Sheet metal laser cutting is a process that uses a high-powered laser beam to cut through sheet metal materials. The laser beam is directed onto the surface of the sheet metal, which causes the material to melt or vaporize. The laser follows a predetermined path, guided by computer software, to cut out the desired shapes or designs.

The laser cutting process offers several advantages over traditional cutting methods. Firstly, it allows for a high level of precision and accuracy, ensuring clean and sharp edges. It can cut intricate designs and complex shapes with ease, providing flexibility in design possibilities.

Additionally, laser cutting is a fast and efficient process. The laser beam can move at high speeds, resulting in quicker production times compared to other cutting methods. It also reduces the need for additional finishing processes, as the laser cutting process often leaves smooth and polished edges.

Moreover, laser cutting is a versatile method that can be used on a wide range of sheet metal materials, including stainless steel, aluminum, brass, and copper. The ability to cut various materials makes it suitable for different industries, such as automotive, aerospace, electronics, and more.

Overall, sheet metal laser cutting offers a reliable and precise method for producing high-quality parts and components. It provides efficient production times, versatility in design options, and the ability to work with a variety of materials.​​​​​​​

The laser cutting process involves the following steps:

1.Design and Programming: The first step is to create or receive a digital design file of the part or shape that needs to be cut. Computer-aided design (CAD) software is commonly used for this purpose. The design file contains all the necessary information such as dimensions, shapes, and cutting paths.

2.Material Preparation: The sheet metal material that will be cut is prepared by cleaning and positioning it on the laser cutting machine. The material should be securely clamped or fixed in place to prevent movement during the cutting process.

3.Cutting Process: Once the machine is set up, the cutting process begins. The laser beam is directed onto the surface of the sheet metal material, precisely following the paths defined in the design file. As the laser beam makes contact with the material, it heats and melts or vaporizes the material along the cutting path. The high energy of the laser beam allows for quick and precise cutting.

4.Breaking Out: After the laser has cut the desired shapes or parts, the sheet metal skeleton is removed, leaving the finished pieces. This process is known as "breaking out" and can be done manually or by using automated systems, depending on the complexity and size of the parts.

5.Finishing and Inspection: The cut parts may undergo additional finishing processes such as deburring or polishing to remove any sharp edges or imperfections. Quality control and inspection are carried out to ensure that the finished parts meet the required specifications and standards.

The laser cutting process offers a fast, precise, and efficient method for cutting various materials and creating intricate shapes and designs. It is widely used in industries such as manufacturing, automotive, aerospace, electronics, and more.​​​​​​​

The majority of the laser cutting we do here at CNCT Manufacturing is from sheet metal. We can laser cut:
> Mild steel up to 40mm
> Stainless Steel up to 30mm
> Aluminium up to 20mm in thickness
Plastics: Laser cutting is commonly used on plastics like acrylic, polycarbonate, ABS, PVC, and polypropylene.
It is important to note that not all materials are suitable for laser cutting due to their composition and reaction to the laser beam. Before proceeding with laser cutting, it is advisable to consult with a laser cutting service provider or manufacturer to ensure that the material can be safely and effectively cut using this method.

Advantages of laser cutting:

1.Precision: Laser cutting offers high precision and accuracy, allowing for intricate and complex cuts with tight tolerances. It can produce sharp edges and intricate details that may be challenging to achieve with other cutting methods.

2.Versatility: Laser cutting is suitable for a wide range of materials, including metals, plastics, wood, fabrics, and more. It can cut through various thicknesses and densities of materials.

3.Non-contact process: Laser cutting is a non-contact process, meaning that the laser beam does not physically touch the material being cut. This reduces the risk of material deformation, distortion, or damage that could occur with other cutting methods.

4.Minimal material wastage: The narrow laser beam results in a small cutting kerf, minimizing material wastage. Nesting software can optimize the placement of multiple parts on a sheet to maximize material utilization and reduce waste further.

5.Speed and efficiency: Laser cutting is a fast and efficient process, allowing for quick production times, especially for repetitive or high-volume cutting tasks. Automated systems can be used for continuous and uninterrupted cutting.​​​​​​​

Laser cutting works based on the principles of focused high-energy laser beams and their interaction with materials. Here is a step-by-step explanation of how laser cutting works:

1.Cutting process: Once the laser beam has completely penetrated the material at one point, the actual cutting process begins. The laser system, controlled by the CNC system, follows the selected cutting geometry and path. The controlled movement of the laser beam across the material cuts through it, creating the desired shape or pattern.

2.Kerf width: The laser cutting process produces a narrow cut, known as the kerf, which has a width that depends on the laser beam's characteristics, material thickness, and cutting speed. The kerf width is typically smaller than other conventional cutting methods.

3.Post-processing: After the cutting process is complete, the cut parts may undergo post-processing steps such as cleaning, deburring, or surface treatments to fulfill specific requirements or improve the finished product's quality.

It is important to note that different materials and thicknesses may require adjustments in laser power, cutting speed, and assist gas selection to achieve optimal cutting results. Laser cutting systems are highly programmable, allowing for precise control and customization of the cutting process.​​​​​​​