Laser cutting

The basic principle of laser cutting is to focus the laser on the material for local heating until it exceeds the melting point material, and then use coaxial high-pressure gas or the generated metal vapor pressure to move the molten metal. As the laser moves linearly relative to the material, then form a very narrow slit.

The types of sheet metal laser cutting:

1. Flame cutting

Flame cutting is a standard process used when cutting mild steel, it uses oxygen as the cutting gas. Pressuring the oxygen up to 6 bar and blow it into the incision, then the heated metal reacts with oxygen and starts combustion and oxidation. The chemical reaction releases large energy to assist the laser cutting that is the flame cutting.

2. Fusion cutting

Fusion cutting is another standard process of cutting metal. It also can be used to cut other fusible materials such as ceramics. It uses nitrogen or argon as the cutting gas, and the gas with a pressure of 2-20 bar blows through the incision. Argon and nitrogen are inert gases, which means they do not react with the molten metal, just blowing the extra material. At the same time, the inert gas can protect the cutting edge from being oxidized by air.

Metal plate processing

3. Vaporization cutting

During the laser vaporization cutting process, a high-energy-density laser is used to heat the material, causing the temperature to reach the boiling point of the material rapidly, and the material begins to form steam. These vapors are ejected at a very high speed and form an incision. The vaporization heat of the material is generally very large, so vaporization cutting requires large power and power density. Vaporization cutting is always used to cut thin metal materials and non-metal materials such as paper, cloth, wood, plastic film, plastic rubber, etc.

laser cutting

The advantages of sheet metal laser cutting:

1. Laser cutting with high flexibility, fast speed, high production efficiency, and short production cycle. Whether it is simple or complex parts, laser cutting can be used to achieve rapid forming and cutting at one time.
2. Narrow cutting slit, good cutting quality, high degree of automation, easy operation and low labor intensity
3. Automatic cutting and nesting can be realized, which improves material utilization, no tool wear, and good material adaptability.
4. It is easy to operate, reduces labor intensity for workers. And with low production costs to get good economic benefits.
5. There is no pollution during the processing and no harm to the human body.

The Applications of sheet metal laser cutting

Sheet metal laser cutting is an important application technology in the laser processing industry, accounting for more than 70% of the entire laser processing industry. Sheet metal laser cutting is currently the most advanced cutting process in the world. Because it has the advantages of precision manufacturing, flexible cutting, special-shaped processing, one-time forming, fast speed, and high efficiency, it has solved many problems that cannot be solved by conventional methods in industrial production.

A. Aerospace industry

Sheet metal laser cutting can produce complex and lightweight components for the aerospace industry because of its characteristics of accuracy and flexibility.

Metal plate processing

B. Auto industry

Sheet metal laser cutting is widely used in the automotive industry to produce a lot of components such as body panels, engine parts interior parts, etc.

C. Electronics and Semiconductors industry

The precision of sheet metal laser cutting can finish small and complex parts that can’t produced by traditional manufacturing methods. laser cutting can produce complex components such as circuit boards and electronic devices for the electronics and semiconductors industry.

D. Medical devices and equipment

Laser cutting plays an important role in the medical device and equipment industry because it is capable of finishing complex shapes parts such as surgical instruments, implants, and diagnostic equipment.

Several metals suitable for sheet metal laser cutting:

  1. Carbon steel

Because carbon steel contains carbon, carbon does not reflect light strongly and absorbs light well, so the metal materials in carbon steel are suitable for laser cutting machine processing, so carbon steel laser cutting machines are unshakable in carbon steel laser cutting processing.

Carbon steel is increasingly used. Modern laser-cutting machines can cut carbon steel plates up to 2 mm thick. The oxidation-melting cutting mechanism of the carbon steel cutting seam can be controlled within a satisfactory width range, and the thin plate cutting seam can be reduced to about 0.1 mm.

  1. Stainless steel

When laser cutting stainless steel, the stainless steel is melted and evaporated by the heat released when the laser beam irradiates the surface of the steel plate. The important process parameters that affect the quality of stainless steel mainly include cutting speed, laser power, air pressure, etc.

  1. Aluminum and aluminum alloys

Although laser cutting processing can be used for both metallic and non-metallic materials. However, some materials, such as copper, aluminum, and aluminum alloys are difficult to process by laser cutting due to their characteristics.

Plastics are also common materials that laser cutters can cut, and they have many industrial applications. They are suitable materials for signage, jewelry, and walls. Examples of plastic materials used for laser cutting are acrylic, PMMA, POM, PE, PP, etc.

The CNC sheet metal cutting service at DMTC

CNC sheet metal cutting is an important process that we utilize for rapid prototyping and custom production quality cutting processes at DMTC.

In DMTC, our team including sales, designers, and engineers are experienced problem solvers. We work closely with our customers to provide the best solution for each project. We ensure you can get the best sheet metal cutting service at DMTC.

At DMTC, we support many kinds of materials, such as carbon steel, stainless steel, aluminum, etc. Our CNC sheet metal cutting process is also very precise and can machine different thicknesses at the same time.

If you are looking for a supplier who can provide sheet metal cutting service, please contact us!

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