BeKas

Rounding of cut edges with thermal cutting tools
Tags:

BeKas

Project

Federal Ministry of Economic Affairs and Energy

Fundings

Fraunhofer IFAM, Meyer Yards, ThyssenKrupp Marine Systems

Main partners

Dr. Andreas Momber

Contact

Rounding of cut edges with thermal cutting tools

Large vessels contain tens of kilometers of free edges, particularly in their tank sections. These edges must be manually beveled or rounded prior to the coating application. Modern ship building technology, however, includes thermal cutting tools, namely lasers or electron beams, for plate cutting. The innovative approach of the Bekas-Project is to apply these tools to the edge rounding as well by developing an integrated cutting-rounding process. 

The following results are achieved:

  • Geometrically well defined edges could be generated due to a remelting process during the thermal cutting processes.
  • A testing procedure was developed to investigate the performance of protective coatings over the edges under simulated ballast water tank conditions.
  • It was shown that the thermally rounded edges met the requirements defioned by the International Maritime Organization (IMO).

 

Free edges in a ballast water tank, coated by Muehlhan


Polished cross section area of a steel edge, cut with a laser machine and coated in Muehlhan’s laboratory

 

Specimens, coated in Muehlhan’s laboratory, in the specially
designed 
IMO testing chamber