The weight of the car body accounts for about 40% of the total weight of the car. The weight reduction of the car body plays an important role in the lightweight of the car. The lightweight of the car body is becoming the frontier and hot spot of the 21st century car technology.
The lightweight body of the car is a systematic project. There are two ways to reduce the weight of the car body: one is to choose new materials with light weight and high strength; the other is to design a more reasonable body structure according to the characteristics of new materials, so that the parts are thinned. Hollowing, miniaturization, compositing, and structural and process improvements to body parts.
The above two approaches complement each other and must be combined with material replacement and structural improvement in order to ensure that the strength, stiffness, modality, fatigue, collision safety and anti-vibration and impact resistance of the vehicle body meet the design and application requirements. Limit the overall weight of the car.
Aluminum alloy is a lightweight material with a variety of excellent properties, making it the material of choice for lightweight vehicles. The basic form of the aluminum body is composed of a variety of complex sections of aluminum alloy extruded profiles, the die-cast aluminum parts are used as the joints of the space frame joints, the body cover parts are stamped and processed by aluminum alloy plates, and the reinforcing plates of some load-bearing cover parts are also squeezed. The aluminum profile is pressed, and the connection between the cover and the frame is completed by riveting with a punching rivet to form a structurally strong whole.
Metal processing online reporter believes that aluminum body manufacturing technology is the first key technology for energy-saving cars, and belongs to the category of “light alloy material manufacturing technologyâ€, one of the ten key technologies proposed by the national science and technology major project. Its implementation is strong for China. The state has great significance and takes into account the needs of energy conservation and environmental protection and the sustainable development of the automotive industry.
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