Numerical simulation of the thermal efficiency during laser deep penetration welding

A. Ganser, J. Pieper, S. Liebl, M. F. Zaeh

Research output: Contribution to journalConference articlepeer-review

6 Scopus citations

Abstract

The advantages of laser beam welding, such as its high flexibility, its high local energy input, and its fast processing speed, led to a substantial increase of industrial applications of the technology. High losses can be observed during laser welding of materials with a high thermal conductivity, such as aluminum or copper. This is caused by the heat conduction losses in the surrounding area of the process zone and due to reflections. These energy losses lead to a reduced efficiency of the laser welding process. A numerical model based on a CFD simulation is presented, which enables to calculate the molten pool isotherms. The thermal efficiency is determined for different keyhole geometries and welding velocities. This efficiency is defined as the ratio between the energy which is required to melt the volume of metal in the fusion zone and the absorbed laser beam power.

Original languageEnglish
Pages (from-to)1377-1386
Number of pages10
JournalPhysics Procedia
Volume83
DOIs
StatePublished - 2016
Event9th International Conference on Photonic Technologies, LANE 2016 - Furth, Germany
Duration: 19 Sep 201622 Sep 2016

Keywords

  • CFD simulation
  • copper
  • efficiency
  • laser welding

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