Cold forming springs are widely used as a type of spring, such as torsion springs, compression springs, extension springs and other large-scale components. Cold forming springs are widely used in automobiles, household appliances, office systems, IT peripherals, medical equipment and other fields.
The main material of cold forming spring is usually carbon steel and alloy steel, such as 65 mn, 60 si2mn, 51crv and other materials. Carbon steel is characterized by good elasticity, wide use temperature range, good fairness and erosion resistance performance, and low cost. Alloy steel is characterized by good work hardening and better fatigue strength, good tempering stability and low distortion in heat treatment and higher cost. Compared with hot forming springs, cold forming springs have higher standard size accuracy, longer service life and lower cost.
Cold forming spring is made of blank parts by bending, pointing, inserting and stretching, and then formed by special cold forming equipment. Cold formed springs are generally made from a sheet or strip of high quality spring steel, either pre-tempered or pre-hardened. The basic shape of the cold formed spring is formed by bending, profiled surface is created by stamping under high speed and pressure, and mechanical surface is generated by machining and grinding. Cold forming spring can be made of variety of shapes and sizes. Generally, the surface of torsion spring is plane, and the surface of compression, extension spring and large spring component is highly complex plane. In addition, the two ends of the spring can also be finished with various forms of grounding.
Cold forming springs have some characteristics which make them widely used in different industrial fields.
First, the material of part is more efficient. Compared with metal materials commonly used in hot forming process, cold forming can achieve higher technical requirements, such as spring shape and size, by adopting special alloy materials. Cold forming spring material can be pure metal and alloy. Different materials are selected according to the performance requirements of different parts to reduce the weight of parts, increase the strength and improve the life of the parts.
Second, the machining accuracy is higher. The accuracy under high requirement of cold forming process is higher than that of hot forming. The accuracy of parts of trapezoidal torsion spring, straight torsion spring, conical spring and other complex shape springs can reach 0.02MM. It can ensure that the specified components do not have flaws and ensure the quality of the component parts.
Third, the waste of parts is less. The cold forming process is carried out at room temperature, so the original material material will not deform, and the manufacturing cost of the component is lower than that of the hot forming process. Therefore, cold forming can effectively reduce the loss of raw materials and lower the production cost.
In summary, cold forming spring has the advantages of high machining accuracy, low material wastage, use of various types of materials and stable processing quality, so it is widely used in automotive, office systems, IT peripherals, medical equipment and other industries. In order to ensure the production quality of cold formed springs, special attention should be paid to the selection of materials, the selection of processing parameters and the selection of quality inspection equipment.
