In the automotive industry, the lightweight structure of the vehicle is a key factor in improving fuel efficiency, reducing emissions and improving the dynamic performance of the vehicle. Because of its light weight, high strength and good corrosion resistance, aluminum profiles have been widely used in modern automobile design. Among them, the curved profile of the automobile body is applied to the body structure, suspension system components, chassis and frame components, interior structure components, powertrain components, external decorative parts, roof beams and other key structures.