According to incomplete statistics, at present, the annual consumption of aluminum alloy profiles in the world is more than 15 million tons, with more than 10000 specifications and varieties. The scientific and reasonable classification of aluminum alloy profiles is conducive to the scientific and rational selection of production technology and equipment, the correct design and manufacture of tools and dies, and quickly deal with the professional technical problems and production management problems of the extrusion workshop.
1. Classified by use or use characteristics, aluminum alloy profiles can be divided into general profiles and special profiles can be divided into: (1) aerospace profiles: such as integral stiffened panels, I girders, wing girders, comb profiles, hollow girder profiles, etc. mainly used for aircraft, spaceships and other aerospace aircraft structural components, helicopter special-shaped hollow rotor girder and aircraft runway and so on. (2) vehicle profiles: mainly used as the overall shape, structural components and important mechanical parts and decorative parts of vehicles such as high-speed trains, subway trains, light rail trains, double-decker passenger cars, luxury buses and trucks. (3) profiles for warships and weapons: mainly used for the superstructure and decks, clapboards and floors of ships, warships, aircraft carriers, motorboats and hydrofoils, as well as integral shells and important stress components of tanks, armored vehicles, personnel carriers, etc. shells of rocke
