The laser cutting machine must have the help of auxiliary gas when processing! Generally, we use three kinds of auxiliary gases, namely oxygen, nitrogen and air. Of course, the higher the purity of the gas, the better the cutting quality. If conditions permit, air-assisted cutting of laser cutting machine is a low-cost way. However, water mist often appears on the protective lens during the use of air-assisted cutting, which is not only slow in cutting speed, but also poor in cutting quality. Why is there water mist on the protective lens of laser cutting machine?
First of all, let’s popularize the role of auxiliary gas:
1. In order to blow away the residual slag and achieve 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 without burr and slag, which is fine cutting.
4. It can react with the material and increase the cutting speed. For example, using oxygen can achieve the effect of combustion support.
Therefore, in order to achieve better cutting effect, the requirements for auxiliary gas are higher! Although air can be used as auxiliary gas, because the air contains water and oil, if not treated, it will cause lens pollution and unstable cutting head, so that the cutting effect and quality are not up to standard. Therefore, when using air cutting, it is necessary to equip the fiber laser cutting machine with a cold dryer, which can solve this problem. The cold dryer can forcibly cool the compressed air below the required dew point temperature, so as to condense a large amount of water vapor and oil mist contained in it into liquid droplets, which are discharged from the machine by the drainer through gas-liquid separation, so as to dry the compressed air.