The importance of laser cutting in the industry lies in obtaining the desired shapes quickly and with high-quality. It enables the processing of various materials, thicknesses, and complex shapes. The diploma thesis is focused on the optimization of fiber laser parameters for cutting stainless steel with thicknesses from 1,5 mm to 4 mm. When optimizing the technological parameters from the view of economy and quality of cut, the cutting speed and the position of the laser beam focus turned out to be the key parameters. The cutting quality was checked visually according to the surface coloration, the shape of the cutting marks and the presence of burrs, as well as the roughness of the cutting surfaces. The optimal conditions for the beginning and ending of the cutting, as well as the production of corners, were also determined. Furthermore, the production costs were determined on a sample product and the potential annual savings due to the optimization of the cutting process were estimated. We found that optimizing the parameters increases cutting speeds and improves cutting roughness. We compared the cutting of fastening brackets with a thickness of 4 mm using a fiber laser and a CO2 laser and achieved a time savings of 17,9 % in the production of 1250 pieces.
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