Aluminum alloy pipes do not rust, weight is one third of steel

Aluminium alloy pipe corrosion, not a weight one third that of steel is easy to install, save the human cost, reduce the overall load structure, suitable for high-rise buildings, the scene without welding, thus ensuring the construction environment, shorten the construction period, more energy saving wall smooth, equal diameter, water resistance coefficient is small, frictional coefficient of frictional resistance is: 1/10 of the galvanized steel pipe.

Compared with steel structure, aluminum alloy structure has attracted more and more attention in structural engineering due to its advantages of light weight, corrosion resistance and easy processing. Based on the comparison between aluminum alloy as a building material and steel, this paper lists a large number of representative aluminum alloy spatial grid structures at home and abroad, and summarizes the research status of aluminum alloy spatial grid structures and node systems at home and abroad, such as aluminum alloy single and double layer reticulated shells and grids

Oblique core-pulling is one of the difficult points in die casting design for castings with oblique hole or concave and convex. The shape of pipeline casting is complex and belongs to irregular thin-walled porous casting. In addition to the core pulling in the direction of mold opening and both sides of the core pulling in the direction of moving and fixed mold, the casting inner wall also has an oblique hole, which requires the core pulling in an oblique direction.

The practical structure of die casting die for dalian aluminum alloy pipeline parts is presented. The mould adopts the two-stage joint core-pulling mechanism of hook, tooth fan and rack, and realizes the inclined core-pulling of pipe casting by using the die opening force, and at the same time realizes the other two side core-pulling of pipe casting through the corresponding two sets of inclined pin and slide block mechanisms. The mould structure is compact, the work is reliable, the molding casting quality is good.

This paper introduces and discusses the research hotspot and development of the composition design, melting, homogenization, solid solution, quenching, predrawing and aging of large specification high performance aluminum alloy materials, and puts forward some Suggestions on the development and application of this kind of aluminum alloy in China.