The thickness of the aluminum sheet for ceiling fan blades typically ranges from 1.0mm to 2.0mm, with the specific choice depending on the size of the ceiling fan, design requirements and expected strength. Aluminum sheet has a density of approximately 2.7g/cm³, making aluminum ceiling fan blades lighter than those made of steel or other metals. This effectively reduces the overall weight of the ceiling fan, lowers the load on the motor and suspension structure, and extends the fan’s lifespan.
Common used alloys of aluminum sheets for ceiling fan blades are 1100, 3105, 5052, and 6061 aluminum sheets, typically indicated by tempers such as H18 and H16. Here is a brief introduction to them:
1100 aluminum is industrial pure aluminum, containing almost no other alloying elements. Its core characteristics are “easy processing, low cost, and lightweight,” making it an “economical choice” for ceiling fan blades. With good plasticity, it is easy to shear, bend, and stamp, requiring no complex heat treatment processes. It can easily be made into various curved fan blades, resulting in high production efficiency and suitability for mass production at low cost. Its density is only 2.71 g/cm³, slightly lighter than 5052 and 6061 aluminum sheet, further reducing the overall weight of the ceiling fan, decreasing motor load, and improving smooth operation at low speeds. Pure aluminum has a simple smelting and processing process, and its raw material price is lower than alloy aluminum sheets, making it suitable for cost-sensitive household ceiling fans.
3105 is an aluminum-manganese alloy, falling between pure aluminum (such as 1100) and aluminum-magnesium alloys (such as 5052). Its core characteristics are “moderate strength and balanced cost-effectiveness.” Superior strength to 1100: The addition of manganese increases tensile strength to 160-180 MPa, offering better fatigue resistance and rigidity than 1100. This results in better blade stability during rotation, reducing vibration and making it suitable for larger diameter ceiling fans (e.g., 1.2-1.4m). Good plasticity allows for easy stamping, bending, and welding without requiring complex equipment, leading to high production efficiency. It also boasts a smooth surface finish, facilitating subsequent painting and coating treatments. Manganese enhances the alloy’s corrosion resistance, particularly in marine climates and humid environments, providing more stable corrosion resistance and a longer service life than 1100. Priced only slightly higher than 1100 aluminum sheet, its significantly improved strength and stability make it a balanced choice for “low cost + sufficient strength.”
This is a medium-strength aluminum alloy, with magnesium as its main alloying element. It is lightweight, high-strength, and corrosion-resistant, while also possessing good formability, weldability, and fatigue resistance. It effectively reduces the overall weight of the ceiling fan while maintaining sufficient strength, improving operating efficiency. It also ensures stable operation of the blades for extended periods in harsh environments. Furthermore, it is relatively affordable, easy to process, and meets the requirements of sustainable development, thus being widely used in the manufacture of industrial ceiling fan blades.
Belonging to the Al-Mg-Si heat-treatable alloy system, it possesses high strength and good extrusion and corrosion resistance. Its tensile strength increases with increasing solution treatment temperature and complete solution treatment of the molten atoms. After T6 heat treatment, its mechanical properties are even better. Although 6061 aluminum plate is commonly used to make ceiling fan blade handles and accessories, some ceiling fan blades are also made of this material to meet the needs of scenarios requiring high blade strength.
To improve the aesthetics and corrosion resistance of aluminum ceiling fan blades, surface treatment is typically performed. Common surface treatment methods include anodizing, spraying, and electrophoretic coating. Anodizing forms a high-hardness, wear-resistant, and brightly colored oxide film on the aluminum surface; spraying and electrophoretic coating provide various colors and textures to meet different decorative needs.
Performance advantages of aluminum sheets for ceiling fan blades:
Good strength and rigidity:
Despite its light weight, aluminum, through proper alloy design and processing, possesses sufficient strength and rigidity to withstand the various forces and vibrations generated during ceiling fan operation, ensuring blade stability and safety.
Good heat dissipation:
Aluminum has good thermal conductivity. During ceiling fan operation, the heat generated by the motor can be conducted away through the blades, helping to reduce motor temperature, improve heat dissipation efficiency, and extend motor lifespan.
Low noise:
The smooth surface of the aluminum sheet results in low frictional resistance with the air during operation, leading to relatively low noise. Meanwhile, the moderate modulus of elasticity of aluminum effectively absorbs and buffers vibrations, further reducing the noise level of the ceiling fan during operation.
Applications of aluminum ceiling fan blades:
– Home environment:
In living rooms, bedrooms, and other similar spaces, aluminum ceiling fan blades are a common choice due to their aesthetic appeal and excellent performance. They can complement various decorating styles, adding warmth and comfort to the home environment.
– Commercial venues:
In restaurants, hotels, shopping malls, and other similar locations, the high airflow and low noise characteristics of aluminum ceiling fan blades meet the ventilation and comfort requirements of these spaces. Furthermore, their diverse surface treatments and design options enhance the overall quality and image of the venue.
– Industrial environments:
In industrial plants, warehouses, and other locations with high ventilation requirements, the corrosion resistance and high strength of aluminum ceiling fan blades allow them to withstand harsh working environments, providing excellent ventilation for industrial production.