Utgangspunktet:
The Dražice portfolio includes over 380 types or modifications of hot water storage tanks and water heaters as well as various types of buffer tank. The basic structure of the tanks is always similar: A sheet is shaped into a pipe and the seam is welded. A base and lid are then added and also radially welded. It is important to have high-quality seams which will withstand the pressure in the heat accumulators later on.
Løsningen:
The base material for the heat accumulator is structural steel with a yield strength of 230 MPa; the diameters of the pipes range between 500 and 850 mm; the material thickness is between 2 and 3 mm. Each component requires individualised weld seams. With the wide range of welding machines and innovative welding processes, EWM machines always deliver optimal results. What’s more, the control of the welding machines can be easily integrated into Dražice’s plant controls, allowing automated or semi-automated production of the base bodies.
Resultatet:
Depending on the application, the Titan XQ 400 puls DW or the Picomig 355 puls is used for automated welding, as they provide the right welding parameters for any material, even aluminium. In manual welding, the Phoenix 405 Progress puls stands out with its wide range of applications, from MIG/MAG to electrode all the way to TIG welding. The drive 4X wire feeder feeds the filler metal safely to the weld spot. This results in almost spatter-free seams, high weld seam quality and minimal post weld work, because for Dražice, reliable weld seams mean high productivity and thus strong performance.
