The final thesis deals with the research of laser welding of aluminum alloys in the production of an airtight joint. The purpose of the thesis is to seperate the gluing process from the joining process and tu use laser welding technology, which in series production offers cheaper, shorter and repeatable joining of airtight joints. Based on our plan we were changing the power of the laser beam, the welding speed and the joining was done with a butt weld joint. Based on a preliminary analysis of the joints, we determined the optimal laser welding parameters based on the size of the weld and the propotion of porosity from macrosands. With these parameters, we made test samples and checked the visual appearance of the weld and the leak tightness of the joint on the testing device and by immersion in water. Based on the analysis of the results, we determined the process parameters of the laser casting alloy sheet in the overlaping joint, achiecing airtight joints.
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