Aluminum has become an increasingly significant material in modern industry, thanks to its numerous properties, including lightness, strength, and corrosion resistance. Another important feature is its machinability, making it ideal for processes like milling. However, it’s important to note that not all aluminum alloys are the same. Let’s explore which types of aluminum are best suited for milling.
Factors to Consider When Choosing Aluminum for Milling
Aluminum is generally a material with excellent machinability. However, the quality of milling doesn’t depend solely on the material itself; the conditions under which the machining takes place are equally important. Key factors include the material of the cutting tool, the geometry of the cutting edges, and the cooling method used. Below are some aluminum alloys preferred for milling, but even with these, improper machining techniques can lead to unsatisfactory results.
Aluminum PA7
This alloy offers an excellent strength-to-weight ratio and great machinability. However, it is not without its drawbacks. During machining, PA7 tends to chip easily, and it also has relatively low corrosion resistance. Despite this, its ease of machining makes it a popular choice for many applications.
Aluminum PA43
In contrast to PA7, PA43 is highly resistant to corrosion, making it suitable for components used in marine environments. Milling this alloy requires high cutting speeds and large feed rates. Proper lubrication is also crucial. If incorrect parameters are used, surface finish may suffer, and material buildup on the milling tool can occur, leading to inefficiencies.
Aluminum PA45
Among all aluminum alloys, PA45 is the most commonly chosen for machining. It is widely used to manufacture various components, including those for the aerospace industry. Despite its popularity, machining PA45 can pose risks, as it has a tendency to produce hazardous chips during the cutting process.
Conclusion
Milling aluminum requires not only knowledge of the material but also the right machining techniques. For optimal results, it’s best to entrust this task to professionals who can ensure the proper parameters and methods are used. By choosing the right alloy and applying appropriate techniques, aluminum can be machined effectively to meet the demands of various industries.