20.500.12556/DKUM-98791 Vpliv natezne trdnosti materiala odkovka na obstojnost prebijalnega pestiča magistrsko delo Effect of forging material tensile strength on the durability of punching tool V magistrski nalogi je predstavljen vpliv natezne trdnosti odkovka na obstojnost prebijalnega pestiča pri prebijanju odkovkov ohišja krmilnega mehanizma. Namen raziskave je bil ugotoviti, kako sprememba mehanskih lastnosti materiala vpliva na silo prebijanja, napetostno stanje orodja in posledično na njegovo obstojnost. Najprej je bil izveden teoretični izračun sile prebijanja za različne vrednosti natezne trdnosti materiala. Nato so bile v programu DEFORM izvedene numerične simulacije procesa prebijanja, pri katerih je bil analiziran potek sile ter porazdelitev napetosti na prebijalnem pestiču in puši. Simulacije so bile izvedene za natezne trdnosti materiala 800 MPa, 900 MPa in 1000 MPa. Dobljeni rezultati so bili primerjani s teoretičnimi izračuni. Za preverjanje vpliva natezne trdnosti na obstojnost pestiča so bili analizirani tudi podatki iz proizvodnje. Izvedena je bila analiza rezultatov nateznih preizkusov materiala, meritev električnega toka prebijalnega stroja in dosežene obstojnosti pestičev. Na podlagi zbranih podatkov je bila določena povezava med natezno trdnostjo materiala in življenjsko dobo prebijalnega orodja. Rezultati so pokazali, da se z naraščanjem natezne trdnosti materiala povečujejo sila prebijanja in obremenitve orodja. Analiza proizvodnih podatkov je pokazala, da se najvišje obstojnosti pestičev pojavljajo pri nižjih nateznih trdnostih materiala, medtem ko višje natezne trdnosti povzročajo večje mehanske obremenitve in hitrejšo obrabo pestičev. Ugotovitve magistrske naloge potrjujejo, da natezna trdnost odkovka pomembno vpliva na obstojnost prebijalnega orodja. This master's thesis presents the influence of forged part tensile strength on the service life of a punching punch used in the punching process of steering housing forgings. The aim of the research was to determine how changes in the mechanical properties of the material affect the punching force, the stress state of the tooling, and consequently its durability. First, a theoretical calculation of the punching force was carried out for different tensile strength values of the material. Numerical simulations of the punching process were then performed using the DEFORM software package. The simulations were used to analyse the force-displacement relationship as well as the stress distribution on the punch and the die. Simulations were conducted for material tensile strengths of 800 MPa, 900 MPa, and 1000 MPa. The obtained results were compared with the theoretical calculations. To verify the influence of tensile strength on punch durability, production data were also collected and analysed. The analysis included tensile test results, measurements of the punching machine electrical current, and punch service life data. Based on the collected information, the relationship between material tensile strength and tooling durability was determined. The results showed that increasing material tensile strength leads to higher punching forces and greater tool loading. The numerical simulations confirmed an increase in stresses acting on both the punch and the die as the tensile strength increased. The analysis of production data revealed that the highest punch durability was achieved at lower tensile strength values, whereas higher tensile strengths resulted in greater mechanical loading and faster tool wear. The findings of this thesis confirm that the tensile strength of the forging has a significant influence on the service life of punching tools and should therefore be considered when evaluating tool performance and process optimisation. prebijalni pestič obstojnost odkovek natezna trdnost sila prebijanja punching tool durability forging tensile strength punching force true true false [K. Vodeb] Slovenski jezik Angleški jezik Magistrsko delo/naloga 2026-07-08 09:26:49 2026-09-01 09:25:00 2026-09-16 03:11:11 0000-00-00 00:00:00 2026 0 Maribor 0 Maribor 1 spletni vir (1 datoteka PDF (XV, 53 f.)) 0000-00-00 NiDoloceno NiDoloceno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 2029-07-08 621.961.4.016:539.412(043.2) 291085827 MAG_Vodeb_Klemen_2026.pdf MAG_Vodeb_Klemen_2026.pdf 1 D5D6C1DA3A5D83C1EFC170097150A915 181c2622b1027aae4513eeb7bbb4f644d5fa99df261fbeeeb0d64cdef5365f64 2c508903-a550-11f1-b1f1-00155d0001be https://dk.um.si/Dokument.php?lang=slv&id=211066 Fakulteta za strojništvo 0 0 0