What is the introduction of the aluminum tube?
Aluminum pipe is a type of non-ferrous metal pipe. It refers to a metal tubular material that is extruded from pure aluminum or aluminum alloy and is hollow along its entire longitudinal length. Aluminum tubes can have one or more closed through holes, have uniform wall thickness and cross-section, and are delivered in straight lines or rolls. Classification of aluminum tubes: (1) According to appearance: square tube, round tube, pattern tube, special-shaped tube, global aluminum tube
Aluminum tube refers to a metal tubular material that is extruded from pure aluminum or aluminum alloy into a hollow metal tube along its entire longitudinal length. It can have one or more closed through holes, with uniform wall thickness and cross-section, and is delivered in straight line or roll form.
Let’s learn about the classification of aluminum tubes:
According to appearance: square tube, round tube, pattern tube, special-shaped tube;
According to the extrusion method: seamless aluminum tube and ordinary extrusion tube;
According to accuracy: ordinary aluminum tubes and precision aluminum tubes. Precision aluminum tubes generally need to be reprocessed after extrusion, such as cold drawing, fine drawing, and rolling;
According to thickness: ordinary aluminum tubes and thin-walled aluminum tubes;
Aluminum pipes have the advantages of corrosion resistance and light weight. They are widely used in various industries, such as automobiles, ships, aerospace, aviation, electrical appliances, agriculture, electromechanical, home furnishing, etc.
The advantages of aluminum tubes themselves:
Technical advantages: The welding technology of thin-walled copper and aluminum pipes suitable for industrial production is the key technology for replacing aluminum with copper in air conditioner connecting pipes.
Service life advantage: From the perspective of the inner wall of the aluminum tube, since the refrigerant does not contain moisture, corrosion will not occur on the inner wall of the copper-aluminum connecting tube.
Energy-saving advantages: The lower the heat transfer efficiency of the connecting pipeline between the indoor unit and the outdoor unit of the air conditioner, the more energy-saving it is.
Excellent bending performance, easy to install and move.
Anodizing of aluminum tubes is generally carried out in acidic electrolyte, with aluminum as the anode. During the electrolysis process, oxygen anions interact with aluminum to produce an oxide film. This film is not dense enough when it is first formed. Although it has a certain resistance, the negative oxygen ions in the electrolyte can still reach the aluminum surface and continue to form an oxide film. As the film thickness increases, the resistance also increases and the electrolysis current becomes smaller. At this time, the outer oxide film in contact with the electrolyte is chemically dissolved. When the rate of oxide formation on the aluminum surface gradually balances with the rate of chemical dissolution, the oxide film can reach the thickness under this electrolysis parameter. The outer layer of the anodized aluminum film is porous and can easily absorb dyes and colored substances, so it can be dyed to improve its decorative properties. After the oxide film is sealed with hot water, high-temperature water vapor or nickel salt, its corrosion resistance and wear resistance can be further improved.
As an important industrial, construction, and automotive profile, extruded aluminum tubes are widely used in various industries. The forming methods of aluminum alloy profiles include extrusion, casting, forging, etc. The forming methods are also different for aluminum alloy profiles with different structural shapes. Extruded aluminum tube In order to obtain aluminum alloy profile extruded parts with excellent comprehensive properties, many scholars at home and abroad have conducted in-depth research on the characteristics related to aluminum alloy extrusion. Among them, Li Guizhong’s extruded aluminum tube has carried out high-strength aluminum alloy thin-walled longitudinal reinforcement components. Analyze the extrusion forming rules and study its process optimization; use numerical simulation methods to analyze the extrusion forming of hollow aluminum alloy profiles, and use experimental methods to verify the simulation; use numerical simulation methods to analyze complex Simulate the extrusion process of aluminum profiles and optimize the die structure; design a large 7005 aluminum alloy extrusion die and study its processing technology; extrusion aluminum tubes for aluminum alloy profiles in Pro/E Numerical simulation of forming and optimization of extrusion mold structure; research on the core stability of 6061 aluminum alloy plane split die; use of numerical simulation method to research on extrusion of large hollow section aluminum profiles; extrusion In the aluminum alloy profile extrusion forming simulation model, the aluminum tube is mainly composed of extruded round rods, guide holes, welding chambers, work belts, extruded profiles, etc. The heated extruded round rods play a role in the extrusion force It enters the welding chamber through the diversion hole. The aluminum profile in the welding chamber is extruded through the work belt under the action of extrusion force and formed into the target aluminum alloy profile. Set the heat transfer mode between materials to thermal convection, and the heat transfer coefficient is 3000 W/(m2·℃). The specific heat capacity of the material is 904J/(kg·℃). Set the room temperature to 25℃, and the billet heating temperature to 480℃. The mold preheating temperature is 390, 420, 450, 480℃, the extrusion cylinder temperature is 445℃, the extrusion speed is 1, 2, 3, 4, 5, 6, 7 mm/s, the aluminum alloy material and the mold and work The friction coefficient between the strips is 0.3. The quality and performance of aluminum alloy curved profiles formed by extrusion-bending integration were studied and analyzed; a large, complex and precise extrusion die for rail train body profiles was developed and Simulation analysis of extrusion forming characteristics. Based on the in-depth research and analysis of aluminum alloy profile extrusion and extrusion molding by many scholars, a certain type of aluminum alloy profile was used as the object to conduct numerical simulation of aluminum alloy profile extrusion based on Hyper Xtrude, and analyzed the extrusion The influence of press forming process parameters on the extrusion characteristics of aluminum alloy profiles provides reference for aluminum alloy extrusion forming, die optimization, etc.
What is the difference between aluminum tubes and aluminum alloy tubes?
1. Different references
1. Aluminum tube: Pure aluminum or aluminum alloy is extruded into a hollow metal tubular material along its entire longitudinal length.
2. Aluminum alloy pipe: Aluminum and other metals are processed into centrally controlled metal tubular materials.
2. Different characteristics
1. Aluminum tube: It is a kind of high-strength hard aluminum that can be strengthened by heat treatment. It has medium plasticity in annealing, fresh quenching and hot conditions, and has good spot welding properties. The aluminum tube may form intergranular cracks when gas welding and argon arc welding are used. tendency; the machinability of aluminum tubes is good after quenching and cold work hardening, but poor in the annealed state.
2. Aluminum alloy pipe: Aluminum alloy has low density, but relatively high strength, close to or exceeding high-quality steel. It has good plasticity and can be processed into various profiles. It has excellent electrical conductivity, thermal conductivity and corrosion resistance. It is widely used in industry. Its usage is second only to steel.
3. Different uses
1. Aluminum tube: used in various industries, such as: automobiles, ships, aerospace, aviation, electrical appliances, agriculture, electromechanical, home furnishing, etc.
2. Aluminum alloy pipe: It has been widely used in aviation, aerospace, automobile, machinery manufacturing, shipbuilding and chemical industries.
