As a classic mechanical element, the coil spring occupies an important position in various mechanical structures due to its efficient energy storage and stable rebound characteristics. It converts mechanical energy into elastic potential energy for storage and quickly releases it when needed, providing stable power support for mechanical equipment. The design of the coil spring is flexible and diverse, and its parameters such as stiffness, stroke and load can be adjusted according to specific needs to meet the use requirements under different working conditions. At the same time, its excellent rebound performance and durability also ensure the stability and reliability of mechanical equipment in long-term use. Therefore, coil springs have been widely used in automobiles, industrial machinery, electronic equipment and other fields.