20.500.12556/DKUM-78958 Analiza zaostalih napetosti med procesom izdelave teleskopske roke magistrsko delo Analysis of residual stresses during process of telescopic arm production V magistrski nalogi smo analizirali zaostale napetosti med procesom izdelave teleskopske roke. Zaostale napetosti v materialu se pogosto pojavijo kot posledica preoblikovalnih procesov, ki povzročijo plastično deformacijo materiala ali vnos toplote vanj. So zelo nezaželene zaradi možnega padca nosilnosti in drugih težav. Spremljali smo vrednosti in porazdelitev zaostalih napetosti na dveh enakih delih teleskopskih rok, narejenih iz plošč različnih šarž. Zaostale napetosti smo spremljali v štirih fazah – pred obdelovalnimi procesi, po laserskem izrezu, upogibu in varjenju. Zaostale napetosti smo merili s pomočjo magnetne metode z napravo SMMT-1. Nadaljnjo obdelavo signalov smo izvedli v Excelu in rezultate prikazali s prostorskimi grafi, ki smo jih primerjali med sabo. Odkrili smo razlike med polji zaostalih napetosti v vseh meritvenih fazah, največje so bile po upogibanju. In master thesis we focused on analysing residual stresses during process of telescopic arm production. Residual stresses in the material often occur due to transformation processes which cause plastic deformation or heat input to the material. They are undesirable since they may decrease load capacity or cause other problems. We monitored residual stress values and its distribution in two segments of telescopic arm. The segments were made from a shell plate with different batches. Residual stresses were observed during four phases - in base material before transformation, after laser cutting, bending, and welding. We measured residual stress with directional effective permeability method using SMMT-1. Measurements were processed in Excel and presented in 3D charts. We compared results between different plates. We found differences between fields of residual stresses in all measuring phases, the substantial difference was observed after bending. zaostale napetosti teleskopska roka analiza magnetna metoda merjenje Residual Stresses Telescopic Arm Analysis Directional Effective Permeability Measuring true true false [J. Mlinarič] Slovenski jezik Angleški jezik Magistrsko delo/naloga 2021-04-06 10:22:53 2021-05-03 11:39:55 2022-08-09 20:00:12 0000-00-00 00:00:00 2021 0 Maribor 0 Maribor XI, 58 str. 0000-00-00 NiDoloceno NiDoloceno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 620.172.21:621.7.011(043.3) 62124547 MAG_Mlinaric_Janez_2021.pdf MAG_Mlinaric_Janez_2021.pdf 1 FE01224E492842AB240DA263D76D87DC de332d63cb17c6c37203fdf45c1e1b3cdf8256246277716dd6b1571d4ef077be e5b3009e-a1cd-11eb-b545-00155d581298 20.500.12556/dkum/edf1760a-fb41-4e6d-8ff6-4d739a34b96c https://dk.um.si/Dokument.php?lang=slv&id=149843 Fakulteta za strojništvo 0 0 0