Exploring the Different Kinds of Springs and Their Applications(automotive fastners Dana)

  • Time:
  • Click:32


Springs are an integral part of various machines, devices, and systems in our everyday lives. They play a significant role in ensuring smooth functionality, absorbing shocks, applying force, storing energy, and much more. In this article, we will delve into the world of springs and explore the diverse types available, along with their applications.

Types of Springs:

1. Compression Springs:
Compression springs are widely used for resisting compression forces or restoring different components to their original positions after being compressed. These springs work on the principle that they increase in length when subjected to load and exert an opposing force. Examples of compression spring applications include automotive suspensions, mattresses, industrial machinery, and medical devices.

2. Extension Springs:
Extension springs operate conversely to compression springs. They expand and exert resistance against pulling forces, returning to their original shape when no longer stretched. Extension springs find applications in garage doors, trampolines, farm equipment, toys, and various industrial uses. The design of extension springs can be modified to suit specific requirements such as increased tension or reduced space.

3. Torsion Springs:
Torsion springs function by exerting rotational pressure using a twisting motion. When torque is applied, these springs store potential energy that can later be released in controlled movements. Common examples of torsion spring usage include clothespins, balance scales, door hinges, and vehicle suspension systems.

4. Constant Force Springs:
Constant force springs generate a nearly constant force throughout their entire deflection range. These springs consist of tightly wound strips that unwind smoothly without any abrupt changes in tension. Due to their consistent force output, they excel in applications such as tape measures, counterbalance mechanisms, retractable cords, and window shades.

5. Belleville Washers:
Belleville washers, also known as disc springs or conical disc springs, resemble flat washers that can be stacked together. As their shape suggests, they exhibit a conical or cupped form and provide high load capacity in small spaces. Belleville washers find application in valves, clutches, bolted connections, electrical switches, and disk brakes.

Production of Springs:

Springs are manufactured using various production methods, the most common being CNC (Computer Numerical Control) machining. CNC machining produces precise springs by removing material from bar stock to achieve the desired dimensions and specifications. The process involves programming the machine with precise instructions for tooling paths, cutting speeds, depths, etc., resulting in accurate and consistent spring manufacturing.

To produce a spring using CNC machining, the following steps are generally followed:

1. Material selection: Choose an appropriate material for the specific application based on factors like elasticity, tensile strength, corrosion resistance, and temperature stability.

2. Design and customization: Create a 3D model or draw a technical blueprint of the required spring design, considering the intended use and any specific modifications needed such as varying wire diameter, coil pitch, or end configurations.

3. CNC programming: Utilize computer-aided design (CAD) software to generate coded instructions (G-codes) for the CNC machine, specifying the necessary tool movements, feed rates, depths, etc., to ensure precise replication of the spring design.

4. Machining: Load the chosen material onto the CNC machine and calibrate it accordingly. Start the machining process, during which the machine's cutting tools remove excess material while conforming to the programmed design. Multiple passes may be required to achieve the desired spring shape and dimensions accurately.

5. Inspection and finishing: Once the machining is complete, conduct thorough quality checks to verify dimensional accuracy, surface finish, and overall functional properties. If required, apply additional post-processing techniques like heat treatment or coating for enhanced durability and performance.


Springs serve numerous essential functions in diverse industries, ranging from automobiles and construction to electronics and healthcare. Understanding the different types of springs and their applications enables engineers, designers, and manufacturers to select the most suitable option for maximizing performance and reliability in various systems. With CNC machining technology playing a pivotal role in spring production, precision and customization have become more accessible than ever, ensuring consistent quality throughout the manufacturing process. CNC Milling