Constant force spring: what is so special about it?

A constant force spring is a special type of spring that plays an important role in many machines and devices. What is so special about constant force springs? Here is a detailed analysis of its features.

1. Structure and Design

Constant force springs are usually wound from flat metal wire to form coils with almost constant pre-stress. This design enables constant force springs to provide a relatively constant force when stretched or compressed. Whether it is tension or torsion, the internal stress of the constant force spring can effectively resist the load and ensure the stable operation of mechanical parts.

2. Material Selection

The material selection of constant force spring is very important. It is usually made of elastic materials such as stainless steel or high-strength alloy steel to ensure that the spring is not easily deformed or damaged under load. These materials not only have excellent strength and toughness, but also have good corrosion resistance and wear resistance, which prolongs the service life of constant force springs.

3. Principle of operation

The working principle of constant force springs is based on the characteristic of deviating from Hooke’s law, i.e. the relationship between tensile or compressive deformation and stress is no longer linear. Within a certain range, no matter how much the spring is stretched or compressed, its output force remains constant. This feature makes constant force springs perform well in situations where stable force output is required.

4. Performance Characteristics

Constant elastic force: Constant force springs can maintain a relatively constant elastic deformation, thereby accurately controlling the deformation and motion state of the product.

Stable quality: Constant force springs have a long service life and can meet the requirements of use in various complex environments.

Diverse materials: There is a wide range of materials for constant force springs, and different materials can meet different application requirements.

Customizability: The size, shape and strength of constant force springs can be customized to meet the special requirements of customers.

5. Maintenance and Care

Although constant force springs have high performance and reliability, regular maintenance and care are essential. During use, the deformation and wear of the springs should be checked regularly and damaged springs should be replaced in time. At the same time, it is also necessary to avoid excessive shock or friction on the springs so as not to damage their structure.

In conclusion, constant force springs play an irreplaceable role in many machines and equipment due to their unique structure, material selection, working principle and excellent performance characteristics. With proper selection and maintenance, constant force springs can provide stable force output for mechanical parts and ensure the normal operation of equipment.