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Location：Laser cutting is a thermal cutting method that uses a focused high-power density laser to rapidly melt, vaporize, burn, or reach the ignition point of the material at the irradiated area. At the same time, the molten material is blown out by a high-speed airflow coaxial with the beam, and the laser spot irradiation position is moved by a CNC mechanical system to achieve cutting of the workpiece.
How to find the focus of a laser cutting machine?
Due to the significant impact of laser power density on cutting speed, the selection of focal position is particularly important. The size of the laser spot after focusing is directly proportional to the focal length of the lens. There are three simple methods to determine the cutting focus in the industrial field:
1. Printing method: Move the cutting head from top to bottom and perform laser beam printing on the plastic plate, with the smallest printing diameter as the focal point.
2. Oblique plate method: Use a plastic plate placed at an angle to the vertical axis to pull it horizontally and find the minimum point of the laser beam as the focus
3. Blue Spark Method: Remove the nozzle, blow air, and apply a pulsed laser onto the stainless steel plate, causing the cutting head to move from top to bottom until the maximum blue spark is the focal point.
Currently, many manufacturers' machines have achieved automatic focusing. With the automatic focusing function, the processing efficiency of laser cutting machines can be significantly improved: the perforation time of thick plates is greatly reduced; Processing workpieces of different materials and thicknesses, the machine can automatically adjust the focus quickly to the most suitable position,.
What are the types of lasers and what are their differences?
At present, the lasers used for laser processing and manufacturing mainly include CO2 lasers, YAG lasers, and fiber lasers. High power CO2 lasers and YAG lasers are widely used in confidential processing; Fiber lasers based on fiber substrates have significant advantages in reducing threshold, oscillation wavelength range, and wavelength tunability, and have become an emerging technology in the field of lasers.