How Is Roll of Aluminum Sheet Produced?

The roll of aluminum sheet production is a complex and delicate system engineering, involving a number of links, mainly including the following steps:

• 1. Raw material preparation

– Aluminum raw materials: high-quality aluminum raw materials is the basis for the production of aluminum coil, mainly including aluminum ingots, aluminum scrap recycling materials and alloy additives. Aluminum ingots as the main raw material, its purity and chemical composition directly affect the performance of the final product. Aluminum scrap is recycled through strict sorting, crushing, smelting and other processes to achieve resource recycling and reduce production costs. Alloy additives are used to adjust the hardness, strength, corrosion resistance and other characteristics of aluminum to meet the needs of different areas of use.

• 2. Melting and casting

– Melting: Aluminum raw materials are put into the melting furnace and heated to a molten state at high temperature. In this process, the furnace temperature, melt stirring and degassing and deslagging operations need to be strictly controlled to ensure the purity and uniformity of the melt.

– Casting: The molten aluminum liquid is introduced into the casting machine to form aluminum billet through continuous casting process. Casting process, the cooling rate, mold design and casting parameters of the control is critical, they directly affect the internal structure of the aluminum billet and surface quality.

• 3. Hot rolling and cold rolling

– Hot rolling: the casting of aluminum billet heated to the appropriate temperature to improve its plasticity and reduce the deformation resistance. Subsequently, the aluminum billet is sent to the hot rolling mill, under the action of a strong rolling force, after a number of rolling, and gradually calendered into the required thickness of the aluminum coil. Hot rolling process, temperature, rolling speed, under pressure and other parameters of the precise control, to ensure that the dimensional accuracy, surface quality and internal organization of the aluminum coil is critical.

– Cold Rolling: On the basis of hot rolled aluminum coil, it is further processed by cold rolling mill to obtain thinner and more accurate thickness and flatness of aluminum coils. During the cold rolling process, the aluminum coil is continuously rolled at room temperature and is thinned through multiple passes to finally reach the thickness specification required by the customer. Cold rolling can not only significantly improve the dimensional accuracy and surface finish of the aluminum coil, but also refine the grain through cold rolling deformation, improve the mechanical properties of the material.

• 4. Heat treatment

– Annealing: The aluminum coil after cold rolling is annealed to eliminate internal stress and improve the mechanical properties of the material.

• 5. Surface treatment

In order to improve the surface quality of aluminum coil, to meet the specific needs of use, often need to carry out surface treatment. Common surface treatment methods include anodized, electrophoretic coating, spraying and so on. Anodized through electrochemical action, the formation of a dense layer of aluminum oxide film on the surface of the coil, to improve corrosion resistance and decorative; electrophoretic coating using the principle of electrophoresis, the surface of the coil uniformly deposited a layer of colorful, weather-resistant paint film; spraying is through the spray gun will be sprayed on the surface of the aluminum coil, the formation of a protective layer and decorative layer.

• 6. Cutting and Packing

– Cutting: According to the customer’s demand, the aluminum coil is cut into rolls of specific width and length. During the cutting process, the dimensional accuracy should be strictly controlled to ensure that the product meets the specifications.

Packing: After cutting, the aluminum coils are carefully packed to prevent damage during transportation and storage.

• 7. Inspection and Quality Control

In the entire production process, including raw materials, melting and casting, hot rolling, cold rolling, surface treatment and cutting and packaging and other links, need to carry out strict inspection and quality control. Raw materials need to be analyzed for chemical composition and physical property tests; melt casting process needs to be carried out to monitor the quality of the melt and billet quality checks; hot rolling, cold rolling and surface treatment processes need to be carried out in a variety of dimensional accuracy, surface quality, mechanical properties and other aspects of the test. In addition, the finished product also needs to be sampling inspection and performance testing to ensure product quality in line with national and industry standards.

In summary, the roll of aluminum sheet production is a systematic project involving multiple links and complex processes. Through strict quality control and technological innovation, high-quality, high-performance aluminum coil products can be produced to meet the needs of different areas of use.