Impact of Gas Pressure on Laser Cutting Surface Quality

Laser cutting technology is widely used in various fields due to its advantages such as high precision and high efficiency. However, do you know that the size of the gas pressure during laser cutting has a crucial impact on the cutting section?

Laser cutting uses the high energy of the laser to instantly vaporize the metal, and uses auxiliary gas to blow away the slag on the surface of the workpiece to complete the cutting. The cutting gas not only helps to dissipate heat and assist combustion, but also blows away the molten stains to make the cutting section smooth. However, when the gas pressure changes, the cutting section will also present different states.

When the pressure of the cutting gas is too low, the slag in the cutting process cannot be effectively blown away, resulting in some molten stains remaining at the bottom of the workpiece. After cooling, these residual molten stains will form burrs, affecting the smoothness of the cutting surface and reducing the cutting quality. In addition, too low gas pressure may also make it difficult for the laser beam to penetrate the material, increase the perforation time, and thus reduce production efficiency and cutting speed. In the long run, this will not only affect the cutting accuracy, but also cause molten spots on the surface of the workpiece, further exacerbating the cutting quality problem.

On the other hand, when the pressure of the cutting gas is too high, the cutting section may appear rough and the cutting seam width increases. Excessive gas pressure will cause excessive blowing in the cutting area, causing partial melting of the cutting surface, thereby affecting the flatness of the cutting surface and making it difficult to form an ideal cutting section. Especially at the penetration point, excessive gas pressure will aggravate melting, resulting in a larger melting point, further affecting the cutting quality.

In the actual laser cutting process, the control of gas pressure must be precisely adjusted according to the type, thickness and cutting requirements of the material. Different materials have different requirements for gas pressure. For example, when cutting ordinary carbon steel, the required cutting gas pressure decreases relatively as the material thickness increases; while for stainless steel materials, the cutting gas pressure should increase accordingly as the material thickness increases. By reasonably adjusting the gas pressure, residual molten stains or excessive melting during the cutting process can be effectively avoided, thereby ensuring that the cutting surface is smooth and fine and meets production standards.

With its precise gas pressure adjustment technology, Huawei Laser Sheet Metal Laser Cutting Machine can automatically optimize the gas pressure according to the needs of different materials to ensure high efficiency and precision during the cutting process.