Hogar > Blog > Problema comun > How to determine the length of a constant force spring

How to determine the length of a constant force spring

source:Qianye Precision time:2022-9-14

  Constant force springs are mechanical devices used in applications that typically require some kind of balance or retraction mechanism. In design and function, constant force springs differ from the more common types of coil springs. They apply a consistent linear force or torque that remains constant over a wide range of motion.

When a coil spring is under force, whether it is stretched, compressed, or rotated, it produces a force proportional to its stretch. How a spring responds when a force is applied or released is called spring deflection. Years of experience tell us what happens when a spring is released from its temporary state. We know that the spring will return to its original position, but it will be proportional to the force exerted on it before releasing. A spring has a restoring force that allows the elastic material to return to its original state – the equilibrium position after the applied force is removed.

Stretching, squeezing or twisting, what makes a coil spring a spring is its proportional restoring force. It’s named after the 17th-century British physicist Robert Hooke who made the discovery, according to Hooke’s Law. Essentially, this law describes a linear relationship where the amount of stress applied to a spring is proportional to the force applied to it.

    Determine the length of the constant force spring
Constant force springs differ from traditional helical wound springs. First, they are made from high-volume, thin pre-stretched stainless steel strips that are coiled into flat spirals. In contrast, coil springs are not flat, thin steel strips, but are made of spring wire. The flat helical design of the constant force spring allows for a large angular deflection of multiple rotations, allowing only a small portion of the entire stretch to be used.
    Although classified as extension springs, the most common type of constant force spring is the helically wound torsion spring, which can be designed to produce a consistent force in linear motion or manufactured to apply a constant torque. A constant force spring does not have the same proportional restoring force as a spring governed by Hooke’s law. Instead of a proportional force, a spring exerts a consistent linear force over its range of motion.

    As the flattened strip unfolds, its energy is stored within the strip. When a force is required for linear motion, the strip extends along a linear path. If torque is needed to provide rotational motion, the strip can either coil itself or move in the opposite direction onto another spool. How designers and engineers need to determine the overall length of a constant force spring when working on a design project. The general rule states that once the full load rating of the spring extends to a length equal to 1.25 times its diameter, a near-constant force is developed. From then on, it maintains a relatively constant force regardless of the extension length. The load is determined by the width and thickness of the material and the diameter of the coil.

     Advantages of constant force springs
Springs are extremely durable, with fatigue life cycles ranging from 2,500 cycles to 1,000,000 cycles, depending on the size of the spring and the loads it is designed to support. They are found in mechanical devices with long motion capabilities. This will include counterweights, door closers and feed mechanisms for floor dispensers and automated machinery; also retractable hoses, cords, tool head returns, seat belts and exercise equipment; as well as hair dryers, toys, motors, appliances Wait. Constant force springs are versatile springs with a variety of applications where a constant load is required to balance, provide tension, retract or dispense objects.
    Shenzhen Qianye Precision Metal Co., Ltd. is a professional manufacturer of high-precision clockwork springs. The company integrates product development, production, sales and service, and has all kinds of skilled and experienced engineering and management personnel. Sincerely welcome new and old customers and friends from all walks of life to visit the company and negotiate business cooperation 13827443413 Liu Gong! Qianye Precision will serve you wholeheartedly!

Últimas noticias

 What’s the role of the power spring play in the vacuum cleaner?
What’s the role of the power spring play in the vacuum cleaner?

Time:2023-5-24

The vacuum cleaner has two cores, the main body and the hose reel, both of which are indispensable. The power spring is an accessory applied to the hose reel, and its main function is to assist the contraction of the hose reel. How does it do this? It is not difficult to see the clues from the characteristics of the...

 Understanding the Mechanics and Benefits of a Constant Torque Spring
Understanding the Mechanics and Benefits of a Constant Torque Spring

Time:2023-8-5

  Introduction Constant torque springs are mechanical devices that store and release energy by utilizing the torque generated by the rotation of a spring. They are commonly used in various applications such as automotive, aerospace, medical devices, and household appliances. In this article, we will explore the mechanics behind constant torque springs and the benefits they offer. Mechanics of a...

 Understanding the Function and Importance of Carbon Brush Springs
Understanding the Function and Importance of Carbon Brush Springs

Time:2023-11-10

Carbon brush springs are small but crucial components of electric motors and generators. They play a vital role in maintaining electrical contact between the carbon brushes and the rotating commutator or slip rings. These springs are typically made from high-quality carbon or copper alloys, ensuring optimal conductivity and durability. In this article, we will explore the function and importance of...

 Designing Constant Force Springs
Designing Constant Force Springs

Time:2023-6-14

Constant force springs are mechanical devices that provide a constant force throughout their deflection. They are used in a wide range of industries, including automotive, aerospace, medical, and consumer goods. These springs are designed to provide linear force, and their design is critical to their functionality. In this article, we will discuss the factors that go into designing constant force...

 Constant Force Spring Assembly: Optimizing Performance and Efficiency
Constant Force Spring Assembly: Optimizing Performance and Efficiency

Time:2023-7-4

Constant force spring assemblies are essential components in various mechanical systems, offering a unique solution for optimizing performance and efficiency. These springs are designed to provide a constant force over a wide range of deflections, making them ideal for applications that require a consistent force output throughout their operation. The design of a constant force spring assembly involves a coiled...

 Constant Force Spring Reel: The Epitome of Reliable and Consistent Force Control
Constant Force Spring Reel: The Epitome of Reliable and Consistent Force Control

Time:2023-10-21

Introduction In various industries and applications, the need for reliable and consistent force control is paramount. One such technological marvel that delivers on this requirement is the constant force spring reel. With its unique design and functionality, this device has become the epitome of dependable force control. In this article, we will delve deeper into the intricacies of this remarkable...

Product