Analiza vpliva temperaturnega raztezanja tlačnega orodja na prelivanje taline v procesu tlačnega litja aluminija

Žužek, Jan (author), Starman, Bojan (mentor), Mole, Nikolaj (comentor)

Orodje za tlačno litje aluminija je izpostavljeno cikličnim temperaturnim obremenitvam, pri čemer med posameznim ciklom prihaja do njegovega neenakomernega temperaturnega raztezanja. Posledica neenakomernega raztezanja je zmanjšanje kontaktnega pritiska med gravurnimi deli orodja, kar lahko v določenih primerih vodi do prelivanja taline iz območja gravurnega dela. Kontaktni pritisk v delilni ravnini med stabilnim in gibljivim deloma orodja je mogoče zagotoviti z večjo zapiralno silo ali pa z ustrezno prilagoditvijo geometrije delilne ravnine. V okviru magistrske naloge bo izvedena numerična termo­mehanska analiza orodja v procesu tlačnega litja aluminija, pri katerem prihaja do težav s prelivanjem taline. Toplotna analiza bo izvedena v programskem okolju Magmasoft. Izračunano temperaturno polje bo nato prenešeno v programsko okolje Abaqus, ki omogoča na osnovi izvesti mehansko analizo kontaktnih razmer v orodju na osnovi metode končnih elementov. Na podlagi analize kontaktnih razmer bo izvedena geometrijska korekcija delilne ravnine s ciljem povečanja kontaktnega pritiska in s tem preprečitve prelivanja taline. Analiza rezultatov bo vključevala primerjavo kontaktnih razmer za obstoječo in korigirano geometrijo delilne ravnine. Predlagana korekcija geometrije bo preverjena tudi v proizvodnem procesu.

• Language: Slovenian
• Keywords: tlačno litje, toplotne deformacije, prelivanje taline, tlačno orodje, metoda končnih elementov, Abaqus
• Work type: Master's thesis/paper
• Typology: 2.09 - Master's Thesis
• Organization: FS - Faculty of Mechanical Engineering
• Place of publishing: Ljubljana
• Publisher: [J. Žužek]
• Year: 2026
• Number of pages: XXII, 66 str.
• PID: 20.500.12556/RUL-185964
• UDC: 621.745.56:669.018.258(043.2)
• COBISS.SI-ID: 288966915
• Publication date in RUL: 25.08.2026

Secondary language

• Language: English
• Title: Analysis of the influence of thermal expansion of die-casting tool on melt flashing during high-pressure aluminum die casting

Abstract

The thesis analyzes the influence of thermal expansion of die casting tools on the occurrence of melt flashing in high-pressure die casting of aluminum. The research is based on a numerical approach combining casting simulations in MagmaSoft and thermo-mechanical analysis in Abaqus. The temperature field of die inserts was transferred to the numerical model of the tool, where deformations and contact conditions at the parting surfaces were evaluated. Based on the results, critical areas with insufficient sealing were identified and geometric corrections of the tool were proposed. The effectiveness of the proposed modifications was confirmed through additional simulations and validated in production. The results indicate that proper consideration of thermally induced deformations reduces flashing and improves tool performance.

• Keywords: high-pressure die casting, thermal deformation, flashing, die casting tool, finite element method, Abaqus