Exploring Different Types of Springs and Their Manufacturing Process--cncmass.com(rapid direct Linda)

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Springs are versatile mechanical components that store potential energy when compressed or stretched and release it to perform various functions. From small household items to complex industrial machinery, numerous applications in different fields rely on the functionality of springs. In this article, we will delve into the world of springs, exploring their various types and understanding the manufacturing process behind them.

1. Compression Springs:
Compression springs are widely used in everyday objects like pens, mattresses, and automotive suspensions. They work by resisting compressive forces and absorbing shock or providing support. To produce compression springs, manufacturers utilize CNC machining techniques. A high-quality steel wire is passed through a CNC coiling machine, where it is precisely wound around a cylindrical mandrel. The machine then forms the desired pitch and pitch diameter, followed by heat treatment for enhanced durability and elasticity. Finally, the spring is cut to its required length and surface-finished if necessary.

2. Tension Springs:
Tension springs, also known as extension springs, operate in an extended position and absorb energy by stretching. Common applications include garage doors, trampolines, and balance scales. Similar to compression springs, tension springs are manufactured using CNC machines. Steel wire is fed into the machine, where it undergoes precise winding around a mandrel while being stretched. After reaching the desired length and specifications, the spring is set aside for stress-relieving operations such as shot peening or stress relieving annealing. This ensures optimal performance under varying loads.

3. Torsion Springs:
Torsion springs function by exerting torque rather than linear force, finding applications in clothespins, clipboards, and door hinges. Manufacturing torsion springs involves advanced CNC machinery equipped with rotating spindles. A straight steel wire is mounted onto a spindle, which rotates while applying tension to form coils. The number of rotations and overall shape depend on the application's specific requirements. Post-winding, heat treatment ensures the spring achieves optimum strength and flexibility.

4. Constant Force Springs:
Constant force springs are unique in that they provide a constant load or force throughout their entire length. Often used for retractable cords, tape measures, and window balances, these springs require specialized CNC equipment for production. High-quality flat steel strip is precisely coiled using CNC machines to ensure consistent spacing between each coil. Further processes, such as heat treatment and deburring, enhance both performance and aesthetics of the final product.

5. Belleville Springs:
Belleville springs, also known as disc springs, are conical-shaped units used to handle high loads within limited spaces. These springs can be stacked serially to achieve varying stiffness levels. CNC machining plays a fundamental role in fabricating belleville springs. Flat metal blanks are preloaded onto hydraulic presses equipped with programmable dies. The machine accurately forms and curves the discs into desired shapes, creating precision-engineered springs.


Springs play an integral part in numerous mechanical systems, enabling them to function effectively by absorbing, storing, and releasing energy. Whether it be compression, tension, torsion, constant force, or belleville springs, each type has its unique characteristics and applications. By employing advanced CNC manufacturing techniques, springs of various sizes and complexities can be produced with utmost precision, ensuring optimal performance in diverse industries. CNC Milling CNC Machining