Weld rolls
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Roll seam welding (Stitch welding)

ANDRITZ Soutec is a worldwide leader in seam welding of sequential spot welds for which the place of the spot welded electrodes is taken by the roller electrodes.

With roll seam welding, weld rolls assume the task of the electrode and the pressure tool.

A copper wire is guided between the rolls and the work piece while simultaneously providing a constant high quality weld seam. The copper wire allows for minimal wear to the weld rolls.  Welding spots are set closely by the rolls to allow for a continuous leak proof seam.  The pulse frequency of the current determines the spot weld spacing. For tack welding the spots are set further apart.

If a completely leak proof seam is required then the frequency is increased and a continuous seam is created.  Movement can take place during the welding process between the work pieces and the roll electrodes as a result from the rotating electrodes in roll seam welding.  This allows for the creation of a safe leak proof weld seam.

Deviations may occur when a work piece is moved and will not have a detrimental effect on the quality of the weld seam.  In order to keep abrasion and wear on the expensive weld rolls at a minimum to ensure a constant high quality weld seam, we exclusively use roller heads with wire intermediate electrodes in our welding applications.  

Weld rolls

Weld rolls

Our resistance welding machines:

RFA

Automated annular flange welding machine

Beer keg casing welder

Automated beer keg chasing welding machine

RQB

Automated brake shoe welder

Contour II

Fuel tank welder

Inner beer keg welder

Automated inner beer keg welding machine

VSTW-R spez. (Schako)

Ventilation inlet vane welder

SWA 400

The stitchwelder for high production runs

SWA 650

The stitchwelder for even higher production runs

VSTW 1000/1270/1524

The manual stitchwelder for longitudinal seams

VSTW-R

The manual stitchwelder for round pieces

VSTW-RBi-RBa

The manual stitchwelder for inside and outside pipe bends / elbows

VARB

The automatic half-shell welding machine

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