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 language | English |
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Pages (from-to) | 1377-1386 |
Number of pages | 10 |
Journal | Physics Procedia |
Volume | 83 |
DOIs | |
State | Published - 2016 |
Event | 9th International Conference on Photonic Technologies, LANE 2016 - Furth, Germany Duration: 19 Sep 2016 → 22 Sep 2016 |
Keywords
- CFD simulation
- copper
- efficiency
- laser welding