2 reasons for the failure of the nozzle of the laser cutting machine

Two major reasons for the failure of laser cutting machine nozzles

First of all, we know that the nozzles of fiber laser cutting machines are generally divided into single and double layers, with different nozzle diameters and inverted cone holes. These features can not only ensure that the nozzle dissipates heat, but also is not easy to get slag; however, due to some improper operation factors, the laser nozzle will be blocked or damaged, which will lead to poor cutting accuracy of the laser cutting head, thus affecting the service life of the laser cutting machine. . The editor focuses on analyzing the main reasons for the failure of laser nozzles.

1. The nozzle "accumulates chips" and the hole diameter becomes larger

The single-layer laser nozzle is easily scratched and deformed due to its soft material. And in the process of mechanical operation, the nozzle will directly contact the slag, so if the melting point of the sheet to be cut is located in the inner circumference of the aperture, the phenomenon of "debris accumulation" will easily occur, resulting in the deviation of the direction of the laser beam and the weakening of the energy, which will eventually lead to The cutting accuracy decreases, which affects the cutting quality. When the accumulated chips reach a certain level, they will be washed away by the high-pressure airflow under high temperature conditions, resulting in a larger diameter.

2. The nozzle is deformed, and the slag particles damage the internal lens

During the cutting process, there are two situations: when the laser cutting head is collided in the vertical direction, the mechanical sensing protection mechanism will stop the machine from running. Then the collision from the horizontal direction can be thought of as a collision with the laser cutting head due to the lifting of the material to be cut. When the laser cutting head is under heavy force, although the sensing protection mechanism can stop the mechanical operation in time, at the same time, due to the force of the laser head, the laser head is inclined, the laser beam is deviated, and the nozzle directly contacts the material, resulting in the deformation of the nozzle, which cannot be Continue to cut; when the force of the laser head is light, the sensing protection mechanism cannot shut down the machine in time, causing the nozzle to enter the slag, and the high-pressure airflow will blow the slag into the laser head and cause losses.