What is the processing technology of aluminum alloy shell? The following is a brief introduction:
1. Hydroforming technology
In recent years, high pressure forming is a new technology in the world. According to their structural characteristics, various connectors can be formed at one time by internal high pressure forming method, or profiles can be made by general extrusion method, and then the tube blank can be pressed into the die cavity by internal pressure and axial force feeding.
Because of its excellent formability and large design freedom, one hydroforming part can replace the one formed by welding several parts, so it can avoid the distortion and deformation caused by welding, and has high dimensional accuracy and mechanical properties. Its main advantages are: reducing weight and saving materials.
2. Precision die casting technology
The connecting parts of aluminum alloy body frame structure are mostly formed by casting, and some advanced high-precision casting methods, such as semi-solid die-casting, are mainly used. At present, there are two forming processes in semi-solid die casting: rheological forming and thixoforming. In the former, the liquid metal is fed into the specially designed injection molding machine barrel, and the screw device is applied to shear to cool it into semi-solid slurry, and then die-casting is carried out. In the latter, the solid metal particles or chips are fed into the screw injection forming machine, and the metal particles are transformed into slurry under the condition of heating and shearing, and then die-casting is formed.
At present, the semi-solid metal casting used in industry at home and abroad mainly refers to thixotropic casting, which is widely used in body frame structure. Thixotropic casting, as a precision forming method, has high strength after forming and can realize one-time forming of complex shapes. It can be used to mass produce all kinds of parts without cutting or little cutting, and reduce the number of parts.
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