20.500.12556/RUL-186962 Vpliv diamantu podobne oglikove prevleke (DLC) na obstojnost vreznikov pri vrezovanju navojev v aluminijevo zlitino Effect of diamond-like carbon (DLC) coating on tap tool life in thread tapping of aluminium alloy Raziskava obravnava strojno vrezovanje navojev v aluminijevo zlitino Al 6082 z uporabo komercialno dostopnih vreznikov z DLC in konvencionalnimi prevlekami. Preizkušenih je bilo sedem vreznikov M10 × 1,5 pri mazanju z oblivanjem, minimalnem mazanju (MQL) in v suhih pogojih. Primerjava je temeljila na povprečnem momentu pri vrezovanju in izvleku, pri vreznikih Garant 13110 in Guhring 8082 pa je bila dodatno izmerjena linijska hrapavost boka navoja. Najnižji in najbolj stabilen moment je bil dosežen pri mazanju z oblivanjem. Pri MQL so bile vrednosti nekoliko višje, vendar je bila poraba maziva bistveno manjša. Suho vrezovanje se je izkazalo kot nezanesljivo, saj je večina orodij odpovedala zaradi adhezije aluminija in zamašitve z odrezki. Med DLC prevlečenimi orodji sta posebej dobre rezultate dosegla Garant 13110 in Guhring 8082. Meritve hrapavosti so pokazale, da se z zmanjševanjem količine maziva povečujeta R$_{a}$ in R$_{z}$, pri čemer je Guhring 8082 pri vseh pogojih dosegel nižje vrednosti kot Garant 13110. Rezultati kažejo, da je učinkovitost DLC prevleke odvisna tudi od namembnosti orodja in pogojev mazanja. The study investigates machine tapping of threads in aluminium alloy Al 6082 using commercially available taps with DLC and conventional coatings. Seven M10 × 1.5 taps were tested under flood lubrication, minimum quantity lubrication (MQL), and dry conditions. The comparison was based on average tapping and withdrawal torque, while thread-flank line roughness was additionally measured for the Garant 13110 and Guhring 8082 taps. Flood lubrication produced the lowest and most stable tapping torque. Under MQL, the torque values were slightly higher, but lubricant consumption was substantially lower. Dry tapping proved unreliable because most tools failed due to aluminium adhesion and chip clogging. Among the DLC coated tools, Garant 13110 and Guhring 8082 achieved particularly favourable results. Roughness measurements showed that R$_{a}$ and R$_{z}$ increased as the amount of lubricant decreased, while Guhring 8082 achieved lower roughness than Garant 13110 under all three lubrication conditions. The results indicate that the effectiveness of a DLC coating also depends on the intended tool application and lubrication conditions. vrezovanje navojev DLC prevleke aluminijeve zlitine Al 6082 moment pri vrezovanju minimalno mazanje (MQL) thread tapping DLC coatings aluminium alloy Al 6082 tapping torque minimum quantity lubrication (MQL) true false false [D. Pekica] Slovenski jezik Angleški jezik Diplomsko delo/naloga 2026-09-08 08:30:48 2026-09-08 08:30:54 2026-09-09 04:22:04 0000-00-00 00:00:00 2026 0 Ljubljana 0 XIII, 24 f. 0000-00-00 NiDoloceno NiDoloceno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 621.9.02:621.882.2:669.71(043.2) 289566 290348291 49175.pdf 49175.pdf 1 20728E419299838438DC5F53BC16E51E c1d4820e322550eb587895a5b46ce78a1a1d73b3d871f11f4c82638fc6967c3b d3bef7f8-ab4e-11f1-8bc5-0050569b8976 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=246369 Fakulteta za strojništvo 0 0 0