What are the effects of auxiliary gas on the processing of laser cutting machines
We know that the laser cutting machine needs some auxiliary gas when processing products. But why do you need to use auxiliary gas? Could it be said that the laser cutting machine can not work alone? I believe that many companies have some doubts about this problem. Let's take a look together below. Generally speaking, the laser cutting machine needs the help of auxiliary gas when processing the workpiece. The auxiliary gas must have sufficient pressure to be able to completely remove the waste generated by cutting. Generally, the air pressure should be reduced a little when cutting thicker workpieces. The residues sticking to the workpiece will damage the cutting edge. On the contrary, too much air flow will cause reactions (especially metal cutting with oxygen as an auxiliary gas), which will cause waste no matter what. Increasing the gas pressure can advance the cutting speed, but after reaching a maximum value, continuing to increase the gas pressure will cause the cutting speed to drop. Under high auxiliary gas pressure, the reason for the decrease in cutting speed can be attributed to the high air velocity and the enhancement of the cooling effect of the action area, and it may also be the interference of the intermittent shock wave existing in the airflow on the cooling of the laser action area. The uneven pressure and temperature in the airflow will cause changes in the density of the airflow field. Such a density gradient results in a change in the refractive index in the field, thereby constricting the focus of the beam energy, causing refocusing or beam divergence. This interference will affect the melting efficiency, and sometimes may change the mode structure, resulting in a decrease in cutting quality, if the beam diverges too much. If the light spot is too large, it may even cause serious consequences of not being able to cut effectively. In order to avoid the adverse reaction of the high-speed airflow to the cutting performance, it is conceivable to change the total pressure distribution in the airflow. Due to this change in the airflow pressure distribution, the melting process occurs in the central low-pressure zone; and the adjacent high-pressure zone around it can be increased to Sufficient momentum (impulsive force) to ensure more effective removal of slag. Since the intermittent nature of the high-pressure zone will not interfere with the speed of light, the melting efficiency is also improved. Wuhan Gaoneng Laser Equipment Manufacturing Co., Ltd. is a high-tech enterprise integrating Ru0026D, production and sales of professional laser complete sets of equipment. Not only successfully developed laser equipment with advanced technology, but also used self-support import and export rights to promote products to more than 40 global markets including Hong Kong, South Korea, Vietnam, Malaysia, Thailand, Australia, the United States, Japan, Germany, the Netherlands, Jordan, etc. nation.