LAWA - Production friendly solutions for laser welding of aluminium
Purpose and goal
The aim of the project has been to show how the risk of hot cracking in laser welding aluminum can be reduced with oscillating laser beam and with optimized welding parameters. A simulation model to predict the crack risk associated with setting of the welding parameters would be developed. Various welding tests would verify the correlation between welding parameters and the risk for hot cracks.
Expected results and effects
It has been shown that, especially with oscillating laser beam but also with optimized welding parameters, the risk of hot cracks can be affected. However, exactly how and why has not been clarified. The developed simulation model that was intended for this became too complex and requires too much computing power.
Planned approach and implementation
The project has been implemented in the form of work packages with the participation of Swerim, HV and industrial companies. The implementation has consisted of various packages such as developing a simulation model, developing and adapting crack tests to aluminum welding, standard welding tests with standard optics, welding tests with advanced laser welding optics, Design of Experiment, development of gas nozzles, etc. The work method has been successful, but especially the work on developing the simulation model has been underestimated.