Cooperation

Welding

HERN s.r.o. provides joining of materials using several welding methods, mainly:

  • MAG (metal active gas welding)
  • RSW (resistance welding)
  • Stud Weld – welding of fasteners

Other welding methods available upon request.

The company holds a certificate of quality in welding under EN ISO 3834-2 and is subject to ongoing customer audits ( CATERPILLAR 7SWE = 7 steps of welding excellence)

The most common welded material is construction steal (S235, S355,S420, but also S700 and HARDOX 450) in profiles and sheets.

The welded parts are 1 to 600kg heavy, with size up to 2000x2000x2000mm

The company carries out inspection of welded joints according to the internal specifications of the customer, but mainly according to  STN EN ISO 5817 grade C.

 The inspection is provided by certified personnel for non-destructive inspection:

  • VT2 (visual testing level 2)
  • MT2 (magnetic testing level 2)
  • UT2 (ultrasonic testing level 2)

Destructive inspection:

  • Macro analysis of the welded joint

The company offers the capacity of 50 sites for manual welding and 9 sites for robotic welding.

The manual welding sites are equipped with professional inverter based welding power sources FRONIUS and CLOOS and quality ESAB and LINDE filler metals. These sites are also equipped with handlers, pillar cranes and bridges with carrying capacity up to 10 tons. The positioning of the welded parts is realised via pantograph and orbital positioners with the weight capacity up to 2.5 tons. All welders attend regular practical, theoretical and security training and hold adequate certificates, such as: EN ISO 9606-1 or EN 1418.

The robotic welding is provided by the CLOOS company. We use state of the art, highly productive methods, such as contactless laser positioning, tandem welding, quick clamping system for welding jig replacement, …

Our custom tool room offering welding and inspection jigs provides a further advantage to the welding process.

HERN s.r.o. provides joining of materials using several welding methods, mainly:

  • MAG (metal active gas welding)
  • RSW (resistance welding)
  • Stud Weld – welding of fasteners

Other welding methods available upon request.