High Speed Laser Nozzle

The impact of high-speed laser nozzles in laser cutting machines is undoubtedly crucial, as improper use of nozzles can cause significant damage to the particle beam.

To prevent potential hazards caused by nozzles in sheet metal fabrication projects, it is necessary to train individuals in nozzle expertise. The nozzle of the fiber laser metal cutting machine is very dangerous. The nozzle is sized to only allow light to pass through it, and in order to prevent the particle beam from coming into direct contact with the nozzle, it is obviously necessary to reduce the nominal diameter of the nozzle. As light directionality becomes more and more difficult, reasonable integration to remove molten material within the cutting slit and improve laser cutting efficiency is imperative.

The hazards associated with the nozzle diameter in fiber laser cutting machines are affected by the output power of the laser and the working pressure of the auxiliary gas. Depending on the nozzle diameter, there is a designated value that produces higher laser cutting speeds. Regardless of whether CO2 or N2 is used as the auxiliary gas, the experimental results of laser cutting using hard steel and carbide tools with higher difficulty coefficients confirm that the nozzle diameter is similar to the above results.

The size of the nozzle orifice of the fiber laser cutting machine directly affects the working pressure distribution at the inlet and outlet of the nozzle. Scientific research data shows that 1.5 mm diameter nozzles have high efficiency. Additionally, size affects quality, specifically the size of the thermal hazard zone and the overall width of the laser cut. The thermal hazard zone becomes smaller as the nozzle diameter increases, which is crucial because the jet cooling rate in the laser cut area due to the welded joint directly affects the thermal hazard zone. Crossflow from the nozzle can cause the joint to be too wide, and very small nozzles can make directivity difficult, causing the beam to be cut by small nozzle holes.

The spacing between the relevant nozzle and the steel part in the fiber laser cutting machine also affects the fusion of the nozzle swirler and the steel part seam, which is a challenging issue in aerodynamic models. The discharge pattern of the cyclone as well as the nozzle and steel components are all critical independent variables. If the distance between the nozzle and the steel part is too close, it will cause the working pressure to increase significantly, which will affect the actual effect of the laser cutting machine brand raw material and may cause excessive damage.

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