In addition, the spring straightness of the winding spring machine is not high enough.
The standard treatment for compression springs in their set position involves compressing the spring to its solid height multiple times—typically three to five times—to ensure that it reaches the desired compressed state (both pressure and height). This process helps stabilize the free height of the spring, preventing permanent deformation under the test load. However, some manufacturers only apply a single press without fully compressing the spring to the solid height. While this method may reduce the initial height and save material, it often leads to issues such as shortening, softening, or bending during use.
Surface blasting treatment is not just about shot blasting. It involves propelling high-speed projectiles at the spring's surface to plastically deform the outer layer, creating a strengthened surface layer that enhances fatigue resistance. This process can increase the spring’s fatigue life by 20% to 35%. Unfortunately, many manufacturers either lack shot blasting equipment or only have small machines suitable for small springs. As a result, larger springs often miss out on this critical strengthening step, leading to reduced fatigue performance and a higher likelihood of failure.
During production, the transition between the tightly wound and loosely wound sections of the spring is crucial. If this transition is abrupt, the spring is more prone to bending at the junction. To prevent this, the transition should be gradual, with more intermediate turns to distribute stress evenly. However, some manufacturers take shortcuts by making a sudden shift from tight to loose coils, especially when there's a significant difference in pitch. This can cause the spring to bend or distort at the connection point.
Manual grinding of the spring ends often fails to maintain proper verticality. Some companies skip using precision grinding machines and instead rely on manual methods, which can lead to excessive tolerance deviations. Additionally, if the coiling machine lacks precision, the spring may end up with poor straightness and uneven pitch, increasing the risk of deformation and instability during operation.
Buffer ring is a common Machine element, which is used to reduce the vibration and noise generated during the operation of the machine. Buffer rings are mainly divided into two types: rubber buffer rings and spring buffer rings. Rubber buffer rings are suitable for low-frequency vibration and impact, while spring buffer rings are suitable for high-frequency vibration and impact. Buffer ring is an important Machine element, which is widely used in automobile, machinery, electronics and other fields.
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