來源：http://www.xiangbolan.com 發布時間：2022-06-11 15:23:10
Aluminum coil refers to the metal products that are sheared by the casting and rolling machine after injection molding and drawing angle processing. It is widely used in electronic devices, packaging, engineering construction, mechanical equipment and other industries. The following is a brief introduction to the production process of the product. Now let's talk about the causes of aluminum coil bending of aluminum products and the relevant contents of correct production process.
Reasons for bending of aluminum coil of aluminum products
Aluminum coil is a kind of aluminum products, which has a wide range of applications, and is deeply loved by users because of its good performance and use effect. The product can be delivered flat or rolled. In recent years, with the wide application of aluminum coil, it has gradually replaced copper strip for insulation, because compared with copper strip, this product has better rust prevention effect. However, the product will also encounter problems in use, such as bending.
The aluminum coil manufacturer believes that the main reason for the deformation is that under the condition of evaporative cooling, although the thermal conductivity at different positions of the coil is the same, due to the difference in thickness and wall shape, the heat dissipation speed at different positions is unbalanced, and the cooling speed of the thin wall is lower than that of the thick wall, which leads to the bending of the coil.
1. The cross-sectional area of the thick wall is small, resulting in small folding force;
2. The cross-sectional area of the thin-walled part is relatively large, and with the decrease of the temperature, a large retraction force is slowly formed. The ambient temperature of the thick-walled part is greatly reduced, resulting in a small or even no retraction force;
3. The temperature of the thick wall part of the aluminum coil decreases rapidly, and the folding force is formed first. The operating temperature of the thin wall part or the hollow tube part decreases slowly, and there is almost no folding force;
4. The retraction force on the cross section of the coiled material is uneven and bends to the thin wall along the extrusion;
5. After the coil leaves the paying off machine, the ambient temperature continues to decrease again, resulting in bending problems.
Analysis on production process of aluminum coil
1. Smelter processing
Aluminum ingots can be divided into three types: remelting scrap aluminum, high-purity scrap aluminum and aluminum alloy profile ingots according to their composition; According to the style and specification, it can be divided into bar ingot, round ingot, plate ingot, T-shaped ingot, etc. Aluminum is a kind of silver metallic material, and only secondary oxygen and silicon rank third in the composition of the earth's surface. The density of aluminum is only 2.7104g/cm, about 1/3 of that of steel, copper or brass.
2. Cast rolling / hot rolling
Continuous casting and rolling process means that shape memory alloy is condensed in roll continuous casting mold and processed by plastic deformation (rolling); The rolling mill process is that the aluminum coil material is condensed in the continuous casting mold and then rolled on the extruder.
3. Cold rolling
The difference between cold rolling and hot rolling is that cold rolling is rolling at the work hardening temperature, while hot rolling is rolling above the work hardening temperature. Cold rolling is mainly used for plates that cannot be heat treated. Generally, the requirements for the surface layer are high, and thin raw materials such as single zero foil and double zero foil are only cold rolled; Hot rolling is to produce blank for cold rolling, and many materials need to have high corrosion resistance, ductility and other properties, which need to be obtained by hot rolling.
4. Flat packaging
Leveling packaging is essentially a cold rolling process with low pressure reduction (0.3%-3%). Leveling can improve the shape of the strip and the verticality of the coil. By adjusting the flattening reduction rate, the physical properties of the hot rolled strip can be changed within the allowable range.
The above is the content to be explained today. I believe that after reading the description of this article, you can have a certain understanding of the product. I hope the above content can help you. In addition, if you want to learn more about our website, you can pay more attention to our website at www.jndclyyxgs com。