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Stamped parts are the foundation of the car body, and the stamping of automotive hardware stamping parts directly affects the quality of the car body. The white body is also an important component of the car, which determines the production and sales prospects of new models. In this sense, the quality of stamping parts is very important, and almost all design stages of new models are related to it, including the matching of chassis components The design of the interior is also based on the white body, which is a stamped part. In modern new car models, there is a new model that maintains the chassis and other components unchanged, only changing the structure of the body to achieve the new model. From this point, we can also see the importance of stamping parts.
The body is the purpose of stamping parts. In actual production, stamping parts are usually welded into individual components in the welding factory, and then these components are welded into individual sub assemblies. Next, these sub assemblies are welded into a white body on the assembly platform, which is adjusted, installed with engine covers, fenders, doors, etc. to form a complete white body. Therefore, the purpose of stamping parts is to form a complete white body.
The materials used for stamping parts are generally metal materials, which mainly require lightweight body, strength and stiffness, continuously improving performance, riding comfort, and appearance quality. Although the research and application of lightweight materials have become increasingly widespread in recent years, steel plate materials maintain their position as body materials due to their own performance advantages, accounting for about 70% of the vehicle's steel materials. The main advantage of steel plate materials is low cost, especially compared to plastics and light alloys. Secondly, steel plate materials have low processing difficulty, mature forming processes, easy recycling, and less environmental pollution.
Metal materials are commonly used in modern car bodies, with the advantages of being less prone to cracking during deep drawing and easier to process. Overall, the steel plates used for car bodies should have good drawing performance, low yield point, large elongation, good weldability and coating properties, and good surface smoothness.
Steel plate is a material that requires a large amount of stamping parts for car bodies, and there are many types of steel plates. In car design, different performance steel plates should be selected based on the requirements of the car body. For example, galvanized steel plates should be used in areas with high requirements, and steel plates should be used in areas with high stress.
(1) Cold rolled steel plate
According to current standards, steel plates are divided into two types: thin plates and thick plates. Steel plates with a thickness less than 4mm are called thin plates, while the rest are called thick plates. Rolling thin plates are divided into two types: cold-rolled steel plates and hot-rolled steel plates. Among them, cold-rolled steel plates have the advantages of size, flat surface, low yield point, and good formability.
(2) Hot-rolled steel plate
The composition of hot-rolled steel plate is basically the same as that of cold-rolled steel plate, but its mechanical properties, surface condition, and dimensional accuracy are not as good as cold-rolled steel plate. It is generally used for thick and non appearance parts of the plate.
(3) Stainless steel plate
The characteristic of stainless steel plate is that its strength and hardness are higher than ordinary steel plate, so its stamping processing force is also relatively large; Secondly, its surface is smooth and clean, which is beneficial for some stamping parts with high surface requirements. However, hardware stamping parts are prone to scratches during stamping forming, and stainless steel plate stamping parts are no longer painted after forming. Therefore, surface scratches are a prominent problem in stainless steel parts stamping processing. Currently, engineering is focusing on this issue