Why is there always water mist on the protective lens of the laser cutting machine?
When using the laser cutting machine, we often find that the protective lens of the laser cutting machine will be misty. What causes this?
In the cutting process of the laser cutting machine, auxiliary gas is indispensable! Among them, we often use oxygen and nitrogen. Of course, the higher the purity of the gas, the better the cutting quality will be. There are also many customers who want to save costs and use air cutting. However, there is always water mist on the protective lens during the cutting process, and the cutting quality is very poor. Why is this?
The role of auxiliary gas:
1. To blow away the residual waste slag and achieve a good cutting effect.
2. Use gas to blow away the metal slag while protecting the lens to prevent the slag from sticking to the lens and affecting the cutting quality.
3. It can effectively achieve the effect of smooth cutting surface, no burrs and no slag, which belongs to fine cutting.
4. It can react with the material to increase the cutting speed. For example, using oxygen can achieve the effect of combustion.
Therefore, in order to achieve a better cutting effect, the requirements for auxiliary gas are relatively high! Although air can be used as auxiliary gas, since air contains water and oil, if it is not treated, it will cause lens contamination, unstable cutting head, and substandard cutting effect and quality. Therefore, when using air cutting, the fiber laser cutting machine needs to be equipped with a cold dryer, which solves this problem well. The cold dryer can force the compressed air to cool below the required dew point temperature, thereby condensing the large amount of water vapor and oil mist contained in it into droplets, which are discharged from the machine through the gas-liquid separation and discharged from the machine by the drainer to dry the compressed air.
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