Aluminum extrusion profile
The aluminum extrusion profile process is a technique where aluminum alloy is extruded through a press to form a desired shape. First, aluminum alloy billets are heated to 400 to 500 degrees Celsius to soften them and facilitate extrusion. The heated billets are then placed in an extrusion press and pushed through a die of a specific shape to form the desired profile. The extruded aluminum profiles need to be quickly cooled, using methods such as air or water cooling. To eliminate internal stresses, the profiles undergo stretching to maintain linearity and enhance mechanical properties. After cooling and stretching, the aluminum extrusions are cut into specific lengths based on customer requirements. Depending on the material and application needs, the aluminum profiles may undergo heat treatments such as solution treatment and aging to further improve their properties.
Post-extrusion CNC machining is crucial as it significantly enhances the precision and shape flexibility of the products. Aluminum extrusions typically have fixed cross-sectional shapes from the extrusion process, but CNC machining allows for high-precision cutting, drilling, and engraving to achieve more complex designs and special requirements. Moreover, CNC machining provides the necessary finishing touches to ensure the functionality and consistency of the final products. This method also supports customization, making the products more suitable for specific applications, thereby improving the overall product quality and reliability.
We offer CNC machined aluminum extrusion profile products, contact us for more details of one-stop service of customized aluminum products.
Applications of Aluminum Extrusion Process in Various Industries
The grades of aluminum extrusion materials vary according to different national and regional standards. Below are common European, American, and Japanese standard aluminum alloy grades:
EN Standards
- EN AW-1050
- EN AW-6060
- EN AW-6082
- EN AW-7075
- EN AW-2011
- EN AW-2024
- EN AW-5052
- EN AW-5083
AA Standards
- AA 1100
- AA 6061
- AA 6063
- AA 7075
- AA 2011
- AA 2024
- AA 5052
- AA 5083
JIS Standards
- JIS A1050
- JIS A6063
- JIS A6061
- JIS A7075
- JIS A2011
- JIS A2024
- JIS A5052
- JIS A5083
Each of these grades has its own characteristics, suitable for different industrial applications and manufacturing requirements.
Advantages and disadvantages of aluminum extrusion processes and CNC machining applications：
【Advantages】
- High Production Efficiency:
Aluminum extrusions can be produced quickly and in large quantities with fixed cross-sectional shapes, saving processing time and costs.
- Low Cost per Unit:
Aluminum extrusions are suitable for mass production, resulting in a low cost per unit, especially when producing a large volume of standard profiles.
- Standardized Die Design:
The fixed cross-sectional shape design standardizes dies, providing a cost advantage for large-scale production.
- Suitable for Standard Profile Production:
Effectively manufactures consistent length standard profiles, suitable for applications such as building profiles and frames.
【Disadvantages】
- Limited Design Flexibility:
The shape of aluminum extrusions is fixed, making it difficult to change designs or manufacture non-standard shapes.
- High Initial Mold Cost：
Mold fabrication costs are expensive, making it not cost-effective for small batch production.
The aluminum extrusion process has advantages in mass production and standard profile production, but there are certain limitations in design flexibility and initial investment costs. CNC machining can provide further processing and fine-tuning on the basis of aluminum extrusions, offering greater design freedom and precision. The combined use of both can achieve an optimal balance of cost-efficiency and manufacturing flexibility.
After CNC machining, aluminum extrusions typically require surface treatment to enhance their appearance, durability, and performance. Here are some common surface treatment techniques:
- Anodizing
- Sandblasting
- Vibration & Polishing
- Electroplating
- Laser Engraving
- Electrophoretic Coating
- Electroetching
- Phosphating
- Chemical Polishing
- Powder Coating
- Passivation
These surface treatment techniques can be selected based on the environmental conditions, performance requirements, and aesthetic needs of the aluminum extrusions, thereby enhancing the overall performance and appearance of the material.
