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Prilog istraživanju uticaja raznosmernog tečenja metala na parametre procesa hladnog istiskivanja delova složenih geometrijskih oblika

A contribution to the investigation of divided material flow influence to the process parameters of complex shapes cold extrusion

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2015
Disertacija.pdf (6.860Mb)
IzvestajKomisije.pdf (324.3Kb)
Author
Skakun, Plavka
Mentor
Plančak, Miroslav
Committee members
Stefanović, Milentije
Romhanji, Endre
Kočov, Atanas
Vilotić, Dragiša
Plančak, Miroslav
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Abstract
U disertaciji je elaborirana mogućnost primene relaksirajućih otvora kod istiskivanja delova sa ozubljenjem u cilju smanjenja parametara procesa. Primenjena su dva modela deformisanja, kada je otvor u pripremku i kada je otvor u žigu. Metodom gornje granice izvršena je teorijska analiza procesa i kreirano rešenje na osnovu koga su određeni deformaciona sila, pritisak na žig i promena geometrije dela. Pomoću eksperimenta istiskivanja i numeričke simulacije procesa izvršena je verifikacija teorijskog rešenja. Teorijski, eksperimentalni i rezultati simulacije procesa su pokazali da primena relaksirajućih otvora na analizirane tipove ozubljenja dovodi do smanjenja deformacione sile i pritiska u procesu.
Possibility of flow relief openings applying in cold extrusion of gear-like elements in order to reduce the process parameters is elaborated in this thesis. Two different deformation models are analysed: when the opening is in the billet and when the opening is in the punch. Upper bound method was applied for the process analysis and determination of deformation force, punch pressure and change of part geometry. Extrusion experiment and numerical simulation of process are used for verification of theoretical solution. Theoretical, experimental and numerical results confirmed that application of flow relief openings enables reduction of deformation force and punch pressure in the process of gear-like elements extrusion.
Faculty:
University of Novi Sad, Faculty of Technical Science
Date:
18-02-2015
Keywords:
Hladno istiskivanje / Cold extrusion / ozubljeni elementi / podeljeno tečenje materijala / gear-like elements / divided material flow
[ Google Scholar ]
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http://www.cris.uns.ac.rs/DownloadFileServlet/Disertacija142592268639795.pdf?controlNumber=(BISIS)92580&fileName=142592268639795.pdf&id=3357&source=NaRDuS&language=sr
http://nardus.mpn.gov.rs/handle/123456789/1891
http://www.cris.uns.ac.rs/record.jsf?recordId=92580&source=NaRDuS&language=sr
http://www.cris.uns.ac.rs/DownloadFileServlet/IzvestajKomisije141891034364340.pdf?controlNumber=(BISIS)92580&fileName=141891034364340.pdf&id=3116&source=NaRDuS&language=sr

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