Ressort à force constante, also known as hair spring, is made of stainless steel strip. The force added to the spring determines the diameter, force and life of the spring. The action of constant force spring is similar to that of stretching ribbon. The spring stretches and rolls back, and the working part is tangent to the spring ‘ s own circle. As long as the diameter of the spring is certain, the force of the spring is constant.
According to the application principle of constant force spring, constant force spring can be divided into linear constant force spring and rotational constant torque spring. When linear stretching force units are : kg, Newton, pounds, etc.
Then how long can the constant force bar be used ? The life of the constant force bar is limited, and the life requirement of the spring should be considered when designing the constant force bar. This step is important because it affects the things behind the design ; improper consideration may lead the design to a wrong direction ; properly considered, the design will be easier to succeed.
It is very important to determine the number of spring stretching before designing the constant force bar. Spring stretching times explanation : a refers to the spring in any part of a stretch and roll back process. Since the constant force spring provides force through the bending of the spring, any part used belongs to the spring body. In other words, a spring with a total design length of 25 ’ uses the length of 6 ’ and the length of 18 ’, and the number of stretching is the same.
In the initial design, it is very important to determine the number of stretching. It is natural to think that the longer the service life, the better, but it may design a larger spring. If the estimated number of stretching springs is too small, the service life of the final product will be shortened. Considering the spring life needs to be based on the actual situation, because if considering too long life will lead to the design of spring cost is high, spring size becomes larger ; if the estimated life is too small, it will lead to premature failure of the product. Usually the use of constant force bar applications are from 4000 to 25000 times. If you consider higher service life, consider increasing the error range of spring diameter and force.
Shenzhen Qianye Precision Metal Co., Ltd. was established in 2006 to supply high-quality stainless steel springs for many fields. Through continuous efforts, 19 patent certificates and 4 spring equipment software copyrights have been granted by the State Intellectual Property Office, and an enviable industry influence has been built. The company designs and manufactures a wide range of power springs, constant force springs, constant torsion springs, variable force springs and motor brush spring. Qianye works in close partnership with its customers in developing bespoke solutions to meet their individual needs. In order to offer better services, it has been continuously investing in production technology and supply chain. The company itself is a stainless steel raw material manufacturer. Because of the support of raw materials, it is not subject to material restrictions when making spring products; special material requirements can be developed and manufactured; furthermore, the delivery time is greatly shortened. Quality is of the utmost importance and Qianye are certified to ISO9001, ISO14001 and national high-tech enterprise with a big emphasis on the training of its employees. Its spirit is “treat people with sincerity and create things with sincerity” to ensure it strives for excellence.
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