1. Classification
aluminium drawn tubes are mainly divided into the following types
According to the shape: square tube, round tube, pattern tube, special-shaped tube, global aluminum drawn tube.
According to extrusion method: seamless aluminum drawn tube and ordinary extrusion tube
According to the precision, it is divided into ordinary aluminum drawn tube and precision aluminum drawn tube, among which precision aluminum drawn tube generally needs to be reprocessed after extrusion, such as cold drawing and fine drawing, rolling.
According to thickness: ordinary aluminum drawn tube and thin-walled aluminum drawn tube
2, characteristics
It is a kind of high-strength hard aluminum, which can be strengthened by heat treatment. It has medium plasticity under annealing, just quenching and hot state, and has good spot weldability. When gas welding and argon arc welding are used, the aluminum drawn tube has a tendency to form intergranular cracks; aluminum The machinability of the drawn tube is good after quenching and cold work hardening, but not good in the annealed state. The corrosion resistance is not high, and anodizing treatment and painting methods are often used or the surface is coated with aluminum layer to improve the corrosion resistance. Can also be used as mold material.
3. Advantages of aluminum drawn tube
The first is the advantages of welding technology: the welding technology of thin-walled copper aluminum drawn tube suitable for industrial production is called a world-class problem, and it is the key technology for replacing copper with aluminum for connecting pipes of air conditioners.
The second is the advantage of service life: from the perspective of the inner wall of the aluminum drawn tube, since the refrigerant does not contain moisture, the inner wall of the copper-aluminum connecting tube will not corrode.
The third is the advantage of energy saving: the connection pipeline between the indoor unit and the outdoor unit of the air conditioner, the lower the heat transfer efficiency, the more energy saving, or the better the heat insulation effect, the more power saving.
Fourth, excellent bending performance, easy to install and move
4. Surface treatment
Chemical treatment: oxidation, electrophoretic coating, fluorocarbon spraying, powder spraying, wood grain transfer
Mechanical treatment method: mechanical wire drawing, mechanical polishing, sandblasting
5, use
aluminium drawn tubes are widely used in all walks of life, such as: automobiles, ships, aerospace, aviation, electrical appliances, agriculture, electromechanical, household appliances, etc. aluminium drawn tubes are everywhere in our lives.
