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Laser cutting process continue to cut what is the reason
Date:2015年08月03日 Access: Author:czw Source:http://www.laser8508.com
Laser cutting machine laser cutting process, assist gas pressure has a great effect on the results the cut. Auxiliary gas must be sufficient pressure to be able to completely clear the cut waste generation, usually when cutting thicker workpieces to reduce the pressure a bit, stick to the residue on the workpiece will destroy the cutting edge.
Increasing the gas pressure can cut speed ahead, but after reaching a maximum, it will continue to increase the gas pressure drop caused by the cutting speed. Auxiliary gas at high pressure, laser cutting machine speed reduction can be attributed to reasons besides high flow velocity and hung on a role in enhancing district cooling effect, but also may be present in the gas stream to the laser active region intermittent shock cooling interference. In the presence of uneven airflow pressure and temperature will cause the airflow field density. Such a density gradient refractive index changes leading to the venue, thus jamming beam energy focused, resulting in refocusing or beam divergence. Such interference can affect the melting efficiency may sometimes change the mode structure, resulting in cut quality decline, if the beam divergence too much. So that the spot is too large, or even cause can not effectively cut serious consequences.
When we use the fiber laser cutting machine, you want to cut the product and to the most accurate, then we must first understand what affects the cutting precision, here we have a simple introduction for everyone:
The laser beam emitted from tapered, so that the gap is tapered cut out, in this case, the thickness of 0.4MM stainless steel will be more than the smaller slit 3MM cut. Therefore, the shape of the laser beam depends affect metal laser cutting machine cutting precision of a major factor. Under the conditions of this tapered laser beam, the greater the thickness of the workpiece, accuracy will be lower, and therefore the larger the kerf.
Precision table, if the table precision injustice or other reasons will lead to high-precision laser cutting effect.
When the cone of the laser beam together, this time will be getting smaller and smaller, so that the laser-cut precision are becoming increasingly high, especially slits format will become smaller and smaller. At this time the smallest spot can reach 0.01mm. This is also one of the factors affecting the accuracy of laser cutting machine.
In this case, the cutting accuracy of different materials are also slightly different. Even with the same material, if the composition of different materials, there will be differences in the accuracy of cutting. Accordingly, the workpiece material also has some influence on laser cutting precision.
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