Vpliv laserskega hrapavljenja gravurnih oblik na zmanjšanje dvoplastnosti na končnem odlitku

Krek, Luka (author), Petkovšek, Rok (mentor), Mur, Jaka (co-mentor)

Zaradi prehitrega potovanja taline ob tlačnem litju, se na odlitku pojavi defekt imenovan dvoplastnost. Za upočasnitev hitrosti potovanja taline bi gravure hrapavljali oziroma naredili hrapave. S primerjavo različnih metod hrapavljenja sem izbral obdelavo z laserskim žarkom, ki se je izkazala za najbolj optimalno. S testnim litjem smo dokazali vpliv hrapavljenja gravurnih oblik na zmanjšanje dvoplastnosti na odlitku, na preizkuševališču z laserjem pa sem določil optimalne parametre laserske obdelave vzorcev za doseganje hrapavosti Rz 45 in izdelal možno obliko za nadaljnje hrapavljenje gravurnih oblik. Dodatno sem izdelal CAD model za uporabo na 3D laserskem sistemu.

• Language: Slovenian
• Keywords: tlačna litja, hrapavljenja, gravurne oblike, dvoplastnosti, laserske obdelave, modeliranja
• Work type: Final paper
• Typology: 2.11 - Undergraduate Thesis
• Organization: FS - Faculty of Mechanical Engineering
• Place of publishing: Ljubljana
• Publisher: [L. Krek]
• Year: 2021
• Number of pages: XII, 36 str.
• PID: 20.500.12556/RUL-130459
• UDC: 621.746.019.621.9.048.7(043.2)
• COBISS.SI-ID: 83105795
• Publication date in RUL: 15.09.2021

Secondary language

• Language: English
• Title: Influence of making engraving shapes rough with laser on the reduction of delamination on final cast

Abstract

Due to the rapid travel of the melt during die casting, a defect called delamination occurs on the casting. To reduce the speed of traveling of the melt, the engravings would be roughened. By comparing different roughing methods, I chose the laser beam treatment that proved to be the most optimal. With test casting, we proved the influence of roughness of engraving shapes on the reduction of delamination on the casting, and at the laser test site I determined the optimal parameters of laser processing of samples for roughness Rz 45 and made a possible shape for future roughing of engraving shapes. In addition I made a CAD model for a 3D laser system.

• Keywords: die castings, roughenings, engraving shapes, delaminations, laser treatments, modelings