• The plant positions the spot-welding units and the sheets to be spot and edge welded. The spot-welding units are carried on compressed air driven slides for vertical travel and on motorized slides for cross-travel. The sheets are transferred by two pairs of motorized rollers that allow sheets of considerable length to be processed.

• An electronic device (PLC) controls the machine, governing via the programme the logical sequence of the processing cycle. The PLC is connected to a touch sensitive display terminal (Touch Screen), that allows the variable parameters for the single processes, times and positions for welding to be input and memorized in the resident programs.

• Two to four spot-welding units are provided each with a TIG generator, made up of a torch carriage, with a special patented sheet holder, for longitudinal, transverse and spot welds. Brushing units are fitted in line with the torch, and are used to clean the welds.

• Spot and transverse welding are carried out on a copper bar with cooling or gas shield.
  

• The longitudinal weld is effected on a copper roller.
  

• The welding devices and accessories are carried at the top of the machine, while the respective controls and electrical components will be installed in the electric panel.
  

• The electrical energy supply rating is approximately 40 KW, including the welding generators, supplied at 380 Volt, 3 phase, 50 Hz, plus neutral and ground.

DOUBLE WALL/ PLATE HEAT EXCHANGERS

The double wall heat exchanger is essentially made up of two steel sheets welded together, forming a space where the cooling or heating fluid can circulate through channels formed by inflation after welding.
The differing sheet thicknesses, their distance and the geometry of the spot welds allow the creation of passages of any section.