etc. The larger the rotation angle, the better.
What is the cause of double torsion spring fatigue?
The main research results are as follows: Yield strength There is a certain relationship between the yield strength of materials and fatigue. Generally speaking, the higher the yield strength of the material, the higher the fatigue strength. Therefore, in order to improve the fatigue strength of the double torsion spring, the tensile strength of the double torsion spring material should be increased as much as possible.
Increase fatigue resistance
Considering the service life, high corrosion-resistant materials such as stainless steel and non-ferrous metals can be used. Add a protective layer to the surface, such as coating, oxidation, plastic spraying, spray painting, etc. Practice has proven that cadmium plating can greatly improve the fatigue performance of double torsion springs.