What are Compression Springs? Everything You Need to Know for Industrial Applications

Some applications need continuous pressure in the form of frequent suppression. This makes the use of springs in those applications. Compression springs are the most common since many types are available in the industry. This means you will discover why they are so prominent in many industries.

What is a Compression Spring?

It is a cylindrical helical coil that can store energy and release it when pressed vertically. This compression spring has a coil-shaped body, which helps it get suppressed and retracted. Its coiled body has multiple rings that help it to allow energy in a balanced way. Many applications need continuous compression without any change in response. A compression spring is the best in such applications. 

How Compression Springs Work: Key Principles

When you apply a load to a compression spring, it gets compressed. As a result, it stores energy and releases it only when the load is removed. The number of springs and their size matter a lot. Also, the distance between each coil affects the performance of a compression spring. 

Spring rate is a rule of thumb for selecting a compression spring for your needs. It decides how much stiffness one needs in their spring. If the spring rate is high, the stiffness will also be high. The higher the spring rate, the higher the stiffness will be. Some applications need a low spring rate, and some require a high one. That depends on the pressure level a spring can deal with. 

Likewise, factors that affect the spring rate of a compression spring are the number of coils, the diameter, the thickness of the coil, and the type of metal. 

They absorb potential force and release it in kinetic form. They retract for shock absorbance, which helps many machines. They hold tension when in suppressed form. As soon as the tension is released, they recoil in precious form by releasing all the energy equally.

Types of Compression Springs

There are different types of applications in the industry. These types have eccentric functions that make them suitable for specific applications. 

Straight Coil Compression Springs 

It is a standard type of spring with a straight coil in a helix shape. Its straight body shape is compatible with many machines and general goods. 

Conical Compression Springs 

This type has a conical shape, which means one end is small and the other is large. The diameter increases gradually from the start to the end, just like a cone. It is a useful type for applications where small terminals can work better.

Barrel Compression Springs

This one has a barrel shape. It has a small diameter at the beginning and end but a large diameter in the center, just like a barrel. Its narrow ends shift the tension to the more significant center for high absorption. This shape makes them useful for applications where both terminals or sides are compact.

Hourglass Compression Springs

They have an hourglass shape with a broader diameter at the start and end. However, the central diameter is narrow. Large surfaces with balanced absorption in the center are required. The starting and ending coils have to bear a more significant weight.

Variable Pitch Compression Springs

This is similar to a straight compression spring but with a slight difference. That difference is the variable pitches. The starting and ending pitches are tight, while the central pitches are wider, allowing variable effects in the spring.

Common Materials Used in Compression Springs

You will find them available in different materials for different conditions. Since only one material can not withstand every condition, industries must choose the right type for better compatibility. 

Stainless Steel

Stainless steel is the strongest option that is most durable metals best suited for compression springs. Most industries use stainless steel because of its corrosion resistance, durability, toughness, and flexibility.

Music Wire

It is carbon steel wire, which is also tough and durable enough. However, its corrosion resistance is lower than SS's, making it less durable. Carbon steel also has good tensile strength.

Phosphor Bronze and Brass

Many electrical appliances prefer using bronze, brass, and copper springs to achieve electrical conductivity. They also seek heat conductivity along with high compression. This is why this material is suitable, where compression and conductivity are equally important

Alloy Steels

Some metals have high durability and strength, which makes them suitable for harsh conditions. Industries that need compression springs to deal with high stress and temperature go for alloy steels. This metal type is ideal for extreme conditions. 

Factors to Consider

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It is not about randomly selecting metal for compression springs. One has to choose each type according to the working conditions, such as pressure, heat, chemical, and water resistance. Not only stainless steel,its other types like carbon steel, alloy steel,and copper, brass,  can withstand their specific conditions.. Their durability levels differ when they face different environmental conditions. 

Industrial Applications of Compression Springs

Different industries rely on compression springs, such as automotive, aerospace, electric, electronic, and household goods industries. Due to this reason, compression springs are installed at a high rate in different products. They work in suspension systems, clutch systems, engine valve systems, brakes, accelerators, etc. Likewise, the aerospace industry uses them in landing gear and similar systems. 

The most common use is in electrical equipment like battery contacts. Many switches and connectors have compression springs to apply pressure for continuous connectivity with terminals. Likewise, consumer products like door locks, ballpoint pens, toys, firearms, and pumps have the same springs.  

Benefits of Using Compression Springs in Industrial Applications

  • As we discussed earlier in the blog, they offer high energy absorption. Their primary function is to efficiently absorb and release energy under pressure. 
  • Their high durability makes them a suitable choice for repeated applications. They neither lose their elasticity nor retractability. 
  • They are highly versatile because they are available in different sizes and materials for multiple applications. 
  • High-stress conditions can neither break nor deform them.

How to Select the Right Compression Spring for Your Application

A few criteria simplify the selection process. Once you follow them, the compression spring selection process will be less challenging. 

  • The first thing is the load requirement, which you must decide. The size of the machine, the force level, and the working conditions will affect that. Analyze the maximum load and deflection level to choose the correct diameter and thickness of the spring. Also, the correct type of spring will decide the performance level.
  • Then, you will have to consider environmental factors like water and chemical corrosion resistance. The temperature range will also affect the decision. Some conditions require only the toughest materials.
  • The tolerance level of spring will decide how long it will survive. You must decide on metal type, coil thickness, design, and pressure consistency.

Lastly, you will need to consider all the factors in supplier selection. Look for customization, bulk production, wholesale rates, and timely delivery. Also, look for verification from other buyers of that supplier, along with certification and global compliance.

Conclusion

Installation of compression springs makes the application easier in compression activities. It is hard to imagine any other spring to perform reasonably except this one. Choosing the right size and type of compression spring will suit the compatibility.

FAQs

What is the difference between a compression spring and a torsion spring?

They are different in shape and function. One deals in compression, and the other deals in torsional force. Also, one works vertically, and the other works horizontally.

What is another term for compression springs?

Some call them push springs, and some call them helical coil springs. However, the most common name is compression spring.

How does a compression spring differ from a tension spring?

Both have similar designs with just a little difference. The compression type deals with compressive force, where the spring is pushed. The other deals in tension, where the spring is pulled instead of pushed. This is why it has hooks on both ends.

Do compression springs break? 

Yes, they break if they can't bear the excessive load and environmental conditions. Overloading, corrosion, improper installation, and also fatigue can break them.

Which is the best spring for compression?

The best compression spring for this purpose is a coil spring. However, there are different subtypes in the industry, which further clarify the selection process. It is about their shape and coil distance.

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