Termo-mehanska analiza vijačne zveze v segmentu orodja za visokotlačno litje aluminija

Kobal, Mitja (author), Mole, Nikolaj (mentor)

Orodje za visokotlačno litje aluminija je izpostavljeno cikličnim temperaturnim in mehanskim obremenitvam, pri čemer so posamezni segmenti gravurnega dela orodja izpostavljeni velikim obremenitvam. Z namenom lažjega vzdrževanja orodja, so posamezni deli orodja konstruirani kot privijačeni segmenti. V programskem okolju Abaqus smo izvedli termo-mehansko analizo take konstrukcije. Upoštevali smo kontaktne razmere med deli orodja ter ciklično ponavljajoče se obremenitve, do katerih pride med procesom visokotlačnega litja aluminija. Analizirali smo referenčni primer konstrukcije in potrdili ciklične obremenitve kot razlog za porušitev vijakov. Na podlagi opravljene analize termo-mehanske stanja v obstoječem orodju, je bila izvedena konstrukcijska modifikacija orodja. Nova izvedba privijačenja segmenta v orodje izkazuje ugodnejše napetostno stanje.

• Language: Slovenian
• Keywords: toplotna analiza, mehanska analiza, tlačno orodje, vijačna zveza, ciklična obremenitev, MKE
• Work type: Master's thesis/paper
• Typology: 2.09 - Master's Thesis
• Organization: FS - Faculty of Mechanical Engineering
• Place of publishing: Ljubljana
• Publisher: [M. Kobal]
• Year: 2024
• Number of pages: XXII, 64 str.
• PID: 20.500.12556/RUL-158746
• UDC: 621.74:620.173.2:546.62(043.2)
• COBISS.SI-ID: 202830339
• Publication date in RUL: 20.06.2024

KOBAL, Mitja, 2024, Termo-mehanska analiza vijačne zveze v segmentu orodja za visokotlačno litje aluminija [online]. Master’s thesis. Ljubljana : M. Kobal. [Accessed 11 April 2025]. Retrieved from: https://repozitorij.uni-lj.si/IzpisGradiva.php?lang=eng&id=158746

Secondary language

• Language: English
• Title: Thermo-mechanical analysis of screw joints in tool segments for high-pressure aluminum die casting

Abstract

Die casting tool for casting aluminum alloys endures cyclic thermal and mechanical loads. Particular parts of the tool are subjected to high loads. With the goal of simplifying the maintenance process, parts of the tool are constructed as separate bolted segments. In this M. Sc. thesis, we made a thermo-mechanical analysis in Abaqus software environment. Contacts between tool parts and cyclic load, which appear during high pressure aluminum casting, were taken into account. First, we analysed a reference construction which experienced bolt failure and confirmed cyclic loading as a responsible mechanism. Based on the analysis of thermo-mechanical state in die casting tool, modification of bolt joint was proposed. The new construction results in more favourable stress state.

• Keywords: thermal analysis, mechanical analysis, die casting tool, screw joint, bolt joint, fatigue analysis, FEM