From the perspective of "accuracy and surface quality", there are the following significant differences between the hot forming and cold forming processes used in manufacturing spring machines:
thermoforming process
Accuracy level: During the thermoforming process, because the material is in a high temperature state, although its plasticity and fluidity are enhanced, it also increases the uncontrollability of material deformation. This uncontrollability may result in a relatively low accuracy level of the formed spring, especially when the shape is complex or the size requirements are strict.
Surface quality: The heating process not only changes the physical state of the material, but also easily causes oxidation and decarburization of the material surface. Such surface defects not only affect the appearance of the spring, but may also adversely affect the corrosion resistance and mechanical properties of the spring. Therefore, the surface quality of hot-formed springs is generally not as good as that of cold-formed springs.
cold forming process
Precision level: The cold forming process is performed at room temperature, and the deformation process of the material is more controllable. Modern cold forming spring machines are usually equipped with high-precision processing equipment and control systems, which can ensure that the formed springs have extremely high dimensional accuracy and shape accuracy. This is particularly important for spring applications where high precision requirements are required.
Surface quality: The cold forming process avoids surface defects such as oxidation and decarburization that may occur during the heating process. During the cold forming process, the surface quality of the material is well maintained and can even be further improved through subsequent polishing, shot peening and other treatments. Therefore, the surface quality of cold-formed springs is usually better and can meet spring applications that have higher requirements on surface quality.
From the perspective of "precision and surface quality", there are significant differences between hot forming and cold forming processes when manufacturing spring machines. Although the hot forming process can enhance the plasticity and fluidity of the material, it may result in a relatively low precision level and poor surface quality of the formed spring; while the cold forming process can ensure that the formed spring has high precision and good surface quality. , especially suitable for spring applications with high requirements on accuracy and surface quality.