Modeliranje mehanskega odziva v orodju za visokotlačno litje

Hladnik, Peter (author), Halilovič, Miroslav (mentor)

Med procesom visokotlačnega litja pride do velikih obremenitev na konstrukcijo tlačnega orodja. Če so obremenitve prevelike, pride do mehanskih poškodb tlačnega orodja. V nalogi smo obravnavali mehansko stanje stabilne okvirne plošče v območju spodnjega stranskega jedra. Veliko komponent tlačnega orodja je v medsebojnem kontaktu. Predstavili smo numerične metode za obravnavo mehanike kontakta. Lastnosti teh metod so predstavljene na poenostavljenem primeru. Mehanski odziv okvirne plošče smo določili z numeričnimi simulacijami. Spreminjanje radijev in naklona nima vpliva na kontaktni tlak. S povečevanjem radijev se natezne napetosti na kritičnih mestih zmanjšajo, prav tako tudi napetosti vzdolž radijev. Velik vpliv na velikosti napetosti in zdrsov ima trenje.

• Language: Slovenian
• Keywords: tlačno orodje, mehanske poškodbe, mehanika kontakta, numerični model, napetosti, trenje
• Work type: Master's thesis/paper
• Organization: FS - Faculty of Mechanical Engineering
• Year: 2018
• PID: 20.500.12556/RUL-105895
• Publication date in RUL: 22.12.2018

Secondary language

• Language: English
• Title: Numerical analysis of mechanical behaviour in high pressure die casting tool

Abstract

During high pressure die casting process large strains appear on die casting tool. Due to large strains mechanical damage can occur. Numerical analysis were made for the tool's fixed frame plate around lower side core. Many components of die casting tool are in contact with each other. In thesis we presented numerical methods for treatment of contact mechanics. Properties of this methods were presented on simplified model. Based on results of numerical analysis we can conclude, that tensile stresses in critical areas are lower when the radius is larger and also stresses are smaller along the larger radius. Friction has a significant effect on size of stresses and slips.

• Keywords: die casting tool, mechanical damage, contact mechanics, numerical model, stresses, friction