As a supplier of AS 1163 hollow sections, I've had extensive experience with these versatile products and the various bending methods applicable to them. AS 1163 is an Australian standard that specifies the requirements for structural steel hollow sections, which are widely used in construction, engineering, and other industries due to their excellent strength - to - weight ratio and aesthetic appeal. In this blog, I'll explore the different bending methods suitable for AS 1163 hollow sections.
1. Roll Bending
Roll bending is a popular method for bending AS 1163 hollow sections. This process involves passing the hollow section through a set of rolls. The rolls apply pressure to the section, gradually curving it into the desired shape. The main advantage of roll bending is its ability to produce long, smooth curves. It is particularly suitable for creating large - radius bends in circular, square, or rectangular hollow sections.
For instance, in architectural applications where curved handrails or structural arches are required, roll bending can achieve the necessary shapes with high precision. The process can be adjusted to control the radius of curvature, and the use of multiple rolls allows for complex geometries. However, roll bending has limitations when it comes to sharp bends. The minimum radius that can be achieved depends on the material properties of the AS 1163 hollow section, such as its thickness and yield strength.
2. Press Bending
Press bending is another common technique for bending AS 1163 hollow sections. In press bending, a hydraulic or mechanical press is used to apply a force to the section at a specific point, causing it to bend. This method is ideal for producing sharp bends or angles in the hollow sections.
For example, in the manufacturing of frames or brackets, press bending can create the required 90 - degree or other angular bends. The press bending process can be highly accurate, and the use of dies allows for consistent results. However, press bending may cause some distortion of the cross - section, especially in thinner - walled hollow sections. To minimize this distortion, proper die design and lubrication are essential.
3. Rotary Draw Bending
Rotary draw bending is a precise bending method that is well - suited for AS 1163 hollow sections. This process uses a rotating die and a clamping mechanism to bend the section around a fixed radius. The hollow section is clamped at one end, and as the die rotates, it pulls the section through the bending area, creating a smooth, accurate bend.
Rotary draw bending is commonly used in applications where high - quality bends with tight tolerances are required, such as in the automotive and aerospace industries. It can produce bends with a high degree of repeatability and can handle a wide range of radii. One of the key advantages of rotary draw bending is that it minimizes ovality and wall thinning in the bent section. However, the equipment for rotary draw bending can be expensive, and the setup time for each bend can be relatively long.
4. Induction Bending
Induction bending is a specialized method for bending AS 1163 hollow sections. This process uses an induction coil to heat a specific area of the section to a high temperature, making it more malleable. Once the section is heated, a bending force is applied to create the desired curve.
Induction bending is particularly useful for large - diameter or thick - walled hollow sections. It can produce bends with a large radius and is suitable for applications in the oil and gas industry, such as the bending of API 5L PSL2 GR.B Line Pipe. The advantage of induction bending is that it reduces the internal stresses in the bent section compared to cold - bending methods. However, the equipment for induction bending is complex and requires skilled operators.
5. Cold Bending vs. Hot Bending
When considering bending methods for AS 1163 hollow sections, it's important to understand the difference between cold bending and hot bending. Cold bending, which includes roll bending, press bending, and rotary draw bending, is performed at room temperature. Cold bending is generally more cost - effective and can be used for thinner - walled sections. It also maintains the material's original properties to a large extent.
On the other hand, hot bending, such as induction bending, involves heating the section to a high temperature before bending. Hot bending is suitable for thicker - walled sections and can achieve larger radii with less stress on the material. However, it requires additional equipment for heating and may change the material's properties, such as its hardness and microstructure.
6. Factors Affecting Bending
Several factors need to be considered when choosing a bending method for AS 1163 hollow sections. Material properties, such as the yield strength, ultimate tensile strength, and ductility, play a crucial role. Sections with higher yield strength may require more force to bend, and the ductility of the material affects the ability to form sharp bends without cracking.
The wall thickness of the hollow section is also important. Thinner - walled sections are more prone to distortion during bending, and different bending methods may be more suitable depending on the thickness. The cross - sectional shape of the hollow section, whether it is circular, square, or rectangular, can also influence the bending process. For example, circular sections may be easier to bend in some methods, while square or rectangular sections may require special dies or techniques to prevent flattening or corner cracking.
7. Applications and Compatibility
AS 1163 hollow sections are used in a wide range of applications, and the choice of bending method depends on the specific requirements of each application. In construction, roll bending and press bending are commonly used for creating structural elements such as columns and beams. In the manufacturing of machinery, rotary draw bending may be preferred for its precision.
When it comes to compatibility with other standards, it's interesting to note that there are similarities and differences between AS 1163 and other international standards. For example, EN 10210 S460NLH HOLLOW SECTION is a European standard for hollow sections. While the basic bending principles are similar, there may be differences in material properties and tolerances that need to be considered. Similarly, Hot Formed Hollow Section has its own characteristics, and the bending methods may need to be adjusted accordingly.
Conclusion
In conclusion, there are several bending methods applicable to AS 1163 hollow sections, each with its own advantages and limitations. Roll bending is great for long, smooth curves, press bending is suitable for sharp angles, rotary draw bending offers high precision, and induction bending is ideal for large - diameter or thick - walled sections. The choice of bending method depends on factors such as the material properties, wall thickness, cross - sectional shape, and the specific application requirements.
As a supplier of AS 1163 hollow sections, I am well - versed in these bending methods and can provide guidance on the best approach for your project. Whether you need simple bends for a small - scale construction project or complex geometries for a high - tech application, we can offer the right solutions. If you are interested in purchasing AS 1163 hollow sections or need more information about bending methods, please feel free to contact us for procurement discussions.
References
- Australian Standard AS 1163: Structural steel hollow sections
- Various industry publications on metal bending techniques
- Manufacturer's guidelines for AS 1163 hollow sections
