Laser cutting machine is the laser emitted from the laser, through the optical circuit system, focused into a high power density laser beam. The laser beam irradiates the surface of the workpiece, causing the workpiece to reach its melting or boiling point, while a high-pressure gas coaxial with the beam blows away the molten or vaporized metal.
As the beam moves relative to the workpiece, it eventually creates a slit in the material, which results in a cut. One of the advantages of laser cutting is the high energy density of the beam, generally 10W/cm2.
Since the energy density is inversely proportional to the area, the focal spot diameter is as small as possible in order to produce a narrow slit; at the same time, the focal spot diameter is also proportional to the focal depth of the lens. The smaller the focal depth of the focusing lens, the smaller the focal spot diameter.
Expanded:
Laser cutting process is an invisible beam of light instead of the traditional mechanical knife, with high precision, fast cutting, not limited to the cutting pattern limitations, automatic nesting to save materials, smooth cuts, low processing costs and other characteristics, will gradually improve or replace in the traditional metal cutting process equipment.
Cutting no mechanical stress, no shear burrs; high processing accuracy, good repeatability, no damage to the surface of the material; CNC programming, can be processed for any planogram, can be a large format of the whole plate cutting, without opening the mold, economic and time-saving.
Baidu Encyclopedia-Laser Cutting Machine