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CNC plasma cutting is a very popular method for processing thick aluminum quickly and efficiently. This method provides high-precision cutting and repeatability through a computer-controlled system. Computerized torches and ionized gas are used to cut thick aluminum plates, producing accurate, complex shapes for manufacturers.
CNC plasma cutting products are used for structural components such as doors, window frames, and heavy-duty brackets. This process enables the efficient and reliable production of aluminum thick plate products at a higher speed, lower cost, and higher finished product quality.
Plasma Cutting Process Overview
CNC plasma cutting is one of the modern cutting processes that uses an electrically conductive gas, known as plasma, to melt and reduce the metal section, then cut it into the required sizes. In this process, the cutting torch moves as per the digital design that allows the precise, repeatable cutting of the aluminum plates. This process is also used on several types of conducting materials.
In this process, the very high electrical arc ionizes the gas, creating a very focused, high-temperature plasma jet. The created plasma jet reaches more than 20,000 °C, which is sufficient to quickly cut thick aluminum plates into the desired shapes and sizes. The computerized system controls cutting speed, torch height, and three-axis torch motion to maintain cutting quality on aluminum plates.
CNC plasma cutting is very suitable for thick aluminum plates because:
- It handles thicker materials than several laser cutting systems at a lower cost.
- It operates at a high cutting speed, which is ideal for production environments.
- Plas cutting works very well for the complex geometries, contours, and nested parts of the thick aluminum products.
CNC plasma cutting aluminum offers a strong combination of performance and affordability for thick plates, where productivity and flexibility are crucial.
Suitable Thickness Range for Aluminum
CNC plasma cutting works very well with medium to thick aluminum plates. However, the exact capacity of the CNC plasma cutter depends on the selected machine power, the thickness of the aluminum, and other specifications of the CNC plasma cutter.
Here, the thickness range of the aluminum plates is where the plasma cutter performs well during the cutting process:
- The cutter provides very efficient cutting in the range of 6 mm to 50 mm of the aluminum plates.
- The general production cutting goes up to 75 mm for heavy plates. Beyond that, very high-power machine systems are required for cutting thick aluminum plates.
- However, the other types of cutting process, such as laser or shear cutting, could provide more precise cutting for the aluminum plates with a thickness below 4 mm.
Various factors influence the thickness range of aluminum in the CNC plasma cutting process. Some of the major factors are given below:
- Power source of plasma: the system with high amperage can cut thicker aluminum plates. It also maintains the production speed of aluminum products.
- Gas type and Setup: The proper selection of the right gas mixture helps to improve the cut quality of the finished products. This setup also reduces dross on the aluminum surface.
- Control of Torch height: The height of the torch provides the length of the plasma arc, which is vital for thicker materials.
- Cutting speed: The cutting speed must be optimum to get a high quality of the cutting edges. Fast and very slow cutting speeds affect quality and also affect the heat zones.
In any industry that frequently processes aluminum plates, CNC plasma cutting is a very good choice for balancing material thickness and the finished product’s cut quality.
Edge Quality and Secondary Processing
CNC plasma cutting provides robust cutting for aluminum plates. This process provides very fine cutting profiles for simple to complex shapes. However, the edge quality of the products varies depending on the thickness, setting, and equipment used for the systems.
While cutting the thick aluminum plates, the manufacturer may notice the slight bevel on the cut edge of the product. The molten metal could be disposed of at the bottom of the cut. The heat-affected zones may be visible at the edges when cutting at a slower speed.
The high-quality final product from thick aluminum plates could be achieved by integrating secondary processing, such as deburring, grinding, polishing, and machining critical edges or surfaces. Here are some major secondary processes that provide high-quality edges:
- Deburring: This is the process that removes the sharp edges and small dross by using the abrasive belts.
- Grinding: This is one of the widely used surface finish methods, where the cut edges are smoothed for better appearance and a better fit on the equipment.
- Polishing: This is one of the methods that improves the surface finish or edges by polishing or coating the materials on the finished products. This provides good looks and low friction at the edges or surfaces where it is needed.
Despite the need for occasional secondary processing of plasma-cut surfaces, CNC plasma cutting remains highly efficient for aluminum plates because it drastically reduces rough-machining time. It also reduces material removal from the aluminum surface compared to conventional cutting processes.
Typical Industrial Use Cases
CNC plasma cutting of aluminum products is widely used across several industries, from aerospace, automotive, construction, and industrial equipment. Aluminum products are lightweight, strong, and corrosion-resistant, making CNC plasma-cutting products highly in demand worldwide. The application of CNC plasma-cut aluminum in the major sector, along with its uses, is listed in the following Table.
Industry sector | CNC plasma cutting of aluminum components | Common end-use applications |
Structural brackets, support plates, ground support equipment, and tooling fixtures | Aircraft structure assemblies, UAV frames, and maintenance tools | |
Chassis brackets, frames of buses, body panels, and ramps | Trucks, buses, and rail components | |
Stair stringers, facades, bridge components, structural gussets and frames, platforms, | Commercial buildings, industrial platforms, bridges, and architectural facades | |
Base plates, machine frames, enclosures, guards, covers | Manufacturing equipment, automation systems, production lines | |
Boat hull sections, structural supports, and ladders |
CNC plasma cutting systems are valuable for both custom and high-volume production in the above-mentioned sectors because they can quickly switch between jobs and geometries with very high accuracy and at optimal cost.
Conclusion: Benefits of CNC Plasma Cutting for Aluminum
CNC plasma cutting aluminum offers the powerful combination of speed, flexibility, and cost effectiveness for thick plate applications. It efficiently handles thick aluminum plates. It also enables the production of very complex geometries without any hurdles in the production workflow. Computerized systems handle the fabrication of thick plate components at high production rates.
In some cases, secondary edge finishing may be required to achieve a superior product finish. But in most cases, a CNC plasma system for thick plates is an excellent choice for fabricators across industries. The CNC plasma cutting process provides reliable performance and consistent component quality for the aerospace, automotive, construction, and heavy equipment industries.
This also provides a quick-change option when procuring large numbers of components, as well as the ability to accept design variations for thick aluminum products. Overall, this cutting process for thick aluminum plates is the most efficient, practical, and cost-effective compared to conventional processes.
Trust Conglin Aluminum for high-performance CNC plasma cutting tailored to your industrial needs.
