CNC Machining: Exploring Different Kinds of Springs(centrifugal casting Afra)

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Springs are an essential component in various industries and applications. These mechanical devices store potential energy and release it in the form of kinetic energy when subjected to external forces. They play a crucial role in absorbing shocks, maintaining tension, providing support, and controlling motion within systems. In this article, we will delve into the fascinating world of springs, discussing their different types and how CNC machining is utilized in producing these precision-engineered components.

Types of Springs:

1. Compression Springs:
Compression springs are one of the most common types of springs, known for their ability to store energy by compressing them axially. These springs work on the principle of opposing force, resisting compression when compressed. They are widely used in automotive suspensions, machinery, valves, and countless other applications where shock absorption or pressure resistance is required.

To produce compression springs using CNC machining techniques, manufacturers start with high-quality spring steel wires. These wires are fed into CNC coiling machines that precisely wind the wire around a rod or mandrel. The machine applies controlled tension to ensure consistent pitch and diameter as per the required specifications. After coiling, the ends of the compression springs are formed using CNC-controlled presses, resulting in a finished product ready for use.

2. Torsion Springs:
Torsion springs operate based on torsional stress, providing rotational energy when twisted about their axis. These springs find widespread usage in applications such as garage doors, clothespins, hinges, and electrical switches. They resist both outward and inward rotation, allowing precise control over movement and positioning.

In the CNC machining process for torsion springs, raw steel wires are likewise coiled using specialized equipment. However, in this case, the wires are wound tightly with a predetermined angle between them to create torque. CNC milling machines may be employed to add additional features and enhance the surface finish of the springs if required.

3. Extension Springs:
Extension springs work on the principle of tensile stress and are designed to resist stretching upon application of an external force. These springs provide resistance while extending, making them suitable for applications such as trampolines, garage door systems, balance scales, and more.

To manufacture extension springs using CNC machining techniques, a wire of specific material is coiled tightly around a mandrel in a similar manner to compression springs. The ends of the springs are usually extended and bent at certain angles, allowing easy attachment to other components or support structures. CNC bending machines play a vital role in achieving consistent and precise shapes during this process.

4. Constant Force Springs:
Constant force springs are known for their uniform, unchanging force throughout their deflection range. They are used in various devices where constant torque or tension is necessary, like retractable cords, tape measures, window shades, and hospital equipment.

The production of constant force springs involves repetitive stamping processes. A large strip of flat spring steel undergoes successive stamping operations carried out by CNC-controlled presses. The repeated pattern of curves or waves allows these springs to exhibit a linear characteristic over their full extension range.

CNC Machining in Spring Production:

CNC machining technology has revolutionized the manufacturing process of springs, providing increased precision, enhanced productivity, and better quality control. Computer Numerical Control (CNC) machines allow manufacturers to automate many steps involved in producing springs, reducing human error and ensuring consistent results batch after batch.

By utilizing CNC coiling machines, manufacturers can achieve tight tolerances, accurate pitch and diameter ratios, and consistent coil formations. CNC presses enable controlled forming of the spring ends, ensuring uniformity across all produced units. Additionally, CNC milling machines offer the flexibility to add special features or surface treatments based on specific requirements.


Springs come in a diverse range of types, each tailored to meet unique industrial needs. Whether it's compression springs, torsion springs, extension springs, or constant force springs, CNC machining has revolutionized their production process. By leveraging the precision and capabilities of CNC technology, manufacturers can consistently produce high-quality springs that offer reliability, durability, and superior performance in countless applications across various industries. CNC Milling