Inventory of laser cutting machine principles and advantages

Laser cutting machine principle - introduction

Laser cutting machine technology uses the energy released when a laser beam hits the surface of a metal sheet. The metal sheet melts and the slag is blown away by the gas. Because the laser power is so concentrated, only a small amount of heat is transferred to other parts of the metal sheet, causing little or no deformation. Complex shapes can be cut very accurately with lasers, and the cut blanks do not require further processing.
The laser source generally uses a carbon dioxide laser beam with an operating power of 500-5000 watts. This power level is lower than the requirements of many household electric heaters. The laser beam is focused on a small area through lenses and reflectors. The high concentration of energy enables rapid local heating to melt the metal sheet.
Stainless steel below 16mm can be cut with laser cutting equipment, and stainless steel with a thickness of 8-10mm can be cut by adding oxygen to the laser beam, but oxygen cutting will form a thin oxide film on the cut surface. The maximum thickness of the cutting can be increased to 16mm, but the dimensional error of the cut parts is large.
As a high-tech laser technology, since its inception, it has been developing laser products suitable for various industries according to different social needs, such as laser printers, laser beauty machines, laser marking CNC laser cutting machines, laser cutting machines and other products. Due to the late start of the domestic laser industry, it lags behind some developed countries in technology research and development to a large extent. At present, the laser products produced by domestic laser product manufacturers, some key parts such as laser tubes, drive motors, galvanometers, focusing mirrors, etc. are still imported. This has caused the cost to rise and increased the burden on consumers.
Over the years, with the advancement of domestic laser technology, the research and development and production of complete machines and some parts have gradually moved closer to foreign advanced products. In some aspects, it is even better than foreign products, coupled with the advantages of JEG, it still occupies a dominant position in the domestic market. However, in terms of precision processing and equipment, stability and endurance, foreign advanced products still have an absolute advantage.
Principle of laser cutting machine - principle.
In laser cutting machines, the main work is laser tubes, so it is necessary for us to understand laser tubes.
Everyone knows the importance of laser tubes in laser equipment. Let's use the most common laser tubes to make judgments. Carbon dioxide laser tubes.
The composition of the laser tube is made of hard glass, so it is a fragile and brittle material. To understand the CO2 laser tube, you must first understand the structure of the laser tube. A CO2 laser like this uses a layered sleeve structure, and the innermost layer is the discharge tube. However, the diameter of the CO2 laser discharge tube is thicker than the laser tube itself. The thickness of the discharge tube is proportional to the diffraction reaction caused by the spot size, and the length of the discharge tube is also related to the output power of the discharge tube. The same ratio.
During the operation of the laser cutting machine, the laser tube will generate a lot of heat, which will affect the normal operation of the cutting machine. Therefore, a chiller in a special area is required to cool the laser tube to ensure that the laser cutting machine can work normally at a constant temperature. 200W lasers can use CW-6200 with a cooling capacity of 5.5 KW. 650W lasers use CW-7800, and the cooling capacity can reach 23KW.