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Views: 38 Author: Site Editor Publish Time: 09-16-2021 Origin: Site
As we all know, when the laser cutting machine cuts metal materials, a part of the plasma cloud generated will affect the metal cutting effect, reduce the cutting speed and cutting accuracy. This situation is very common, so how should we solve this problem? Below, Leapion Laser will share with you a few points on how to reduce the adverse effects of plasma cloud on the cutting effect.
1. Take pulse cutting. The pulsed cutting method can ensure the peak power of the laser on the one hand, on the other hand, it can shorten the irradiation time of the laser on the metal material and reduce the generation of plasma clouds.
2. Appropriately reduce the laser cutting power. Without changing other conditions, reducing the cutting power can reduce the average power density at the focal point and reduce the generation of plasma clouds.
3. Appropriately widen the cutting gap. Widening the cutting slit not only provides a wider channel for the plasma cloud to disperse downwards, reduces the impact of the plasma cloud on cutting, but also helps to accelerate the discharge of slag in the slit and enhance the cutting effect.
4. Appropriately shorten the cutting height. The cutting height not only directly determines the thickness of the plasma cloud between the nozzle and the surface of the metal material (the shorter the distance, the thinner the plasma cloud), but the closer to the cutting nozzle, the higher the cutting gas pressure from the center of the nozzle, and the cutting pressure The elevation helps to accelerate the dispersal of the plasma cloud under the nozzle and reduce the shielding of the plasma cloud to the incident laser. Therefore, under the premise of ensuring the safety of the cutting head, the closer the follow-up distance is, the better.
5. Use a suitable cutting nozzle. A suitable nozzle can speed up the gas flow rate without increasing the nozzle diameter and accelerate the dispersion of the metal plasma cloud.
6. Add side blowing device and nozzle cooling device on the cutting head. The side blowing device is used to blow away part of the plasma cloud and reduce the accumulation of the plasma cloud under the nozzle. The nozzle cooling device can reduce the thermal impact of the plasma cloud on the nozzle and avoid affecting the capacitance performance parameters of the nozzle.
7. Adopt high sampling rate capacitive height adjuster. The high sampling rate capacitive height controller can not only ensure the follow-up accuracy, but also can judge the change of the plasma cloud under the nozzle by monitoring the change of the capacitance value. The machine tool can take measures such as deceleration, pause, pulse cutting, etc. by monitoring the change of the plasma cloud. To reduce the impact of plasma cloud on cutting.
For more professional questions about laser cutting machines, please contact Leapion Laser.
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