G.Weike Laser
Profession Laser Manufacturer more than 15 Years.
47
oxygen and the quality of the plate have serious influence on the
quality of the cutting. Laser oxygen cutting mainly uses in easy
oxidation of metal materials such as carbon steel, as well as
stainless steel, but the cutting section is black and coarse, and the
cost is lower than inert gas cutting.
5.7.1.2 The feature of laser cutting
Laser cutting compared with other methods of thermal cutting, the general
feature is faster speed and higher quality. Specific summarized as the following
several aspects:
8) Good cutting quality
Because of the small laser spot, high energy density, fast cutting speed,
the laser cutting can obtained the better gutting quality.
9) The slit of laser cutting is narrow, the surface of the slit parallel and has
a perfect vertical degree, The size of the cutting parts reach high
accuracy. Cutting surface is smooth and clan ,it even can be used as the
last procedure, without mechanical processing, parts can be used directly.
10) After laser cutting, the width of the heat affected zone is small, the
material performance around the kerf is hardly affected, and the work-piece
deformation is small, high cutting accuracy.
11) Fast cutting speed, e.g. The cutting speed of 2500w laser cutting 1mm
of thick cold rolled carbon steel plate can be up to 16-19m|min.
12) None-contact cutting , laser cutting nozzle and the work-piece out of
contact, avoiding the tool wear.
The comparison of laser cutting, water cutting and plasma cutting are in
the following table. The cutting material is 6mm mild steel carbon plate.
cutting
method
Kerf
width/mm
The width of
heat affected
zone/mm
The quality
of section
Cutting
speed
cost
Laser
cutting
0.2—0.3
0.04—0.06
Vertical
and clean
Very fast
high
Water
cutting
0.7—1.0
Wedge is
coarser
Very slow
low
5.7.2 The choice of laser cutting gas and pressure
Plasma
cutting
3.0—4.0
0.5—1.0
Wedge is
coarser
fast
Between
low and
high
