Springs are a common item in our lives, often found in many places, such as in scissors, automotive parts, and more. Springs come in a wide variety of types. Today, we will introduce how to design a good compression spring from the perspective of a spring manufacturer.

Compression springs involve many parameters, so let’s first understand their significance.

• Material – The material of the spring
• Wire diameter – The diameter of the spring wire
• Outer diameter – The outer diameter of the spring
• Number of coils – The total number of coils and how many support coils are at both ends
• Free length – The length of the spring in its free state
• Force – When a spring has force requirements, it is necessary to know the working height of the spring – how much the spring needs to be compressed (or pushed down) for it to achieve a specific force.

After understanding some relevant parameters of springs, we also need to analyze the relationship of force in compression springs, which is an essential aspect of designing a good spring.

1. For springs with the same specifications and size parameters, if we only change the wire diameter, a larger wire diameter results in greater spring force, and vice versa.
2. For springs with the same specifications and size parameters, if we only change the outer diameter, a larger outer diameter results in smaller spring force, and vice versa.
3. For springs with the same specifications and size parameters, if we only change the number of coils, fewer coils result in greater spring force, and vice versa.
4. For springs with the same specifications and size parameters, if we only change the free length, a longer length results in greater spring force, and vice versa.