20.500.12556/RUL-173212 Vpliv tehnoloških parametrov na kakovost obdelave masivnega lesa Influence of technological parameters on the quality of solid wood processing V diplomskem delu je obravnavan vpliv tehnoloških parametrov na kakovost obdelane površine pri treh vrstah lesa: bukvi, hrastu in smreki. Osredotočili smo se na tri ključne parametre: ostrino rezila (rz), prsni kot rezila (γ) in podajalno hitrost. Za eksperimentalno delo smo uporabili metodo načrtovanja eksperimentov (DOE) ter analizirali 120 vzorcev v prečni in vzdolžni smeri rezanja. Površinsko hrapavost smo ovrednotili z optičnim mikroskopom Olympus LEXT OL5000 z merilnima parametroma Sa in Sz. Rezultati kažejo, da ima najbolj izrazit vpliv na hrapavost kombinacija podajalne hitrosti in ostrine rezila. Najnižje vrednosti Sa (pod 5 µm) smo dosegli pri nizki hitrosti (2 m/min), ostrini rezila rz < 10 µm in prsnem kotu γ med 10° in 13°. Nasprotno pa so največje vrednosti Sa (nad 40 µm) nastale pri največji hitrosti (6 m/min), topem rezilu in prsnem kotu nad 20°. Ugotovili smo, da smer rezanja glede na potek vlaken pomembno vpliva na končno obdelavo, saj prečno rezanje povzroča večjo hrapavost. Na podlagi rezultatov smo oblikovali funkcionalne povezave med parametri, ki omogočajo nadaljnjo optimizacijo obdelovalnih procesov v lesnopredelovalni industriji. This bachelor’s thesis investigates the influence of technological parameters on the quality of the machined surface in three wood species: beech, oak, and spruce. The study focuses on three key parameters: tool sharpness (rz), rake angle (γ), and feed speed. A total of 120 samples were prepared and analysed in both transverse and longitudinal cutting directions. The experiment was designed using the Design of Experiments (DOE) method, while surface roughness was evaluated with an Olympus LEXT OL5000 laser microscope using the surface parameters Sa and Sz. The results indicate that the combination of feed speed and tool sharpness has the most significant effect on surface roughness. The lowest Sa values (below 5 µm) were achieved at a feed speed of 2 m/min, tool sharpness rz < 10 µm, and rake angle between 10° and 13°. In contrast, the highest Sa values (above 40 µm) occurred at 6 m/min feed speed, dull tools, and rake angles above 20°. The cutting direction relative to the wood grain also proved critical, as transverse cutting resulted in rougher surfaces. Based on the data, functional relationships between parameters were established, providing a foundation for further optimization of machining processes in the wood industry. tehnološki parametri površinska hrapavost rezanje lesa ostrina rezila prsni kot podajalna hitrost bukev hrast smreka analiza površine technological parameters surface roughness wood cutting tool sharpness rake angle feed speed beech oak spruce surface analysis true false false [M. Jozelj] Slovenski jezik Angleški jezik Diplomsko delo/naloga 2025-09-14 07:16:12 2025-09-14 07:16:17 2025-11-06 03:51:49 0000-00-00 00:00:00 2025 0 0 0000-00-00 NiDoloceno NiDoloceno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 630*822.1 264308 249012227 51763.pdf 51763.pdf 1 C78E518FD6078D673030EBD5C00F4E87 df9adaff10baba338fbcd56512606191b880832b85dca8954256231708dbff8c c66e6dce-9129-11f0-9328-0050569b8976 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=217385 Biotehniška fakulteta 0 0 0