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The energy density of high quality cutting effect
by：Transon
2020-10-29
The energy density of high quality cutting effect.
Laser cutting machine cutting is one of the advantages of high energy density beam, generally up to 10 w/cm2.
And because the energy density is inversely proportional to the area, so the focal spot diameter as small as possible, in order to produce a narrow kerf width;
At the same time focus spot diameter and is directly proportional to the depth of focus of the lens.
The smaller the focusing lens focal depth, focal spot diameter.
But cutting has splash, easy to get too close to the workpiece lens damage, so generally high power CO2 laser cutting machine widely used in industrial application of '5 ~ 7.
5 '('
127~190mm)
The focal length.
The actual focal spot diameter in 0.
1 to 0.
Between 4 mm.
For high quality cutting, the effective depth of focus and is cut and lens diameter and related materials.
With 5 'of lens cutting carbon steel, for example, the focal length of focal deeply + 2% range, namely around 5 mm.
So control focal point relative to the cut material on the surface of the position is very important.
Concern to the cutting quality and cutting speed, in principle, 6 mm of metal materials, focus on the surface;
6 mm carbon steel, focus on the surface;
6 mm stainless steel, the focus under the surface.
And the specific size can be determine by experiment.
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