20.500.12556/RUL-125614 Vpliv pred-deformiranja torzijske palične vzmeti na njeno relaksacijo Influence of the torsion bar manufacturing method on its life time Zaključna naloga obravnava histerezo ter popuščanje torzijskih paličnih vzmeti v odvisnosti od pred-deformiranja in načina izdelave torzijskih vzmeti. Histereza in popuščanje sta bila obravnavana za dve različni metodi izdelave torzijskih vzmeti in sicer po metodi A, kjer je bila po valjanju vzmet pred-deformirana na končno vrednost, ter po metodi B, kjer je bila po brušenju vzmet delno pred-deformirana, nato valjana in še enkrat pred-deformirana na končno vrednost. Eksperimentalno smo pri histerezi ugotovili, da je bila generacija toplote v vzmeteh, izdelanih po metodi A, višja kot pri tistih izdelanih po metodi B. Pri popuščanju vzmeti pa smo ugotovili, da imajo tiste vzmeti po metodi B, dvakrat večji padec torzijskega momenta kot vzmeti izdelane po metodi A. Za zagotavljanje optimalne torzijske vzmeti moramo imeti čim manjše pred-deformiranje, kolikor je možno, kot tudi, da se uporabljajo postopki izdelave vzmeti po metodi A, ker nam omogoča manjše popuščanje torzijske palične vzmeti. The final task deals with the hysteresis and loosening of torsion bar springs depending on the presetting and the method of manufacturing torsion springs. Hysteresis and relaxation were considered for two different methods of making torsion springs, namely method A, where after rolling the spring was presetted to the final value, and method B, where after grinding the spring was partially presetted, then rolled and again presetted to the final value. Experimentally in hysteresis we found that the heat generation in springs made by method A was higher than in those made by method B. When the springs were loosened, we found that those springs according to method B had a twice as large drop in torsional moment as springs made according to method A. To ensure optimal torsion springs, we need to have as little presetting as possible, as well as to use spring manufacturing procedures according to method A, because it allows us less loosening on the torsion bar spring. torzijska palična vzmet histereza popuščanje vzmeti pred-deformiranje kot zasuka torsion bar spring hysteresis spring loosening presetting angle of rotation true false false [M. Močilnik] Slovenski jezik Angleški jezik Zaključna naloga 2021-03-27 08:31:01 2021-03-27 08:31:05 2023-12-13 08:19:13 0000-00-00 00:00:00 2021 0 Ljubljana 0 XII, 22 f. 0000-00-00 NiDoloceno NiDoloceno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 1970-01-01 62-272.5:539.98:539.3(043.2) 228323 61779459 6837.pdf 6837.pdf 1 5BC3F3A3F97559D9AE8A100941F779B2 39538bf7a79f4220d85053766b1b4009c282e2d44ecba6cca760f04432922417 bef1e632-a1bb-11eb-a523-00155dcfd717 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=141412 Fakulteta za strojništvo 0 0 0