EoW November 2008

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EuroWire – November 2008 40
english technology news
Marta modular system
MARTA system is GEM’s fully automated
two-axis welding machine, in sizes up
to 4,800 x 1,500mm.
The rigid machined frame ensures high
accuracy, absence of vibrations during
working and resistance to external
stresses. The modular design meets
individual requirements and improves
manufacturing flexibility for frequent
product changes.
The welding gun is of the C type,
with two opposed cylinders in the
standard version, fitted with electrode
bars in order to weld several crosses
at the same time. The machine can be
fitted with a rotary welding head to
follow irregular shapes, and a lower
NC axis for changing the electrode
height so that it is possible to weld
components with different working
levels.
The C gun can have more cylinders,
working individually or two by two.
The electrodes can be mounted at
90° or side by side, in order to speed up
the production.
A medium frequency inverter (1,000 Hz)
is available on request for high welding
quality.
The steel linear slides are of the
re-circulating ball type while a Siemens
brushless motor coupled with pinion
and precision rack provides the system
drive.
The machine is fitted with two
working stations, side by side. This
system increases the productivity of
each operator as the machine welds
while the operator unloads/reloads.
The constant current welding control
will store up to 63 different welding
programs.
The CNC is connected to an ergonomic
terminal, which is used to manually
operate the machine, especially for the
teach-in programming.
GEM Srl – Italy
Fax: +39 011 9241002
Email:
Website :
Hypertherm furnaces
for AZ coatings
Safal Group, a leading supplier of metal coated roofing in Africa,
has chosen Tenova Hypertherm as the furnace supplier for two
new strip processing lines to be set up in Tanzania and South
Africa.
The two furnaces, installed in Dar-es-Salam and KwaZulu-Natal
(Durban) plants respectively, are now in an advanced phase of
construction.
The Dar-es-Salam facility is expected to be commissioned in
the 4th quarter of 2008 and the one at Durban in the 1st quarter
of 2009; both furnaces will be used for the production of
aluminium-zinc (AZ) coated product
The horizontal non-ox based furnaces of Safal Group will be
equipped with cutting edge low temperature strip heating
technology developed by Tenova Hypertherm to reduce energy
consumption and is expected to result in substantial savings for
Safal Group.
The two contracts mark the entry of Tenova Hypertherm into
the coveted and as yet untapped market of AZ coatings.
Tenova Hypertherm – India
Fax: +91 22 2847 7703
Email:
Website:
The MARTA system from GEM ▲ ▲