20.500.12556/RUL-180939 Vpliv hrapavosti jeklenega pastorka na življenjsko dobo zobniškega para spolimernim zobnikom The Influence of steel Pinion surface roughness on the service life of a polymergear pair Namen zaključne naloge je bil ovrednotiti vpliv hrapavosti jeklenega pastorka (100Cr6) na življenjsko dobo polimernih zobnikov iz materiala POM. Preizkuse smo izvedli na namenskem preizkuševališču, izdelanem v laboratoriju TINT. Pri preizkusih smo sistematično spreminjali navor, hitrost vrtenja in temperaturo ter primerjali obrabo in življenjsko dobo pri polimernem zobniku v stiku z gladkim in hrapavim pastorkom. Rezultati so pokazali, da polimerni zobnik z gladkim pastorkom pri nižjih obremenitvah doseže štirikrat daljšo življenjsko dobo kot pa hrapavim pastorkom, saj je zaradi gladke površine obraba zelo majhna. Pri hrapavem pastorku pa je zaradi visokih parametrov hrapavosti abrazijska obraba veliko izrazitejša. Z večanjem obremenitev se zaradi toplotne degradacije hitreje ruši material. Posledično se razlika v življenjski dobi med zobnikoma zmanjšuje, saj začnejo prevladovati termo-mehanski vplivi, zato se vpliv hrapavosti površine zmanjša. Raziskava potrjuje, da je kakovost površine pastorka ključnega pomena predvsem pri nižjih obremenitvah, kjer lahko bistveno vpliva na zanesljivost in trajnost polimernih zobnikov. The purpose of the final thesis was to evaluate the influence of the surface roughness of a steel pinion (100Cr6) on the service life of polymer gears made of POM. The experiments were conducted on a dedicated test rig developed in the TINT laboratory, where torque, rotational speed, and temperature were systematically varied, and the wear and service life of a polymer gear meshing with either a smooth or a rough pinion were compared. The results showed that under lower loads, the polymer gear paired with a smooth pinion achieved up to four times longer service life than with a rough pinion due to minimal wear caused by the smoother surface, whereas the rough pinion led to significantly more pronounced abrasive wear because of its higher roughness parameters. As the load increased, thermal degradation accelerated material failure, reducing the difference in service life between the two gear pairs, since thermo-mechanical effects became dominant and the influence of surface roughness diminished. The study confirms that the surface quality of the pinion is particularly crucial at lower loads, where it can significantly affect the reliability and durability of polymer gears. hrapavost površine polimerni zobnik jekleni pastorek obrabni mehanizmi življenjska doba tribologija surface roughness polymer gear steel pinion wear mechanisms service life tribology true false false [T. Perko] Slovenski jezik Angleški jezik Diplomsko delo/naloga 2026-03-20 08:30:38 2026-03-20 08:30:43 2026-03-24 12:37:09 0000-00-00 00:00:00 2026 0 Ljubljana 0 XI, 27 f. 0000-00-00 NiDoloceno NiDoloceno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 621.83.052:678.7(043.2) 283335 272816131 46634.pdf 46634.pdf 1 F1B4153E5AB7485C96D0C2B2B8D94289 78a5b85a7930aae0873a4dcfc252453c8f557c549ed3f351a4a082e8b0b400bd 9dc48057-242e-11f1-b0ab-0050569b8976 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=230945 Fakulteta za strojništvo 0 0 0