G.Weike Laser
Profession Laser Manufacturer more than 15 Years.
42
cutting quality:
1) Affect the cutting section, when the cutting gas spewing, cause uneven
gas, make the cutting section is prone to side has fused stains, on the
other side of the phenomenon of no, or parts of all round quality is
inconsistent, sometimes resulting in not normal cut.
2) Quality of impact Angle, the cutting Angle or the Angle of minor
artifacts, prone to partial melting phenomenon, cutting plate, may not
be able to cut.
3) When impact perforation, perforation is not stable, time is not easy to
control, penetrates the cause of the thick plate is so fusion, and
penetrates the condition is not easy to master, less influence on the
perforated plate.
To sum up, the center of the nozzle and the concentricity of the laser is one of
the important factors that cause cutting quality, especially when cutting the
workpiece is thicker; its influence is even greater. So we must adjust the nozzle
center and laser concentricity, in order to obtain better cutting section.
Note
: Nozzle deformation or the nozzle melt stains, its influence on cutting
quality such as described above, therefore, the nozzle should be carefully placed,
may not be so as not to cause deformation that touch an injury; The nozzle with
some melting stains should be clear in time. The quality of the nozzle is of high
accuracy requirements in the manufacture, installation method is correct. If due
to the poor quality of the nozzle to change the terms, cutting the nozzle should
be timely replacement.
b)
Selection of nozzle pore diameter
Form 5-1
Nozzle diameter has φ1.5mm,φ2.0mm,φ2.5mm, φ3.0mm,etc.
Three-dimensional cutting sheet, commonly used φ1.2mm, φ1.5mm,The
difference are:
1)Under 2mm plate use φ1.2mm, cut surface is fine; use φ1.5mm, cut surface
coarser.
2) More than 2 mm thick plate: because of the high cutting power,cooling time is
relatively long, relatively cutting time also increases. Use φ1.2mm.
Gas diffusion area is small, so is not so stable when used. With φ1.5mm,
large gas diffusion area, gas flow velocity is slow, so the cutting isstable.
To sum up, the size of the nozzle aperture has serious effect on cutting
quality, perforation quality, at present, a lot of 3d laser cutting use from φ1.2mm
,
φ1.5mm diameter of nozzle.
Nozzle aperture, the greater, relative protection for the lens is poor,
because when cutting sparks of melt, play up the risk is very big, makes
the life of the lens is shorter.
5.6.2 Adjusting laser beam focus
