Stretching spring characteristics:
Stretching springs are usually cylindrical springs wrapped in a closed loop, but multiple end styles can be specified. By changing the coil size, wire size, and even spring length, tension springs can be designed to handle different loads, applications, or specific conditions. Like most types of springs, tension springs are made of various materials, depending on application requirements, including factors such as temperature, stress, and corrosive environmental conditions.
Stretching springs are designed to provide resistance.
The coil of the tension spring is tightly wound in the unloaded position.
They have hooks, eyes, or other attachments that can be used to connect to components.
The tension spring provides a rebound force for components that extend in the starting position.
The configuration includes hooks, threaded inserts, extended twist rings, cross center rings, enlarged eyes, reduced eyes, rectangular and teardrop shaped ends, or pull rod springs.
Springs can be made of various materials, and selecting the appropriate material is crucial for achieving optimal performance. The choice of materials largely depends on the intended use of the spring. The key factors to consider when choosing materials for spring manufacturing include:
Spring parameters
Corrosion resistance requirements
operation temperature
Carbon steel is one of the most commonly used materials in spring manufacturing. However, there are also several other materials used, including:
high-carbon steel
High carbon steel contains 0.60% to 1.00% carbon, which gives it higher strength and allows for heat treatment to improve its hardness and toughness. Various alloying elements are added to high carbon steel to improve its tensile strength, making it superior to low carbon steel and making it the most common steel for manufacturing springs.
In order to improve the strength and working temperature range of high carbon steel, alloying elements such as chromium, manganese, molybdenum, nickel, silicon, and vanadium were added. The concentration range of these alloying elements is 0.1% to 50%.
In the smelting process of high carbon steel, the base metal is separated and alloy elements are added in different proportions according to the required steel properties. For example, adding vanadium to increase toughness, while adding silicon and chromium to enable steel to withstand higher temperatures.
Alloy steel used for stretching springs is usually divided into two categories:
Chromium vanadium alloys have high strength and toughness, making them an ideal choice for applications involving high impact forces and impact loads. Compared with high carbon steel or chromium vanadium steel, chromium silicon alloy has excellent tensile strength and can function at high temperatures.
For special applications, chromium silicon vanadium alloy combines the advantages of chromium vanadium and chromium silicon, providing excellent strength and impact toughness in carbon based steels.
When designing a tension spring, several key parameters and specifications must be considered to ensure its elasticity and effectiveness. These basic factors include:
Outer and inner diameters of the spring
Wire diameter
Types of materials used
Initial tension of spring
A load of a certain length that can be grasped
Elongation in pounds per inch
Installation length and maximum extension length for application
Spring ending type
Relative positions of both ends
Hook gap open
Size and dimensions
Stretch springs come in various sizes and specifications to accommodate different loads and space limitations. Understanding the key parameters of a tension spring is crucial for selecting the spring that suits your needs. The main dimensions to consider include:
Hook length: This is the length of the spring from one hook to another when no load is applied. It represents the natural, unstretched state of the spring. The length inside the hook is crucial for determining how much the spring can stretch under load.
Main body length: The length of all coils minus the hooks at both ends. Although tension springs are mainly used for stretching, understanding the length of the main body is important for assembly to ensure that the spring is suitable for the assembled part or product.
Wire diameter: The thickness of the wire used to make the spring will affect its strength and flexibility. The larger the wire diameter, the higher the spring strength and the greater the force it can withstand; The smaller the wire diameter, the weaker the spring strength, but the greater the flexibility.
Outer diameter: This is the total diameter of the spring. The outer diameter will affect the installation method of the spring in a given space and will affect the performance of the spring in narrow or confined environments.
Number of coils: The total number of coils in a tension spring determines its stretching ability and the amount of force it can apply. The more coils there are, the greater flexibility and lower spring constant can usually be achieved, which means that the spring can stretch further but with less force.
Stretch the end of the spring
Tension spring or tension spring is a common tightly wound metal, usually made of steel wire. Hooks and loops are the main end type options for tension springs. The loop is completely closed, and there is a gap between the spring body and the hook end.
Like all springs, tension springs absorb and store energy. When two objects attached to both ends of a spring are pulled or stretched, resistance generates spring tension. The spring force and stored energy will pull two objects back together. Stretch springs are used in agricultural machinery, automotive suspensions, garage doors, trampolines, and many other applications.
A spring is an elastic object that stores mechanical energy. They have multiple designs and daily uses. Whether compressed or stretched from a stationary position, the spring exerts a reaction force roughly proportional to its length change. You should know which type of spring to use depends on the application. Whether the application is compressed, stretched, or twisted depends on the working requirements of the spring, which in turn depends on the end of the spring.
