Spring testers

How to choose a spring tester: Professional Buying Guide

Choosing the right spring tester is crucial to ensuring reliable, accurate testing in a variety of industrial sectors. The choice of spring tester is based on several criteria, including force measurement range, accuracy, and the type of spring to be tested. An unsuitable tester can lead to erroneous and potentially costly results.

Engineers and technicians should also consider the compatibility of the tester with the working environment. For example, a tester that can be used in the laboratory may not be suitable for a workshop exposed to extreme temperatures or strong vibrations. Thinking about ergonomics and ease of use is important to optimize test time.

Investing in a high-quality tester can improve operational efficiency. It's important to consider the specific requirements of each application to maximize the value of this investment.

Understanding the different types of springs

Springs play a crucial role in a variety of industrial and mechanical applications. They are designed to absorb, store and release energy according to a precise principle. Different types of spring, such as compression, torsion and tension springs, have specific characteristics and uses.

Compression spring

Compression springs are frequently used in many sectors. They are primarily designed to resist an axial force that attempts to compress them. Used in vehicle suspensions, household appliances and electronic devices, these springs are often made from stainless steel or specific alloys for optimum performance.

Compression springs feature non-jointed coils that allow contraction under load. This makes them an ideal choice for applications requiring smooth, gradual energy absorption. Their ability to return to their original shape after compression is a key property, enabling long life and reliable use.

Torsion spring

Torsion springs are essential in mechanisms where rotary force is required. They are commonly used in automatic closing systems, clothespins and trapdoors. These springs work by storing and releasing energy through rotation around an axis, enabling the supported mechanism to operate smoothly.

Made from stainless steel or carbon steel, torsion springs can be designed to operate in either clockwise or anti-clockwise directions. Their sizing is crucial for optimum performance, requiring particular attention in the choice of initial winding angle and wire diameter.

Tension spring

Extension springs, also known as tension springs, are designed to stretch and return to their original length. Typically used in spring scales, clamps and door closers, this type of spring works by absorbing energy when stretched.

Hooks or loops at each end of the extension spring allow easy attachment. These springs need to be precisely calculated to deliver the required performance, bearing in mind factors such as initial length, maximum tensile force and type of material. Galvanized steel is often used for its corrosion resistance and longevity.

Spring specifications and measurements

When selecting a spring tester, essential considerations include dimensions, materials, as well as elasticity and mechanical stress analysis. These elements play a crucial role in assessing spring performance and durability.

Dimensions and materials

The choice of spring dimensions, such as length, diameter and number of coils, has a direct impact on its function. Free length is an essential measurement, corresponding to the length of the uncompressed spring.

Stainless steel springs offer excellent corrosion resistance, making them ideal for damp or corrosive environments. Galvanized steel is also prized for its durability. The choice of material will depend on specific conditions of use and environmental requirements.

Elasticity analysis and mechanical stresses

Analyzing the elasticity of a spring is crucial to understanding its performance. This property determines the spring's ability to return to its initial shape after deformation. Tensile or compressive strength and mechanical stress also influence durability.

Springs must withstand loads without failure. Testers evaluate these aspects by measuring :

• free length: height or length of the spring without stress
• force at several heights of compression, coiling or stretching: generally tested at 1 or 2 points on the spring, depending on the application.
• Stiffness: Expressed in N/mm or Nm/°, it indicates the strength of the spring. It corresponds to the slope of the spring curve for simple springs.
• jointed-coil force: The force when all coils are touching each other in compression.
• hysteresis: difference in spring stiffness between increasing and decreasing forces.

Measuring instruments must be specified to ensure accurate testing, thus guaranteeing that springs can function reliably in their respective applications.

Select the right spring tester

When choosing the right spring tester, there are a number of key criteria to consider. In addition, accuracy plays a crucial role in ensuring reliable, reproducible test results.

Criteria for choosing the right tester

The choice of spring tester depends on several factors. Force measurement range is crucial: it's important to choose a device capable of measuring the maximum expected force. The measuring range must correspond to the specific requirements of the springs in question. Ideally, the instrument should measure between 20% and 80% of its capacity for optimum results.

The expected cycles of use are also important. A device capable of withstanding several cycles without compromising its functionality ensures durability. Checking compatibility with different types of springs, such as coil or leaf springs, is essential for proper measurements.

A simple user interface and suitable software make it easy to analyze results.

The importance of precision in spring testing

Precision is crucial to ensure accurate and reliable results when testing springs. An inaccurate tester can lead to errors in assessing the applied force and affect the final choice of spring. During testing, small inaccuracies can accumulate, compromising the overall analysis.

Measuring instruments must have high-precision sensors (ideally 0.1% of the measuring range) capable of detecting even the smallest variations in force (high resolution, minimum 1/5,000 of the measuring range). Regular calibration is essential to maintain this accuracy over time. The use of robust materials reduces wear-related fluctuations, ensuring reliable results over the long term.

Measuring spring height is crucial for accurate results. For high-capacity springs, you need to take into account the deformation of the machine, which will influence the results. For very small-capacity springs, care must be taken to ensure that instrument clearances are minimal.

By integrating these elements, users can obtain an accurate assessment of their springs' characteristics, guaranteeing their optimum performance in a variety of applications.

Specific spring applications

Springs play a crucial role in a variety of industries, providing essential mechanical solutions. In the automotive industry, springs provide suspension and comfort, while in aeronautics, they contribute to aircraft safety and efficiency. In the medical field, springs are used to ensure the precision of instruments.

Automotive industry

In the automotive industry, springs are essential for suspension and damping systems. They absorb and dissipate shocks, ensuring a comfortable and safe ride. Coil springs and shock absorbers are essential for maintaining vehicle stability on the road.

Springs are also used in seatbelt locking spring systems, providing a rapid locking function in the event of a collision. Their resilience and robustness are put to good use in automotive design to extend vehicle life and ensure optimum performance.

Aeronautical sector

In the aeronautical sector, safety and efficiency often depend on springs. They are incorporated into landing gear systems and flap opening and closing mechanisms. Compression springs and leaf springs are common, as they provide the force needed to support heavy loads.

Aircraft also use springs in cockpit equipment and to dampen vibrations, crucial to maintaining safe, stable flight. Their ability to withstand high load cycles and extreme conditions makes them an ideal choice for this industry.

Medical field

In the medical field, springs are used for their precision and reliability. They are integrated into devices such as spring-loaded syringes and surgical forceps, where a fast, precise response is required. Compression springs provide the controlled force required for these applications.

In addition, extension springs are used in a variety of medical devices, contributing to the smooth, safe operation of instruments. Their use ensures that healthcare professionals can rely on tools that meet the highest performance standards. The springs create a perfect balance between flexibility and durability, meeting the critical requirements of the medical sector.