Page 1 - Laserline-Case-Study-Repair-welding-at-a-height-of-25m

Repair Welding at a Height of 25 Meters

Task Result

MATEX PM, a company based in Plzen (Pilsen) in the The welding was carried out with a Ø 1.2 mm focus
Czech Republic, markets job-shop solutions for various without using any additional filler wire. The mobile diode
metal applications using diode lasers. In the reactor hall of laser enabled the gear wheels to be repaired in situ,
the Dukovany nuclear power plant a routine check avoiding the costly and complex effort of removing them.
detected cracks on a gear wheel in the gearbox of a A final material test of the repaired gear wheels to the
crane. As the crane was 25 meters up, and there was no nuclear power plant’s exact specification was successfully
easy way to remove the gear wheel, the customer looked passed.
for another – as simple as possible - solution to repair the
cracks.

Procedure

The repair called for a mobile laser capable of welding the
gear wheels in situ. The laser would have to be compact
and light in order to work on a narrow scaffold. The
Dukovany nuclear power plant contracted MATEX PM to
carry out the repair welding directly on-site using a diode
laser. The LDF 3000-60 mobile diode laser system Material: GS36Mn5
together with a control robot were positioned on a level Task: Weld gear wheels in situ
with the crane at a height of 25 meters in order to weld the Laser: LDF 3000-60
cracks in the gear wheels.
Optic: Focus Ø 1.2 mm
Parameters: 0.6 m/min – Repair welding using a diode laser
Result: Successful repair, the crane is operable again

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