With the rapid development of the automobile industry, lightweighting has become an important research topic. In order to reduce fuel consumption and improve driving performance, it is necessary to reduce the weight of automobiles. Aluminum profiles have become an important material for automobile lightweighting due to their excellent properties such as light weight, high strength and good corrosion resistance. Aluminum profiles are widely used in automobiles. The main application areas are body frame, engine parts, transmission parts and suspension system. For example, aluminum alloy is used for the body frame of a car. Compared with traditional steel materials, aluminum alloy has higher strength and lighter weight, which can effectively reduce the overall weight of the car and improve its performance. In addition, aluminum alloy can also be used to make engine parts such as cylinder head covers and intake manifolds. These components made of aluminum alloy have better heat dissipation performance than those made of other materials, which can improve engine power output and fuel economy. Aluminum alloy is also widely used in transmission parts such as gearbox housing and differential housing due to its excellent mechanical properties. In addition, aluminum alloy is also used in suspension systems such as shock absorbers due to its good damping performance. In addition to being used in cars directly, aluminum profiles are also widely used in automotive manufacturing processes such as die casting and extrusion forming. Die casting is a process that injects molten metal into a mold cavity under pressure to obtain a certain shape part or product with complex structure. Aluminum alloys are often used for die casting because they have good fluidity at high temperatures and can be cast into complex shapes with high precision at one time. Extrusion forming is a process that uses a press machine to push metal through a die with an opening of a certain shape to obtain products with uniform cross-section shape and size. Aluminum alloys are often used for extrusion forming because they have good plasticity at high temperatures and can be extruded into various shapes with high precision at one time. In summary, aluminum profiles have been widely used in automobile lightweighting due to their excellent properties such as light weight, high strength and good corrosion resistance. They are not only directly applied in automobiles but also extensively utilized in automotive manufacturing processes such as die casting and extrusion forming, which greatly improves the efficiency of automobile production while reducing costs at the same time