EoW November 2008

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.

The MARTA system from GEM ▲ ▲

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 : info@gemwelding.com Website : www.gemwelding.com

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

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 4 th quarter of 2008 and the one at Durban in the 1 st 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 : tenovahypertherm@hyperthermgroup.com Website : www.tenovagroup.com

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EuroWire – November 2008