Faculty of Mechanical Engineering, Lj. (FSLJ)
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Napetosti v cementiranem in kaljenem zobniku z ravnimi zobmi : zaključna naloga Univerzitetnega študijskega programa I. stopnje Strojništvo - Razvojno raziskovalni programGaberšček, GregorCementacija in kaljenje omogočata, da ima zobnik žilavo jedro in trdo površino, zato imajo termično obdelani zobniki boljšo trdnost in obrabno odpornost v primerjavi s termično neobdelanimi. Postopek ... utrjevanja površine izboljša odpornost zobnika na sunkovite mehanske obremenitve in na obrabo. V tem delu smo se posvetili izključno obravnavi trdnosti zobnika. Primerjali smo, kakšen zobnik bolje prenaša statično mehansko obremenitev ter vzroke za to. Postopek termične obdelave smo simulirali v programu ANSYS z metalurškim paketom DANTE, s čimer smo predvideli porazdelitev zaostalih napetosti. To je bilo začetno stanje ob dodajanju mehanske obremenitve na zob zobnika. Za primerjavo smo simulirali enak zob, ki je bil deležen zgolj mehanske obremenitve. Tak primer smo tudi analitično preračunali. Pri iskanju vzrokov za nastalo stanje smo ugotovili, da se pri nastajanju martenzita povečajo tlačne napetosti. Te skupaj s krčenjem zaradi ohlajanja ustvarijo površinsko plast s tlačnimi napetostmi. Videli smo, da v vsakem primeru ta plast vpliva na boljše prenašanje mehanske obremenitve. Na koncu so analitični rezultati odstopali od numeričnih v vrednostih do 150 MPa. Ob upravičenih razlogih, kot so izbira robnih pogojev, mesta rezultatov in koeficienti v enačbah smo sklepali, da so pravilni. Potrdili in pojasnili smo, zakaj so termično obdelani zobniki boljši kot termično neobdelani.Type of material - undergraduate thesis ; adult, seriousPublication and manufacture - Ljubljana : [G. Gaberšček], 2021Language - slovenianCOBISS.SI-ID - 82835203
Author
Gaberšček, Gregor
Other authors
Nagode, Marko |
Šeruga, Domen
Topics
diplomske naloge |
zobniki |
numerične analize |
analitika |
ogljičenje |
kaljenje |
zaostale napetosti |
thesis |
spur gears |
numerical analysis |
analytics |
carburising |
quenching |
residual stresses
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UN 0000001537 IN: 80001537 UN 1537 IN: 80001537 |
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Database name | Field | Year |
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Links to authors' personal bibliographies | Links to information on researchers in the SICRIS system |
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Gaberšček, Gregor | |
Nagode, Marko | 13469 |
Šeruga, Domen | 29047 |
Source: Personal bibliographies
and: SICRIS
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