161 / 164
159
M
ay
/J
une
2007
Flying cold saw Alda s 200 x 6 – 40 Kvatro
Parameters
Values
Units
Tube diameter max/min
200/138
mm
Square profile max
150 x 150
mm
Rectangle profile max
200 x 100
mm
Wall thickness max/min
6 ÷ 1.2
mm
Material
S 185; S 235 JRH;
S 235 JR; 1.4301;
1.4571
Mill speed max
50
m/min
Rotary saw diameter
4 x 250
mm
Number of cutting cycles for L= 6m
8
1/min
Life of rotary blade between
sharpening (est)
80 ÷ 100
t
Power input
180
kW
Comments: The concept of four saw arbors means, that during 65
per cent of the time it takes to make a cut, four rotary saw blades
are working together and there are eight contact places. This is the
reason why, for example a s/s tube Ø 200 x 2mm takes only 4.8
seconds to cut, which is about 1/10 of the time needed to make the
same cut using a belt saw. Aldas Kvatro was used successfully also
with s/s tubes.
Conclusions
This analysis clearly shows that in order to make the current and
new production mills the most effective, it is advantageous to install
a dividing machine able to switch between the flying saw method
and flying shear cutoff method, which is a combination machine.
The concept and its advantages become apparent in production lines
for tubes Ø 38-102mm and other derived square/rectangular profiles.
The use of a combination dividing machine, providing there is a
sufficient reserve capacity of HF welding generator, can increase mill
production by 25-30 per cent and return investment within a year.
As already mentioned, the production program of Attl a spol sro
includes entire tube mills. However, it is worth pointing out the
quality of Attl a spol’s CNC bundling machine for the full range of
tubes and profiles in lengths from 4-12m, installable as the final
module of a production mill.
Attl a spol sro have designed and installed a new type of vertical strip
accumulator in three production facilities. This is a good alternative
to the expensive and energy thirsty horizontal accumulator.
Attl a spol sro
– Czech Republic
Fax
: +420 271 960 414
:
attl@attl.cz•
Website
:
www.attl.cz›
Figure 7
:
A fish eye view of an Attl mill for tubes to 104x4mm