A Complete Guide to Aluminum Profiles: Differentiation, Properties, Accessories, and Strength Calculation
Through this article, you'll gain a deep understanding of various aspects of aluminum profiles, including how to distinguish between national and European standard aluminum profiles, master the basic properties and common knowledge of aluminum profiles, understand all aluminum profile accessories, learn how to calculate aluminum profile strength, and answer common questions about aluminum profile usage. This article also introduces commonly used aluminum profiles and their classifications, helping you better understand and select aluminum profiles. Aluminum profiles are primarily divided into two categories: European standard and national standard. These differ in their channel-shaped and right-angled shapes. See the figure below for details.
1. Common aluminum profile specifications include the 15, 20, 30, 40, 45, 50, and 60 series.
2. Regarding materials, we offer a variety of options:
A2011, an aluminum-copper alloy, is known for its excellent workability and strong corrosion resistance.
A2017, also an aluminum-copper alloy, is characterized by high strength and good workability and is often classified as duralumin. A5052, a representative aluminum-manganese alloy, combines moderate strength with high fatigue resistance and excellent seawater resistance.
A5056, also an aluminum-manganese alloy, is known for its excellent seawater resistance and good machinability.
A6061, a member of the aluminum-manganese-silicon alloy family, achieves excellent corrosion resistance after T6 treatment.
A6063, while slightly lower in strength than A6061, offers superior extrudability, enabling the fabrication of a variety of complex cross-sectional shapes while also offering excellent corrosion resistance and surface finish.
A7075, an aluminum-zinc-manganese alloy, boasts exceptional strength among aluminum alloys, but its corrosion resistance is relatively poor, often classified as an ultra-hard aluminum alloy.
3. Wall Thickness Selection: The wall thickness of aluminum profiles produced by different manufacturers may vary, but common specifications include 1.5, 1.8, 2.0, 2.5, 3.0, 3.2, 3.5, and 4.0. 4. Type Classification:
Next, let's understand two key points:
Regarding the axial hole design of aluminum profiles, the hole position generally follows the standard for threaded bottom holes, meaning that tapping can proceed directly without any additional adjustments.
When selecting T-nuts, simply focus on the model, thread size, and material. The nut's shape will automatically match the slot size, making operation simple.
Note: In the image above, the letters following the 4040 aluminum profile indicate different thicknesses and weights. Selection should be based on actual needs. For example, even within the same model, the 4040 profile has a wide variety of specifications, and the applicable ranges of aluminum profiles of different thicknesses vary. The following are common applications for various thicknesses of aluminum profiles:
1.5mm: Suitable for frame assemblies with low stress and force, such as workbenches and production management signage frames in assembly line workshops.
2.0mm: Used in frame structures requiring a certain degree of strength but not heavy loads.
2.5mm: Suitable for medium-strength and load-bearing applications.
3.2mm and 4.0mm are suitable for frame structures with high stress and strength, such as equipment rack frames.
In addition, when selecting aluminum profiles, it's important to consider the accompanying accessories to ensure the integrity and stability of the frame.
There are several key points worth exploring when choosing accessories. First, the nuts. Profile nuts come in a variety of designs to meet different installation requirements and adapt to various working conditions.
Regarding cover design, to ensure aesthetics and a non-protruding appearance, allowance should be made for the cover's thickness when joining. Furthermore, this should be clearly marked on the assembly drawing to prevent errors by the assembler. Furthermore, most of the accessories required for connecting aluminum profiles are standardized, greatly simplifying the selection process. However, the industry typically measures the load-bearing capacity of aluminum profiles by deflection. Misumi offers two calculation methods: one is a simple chart-based method, but it's important to note that it only applies to Misumi brand profiles.
There are several key points to keep in mind:
The calculation process must follow certain steps to ensure accuracy. As long as the calculated deflection is less than 1/1000 of the operating length, the deflection meets the requirements. For example, if the operating length is 500mm and the calculated deflection is 0.4, the requirement is met (0.4 is less than 0.5), but safety factors should still be considered and an appropriate safety factor should be set.
How do we use the above table for calculations? First, we need to determine several key parameters: the load (in N), the preselected aluminum profile specifications, and the operating length (L) of the aluminum profile (in mm). Second, we need to consider the installation method of the aluminum profile, which directly affects the deflection calculation results. Generally, the more stable the support method, the smaller the calculated deflection. The optimal support method is fixed at both ends.
3.
Next, we can perform a detailed calculation based on the above key parameters. First, determine the load (N) and the preselected aluminum profile specifications; these form the basis for the calculation. Next, based on the operating length (L) of the aluminum profile and the installation method, use relevant formulas or tables to calculate the deflection. During the calculation process, it is important to consider the influence of various factors, such as the stability of the support method. This calculation allows us to accurately determine deflection, providing an important basis for aluminum profile selection and structural design.
The purpose of this table is to assign a unique number to each specification.
B. Calculation Method: The following formulas for calculating deflection under different support methods are generally applicable:
Aluminum alloy profiles can be cut with considerable precision. We can cut any length within a range of 50 to 4000 mm, with a tolerance of ±0.5 mm or less. Of course, the specific cutting accuracy depends on the manufacturer's equipment. We recommend consulting your fabricator for more detailed information.
Aluminum profiles are typically priced by the meter, with lengths up to 6 meters, and can be cut individually. When cutting aluminum profiles, specialized blades should be used, as grinding wheels can create rough surfaces and cause aluminum to adhere to the grinding wheel.
Although black and silver are commonly used, custom colors are available upon request. However, custom colors may incur additional costs.
While aluminum extrusions are feasible for building a frame for a motion mechanism with a load of 200 kg and a starting acceleration of 2 m/s², it's important to note that the aluminum extrusions are connected by splicing, not welding or casting. For applications requiring higher rigidity, welded or cast components are recommended to ensure structural stability.
Also, linear guides can be mounted on aluminum extrusions, but the specific accuracy level depends on the required travel accuracy. In actual applications, the travel accuracy of linear guides should be carefully understood and selected accordingly.
As shown in the above drawings, the accuracy of aluminum extrusions is relatively low, significantly lower than that of linear guides. Therefore, aluminum extrusions may be considered for applications with less stringent accuracy requirements, low loads, moderate speeds, and smooth motion requirements. However, it's important to note that even with the addition of positioning or limit stops, the improved stability and ease of assembly are only relative. Long-term operation may still result in uncontrollable risks, fundamentally due to the inherent accuracy limitations of the aluminum extrusions.
If an aluminum extrusion is truly necessary as a base and precision is critical, fine-machining the mounting datum surface and adding inserts can meet the requirements. In addition, when only vertical loads are carried, aluminum support optical axis guide rails can also be considered as an alternative.
