Two major reasons for laser nozzle failure when using fiber laser cutting machine-lisa

Fiber laser cutting machine

Let’s talk about the two major causes of nozzle failure. If you face the problem of nozzle failure during the cutting process, how to deal with it in time.

With the rapid development of social economy, fiber laser cutting machines rely on the advantages of “low energy consumption, no pollution, simple operation” become rapidly popular. However, improper operation factors might block or damage the laser nozzle , thereby causing the cutting precision of the laser cutting head, and affecting the service life of the cutting machine. This article focuses on the main causes of laser nozzle failure. Follow me please.

First of all, as we know there a single and double layers of laser nozzles. The nozzles range in diameter from 1.0 mm to 3.0 mm and with 5 taper holes. These features do not guarantee that the nozzle will dissipate heat and it is not easy to get slag. However, due to features in the nozzle itself and the performance of the cutting machine, it is easy for the nozzle to worn out.

 

1. The nozzle “chip”, the aperture becomes larger

 

Soft material is esay to deform the Single-layer laser nozzles by flaws. And in the process of mechanical operation, the nozzle will directly contact the slag, then if the melting point of the cut sheet is in the inner circumference of the aperture, the phenomenon of “chip accumulation” will easily occur, resulting in the deviation of the direction of the laser beam and the weakening of the energy, eventually leading to the low cutting accuracy, which affects the cutting quality. When the accumulated debris reaches a certain level, high pressure airflow under high temperature conditions will wash away, resulting in a larger diameter.

 

2. The deformed nozzle and the slag particles damage the inner lens of fiber laser cutting machine

 

In the cutting process, there are two cases: when the laser cutting head is in the vertical direction. The mechanical sensing protection mechanism will stop the machine. Then the collision from the horizontal direction can naturally 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 stressed. The sensor protection mechanism can stop the mechanical operation in time, but at the same time. For  the laser head is stressed, the laser head is tilted, the laser beam is deflected. And the nozzle directly contacts the material, causing the nozzle to deform. Continue cutting.

When the laser head is lightly stressed, the sensing protection mechanism can not 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 to cause loss.