In the cutting process of laser cutting machine, auxiliary gas is essential! Among them, oxygen and nitrogen are commonly used. Of course, the higher the purity of the gas, the better the cutting quality will be. The air assisted cutting of laser cutting machine is the lowest cost way. However, there is always water mist on the protective lens during the laser cutting process, resulting in poor cutting quality. Normally, there should be no foreign matter on the lens of the cutting head of laser cutting machine, let alone water mist, so what's going on? REDSAIL laser editor will introduce the role of auxiliary gas:
1. In order to blow away the residual slag and achieve the best cutting effect.
2. Protect the lens while blowing away the metal slag with gas to avoid the slag sticking to the lens and affecting the cutting quality.
3. It can effectively achieve the effect of smooth cutting surface, no burr and slag, which belongs to fine cutting.
4. It can react with materials and increase the cutting speed. For example, using oxygen can achieve the effect of combustion support.
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, because the air contains water and oil, if it is not treated, it will cause lens pollution, 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 solves this problem well. 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 therein into droplets, which are discharged out of the machine by the drainer through gas-liquid separation to dry the compressed air.