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2017-09-26
HANS GS fiber laser cutting machine working pressure stability is essential
The use of HANS GS laser cutting machine, a good cutting effect can not be separated from a variety of gas auxiliary, in addition to the purity of auxiliary gas requirements, the cutting process for the pressure also has a high demand.
In the laser cutting process, auxiliary gas must have enough pressure to cut waste completely cleared, usually in cutting a little thick when the pressure decreases to a point, will stick to the residue on the workpiece cutting edge damage.
Increasing the gas pressure can accelerate the cutting speed, but reaching a maximum value and continuing to increase the gas pressure will lead to a decrease in the cutting speed. In the auxiliary gas pressure under high cutting speed, the reason for the decrease of removal can be attributed to the enhancement of the high flow speed and a zone of the cooling effect, but also may be interference in the presence of intermittent shock wave on the air cooling area of laser action. There is uneven pressure and temperature in the air flow, which will cause the change of the density of the airflow field. Such a density gradient leads to a change in the refractive index of the field, thereby focusing the energy of the dry beam, causing refocusing or beam divergence. This interference will affect the melting efficiency, may sometimes change the mode structure, resulting in the decline in the quality of cutting, if the beam divergence is too much. To make the spot too large, and even cause serious consequences can not be effectively cut.
Laser cutting machine universal speed even inventors are not foresee so fast it, with all these years of rapid development, upgrading of industry, the processing required to enhance the operation in the cutting process is also more and more detailed requirements.