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Gas for laser cutting machine for cutting the what kind of impact
by：Transon
2020-10-30
Laser cutting machine cutting without the help of auxiliary gas, so gas has a great influence on the laser cutting machine cutting processing is also.
So what gas to the cutting effect?
Let's take a look at together.
we know that without the help of auxiliary gas laser cutting machine work. Auxiliary gas must have enough pressure to be able to completely clear the cutting waste residue, general when cutting thick workpiece pressure to reduce a little, stick to the workpiece on the residue will damage the cutting edge. On the contrary, too much air flow causes a reaction.
gas pressure can increase cutting speed ahead of time, but after reaching a big value, continue to increase the gas pressure will cause the cutting speed. With aid of the high gas pressure, the reason of lower cutting speed in addition to boil down to the high air velocity on and hang a district enhanced cooling effect, also may be intermittent shock waves that exist in the air of district cooling the action of the laser interference. Exists in the airflow uneven pressure and temperature, can cause the change of airflow field density.
the density gradient leading to internal refractive index change, to dry properly focused beam energy, to focus or beam divergence. This kind of interference may affect the melting efficiency, sometimes may change the model structure, led to the decrease of the quality of the cutting, if the beam divergence too hard. Make the light is too large, and even can't effectively cut the serious consequences.
in order to avoid the high-speed airflow on the cutting performance of adverse reactions, can imagine change the distribution of total pressure in the air, because the air pressure distribution of the change, make the melting process occurred in the center of low pressure area; While the surrounding adjacent high can raise enough momentum ( Momentum) To ensure more effectively remove slag. Due to the intermittent high speed of light will not cause interference, melting efficiency is also improved.
we know that without the help of auxiliary gas laser cutting machine work. Auxiliary gas must have enough pressure to be able to completely clear the cutting waste residue, general when cutting thick workpiece pressure to reduce a little, stick to the workpiece on the residue will damage the cutting edge. On the contrary, too much air flow causes a reaction.
gas pressure can increase cutting speed ahead of time, but after reaching a big value, continue to increase the gas pressure will cause the cutting speed. With aid of the high gas pressure, the reason of lower cutting speed in addition to boil down to the high air velocity on and hang a district enhanced cooling effect, also may be intermittent shock waves that exist in the air of district cooling the action of the laser interference. Exists in the airflow uneven pressure and temperature, can cause the change of airflow field density.
the density gradient leading to internal refractive index change, to dry properly focused beam energy, to focus or beam divergence. This kind of interference may affect the melting efficiency, sometimes may change the model structure, led to the decrease of the quality of the cutting, if the beam divergence too hard. Make the light is too large, and even can't effectively cut the serious consequences.
in order to avoid the high-speed airflow on the cutting performance of adverse reactions, can imagine change the distribution of total pressure in the air, because the air pressure distribution of the change, make the melting process occurred in the center of low pressure area; While the surrounding adjacent high can raise enough momentum ( Momentum) To ensure more effectively remove slag. Due to the intermittent high speed of light will not cause interference, melting efficiency is also improved.
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