Vpliv laserskega varjenja na tesnost aluminjastega ohišja

Podrekar, Anže (author), Šturm, Roman (mentor)

V delu je bilo obravnavano lasersko varjenje aluminijaste zlitine EN AC-46000 z vidika doseganja tesnosti spojev. V eksperimentu so bili varjeni vzorci analizirani s testi tesnjenja, porušitve in z metalografijo. Vsi vzorci so bili tesni pri 1,7 bara in so zdržali tlak nad 6 barov, kar potrjuje funkcionalnost spojev. Kljub temu je bila opažena poroznost, ki lahko vpliva na dolgoročno zanesljivost. Ugotovljeno je bilo, da na kakovost vplivajo parametri varjenja, priprava površin in geometrija spoja. Lasersko varjenje se je izkazalo kot hitra in avtomatizirana alternativa varjenja z gnetenjem, ki bi bila z dodatnimi izboljšavami primerna za serijsko proizvodnjo.

• Language: Slovenian
• Keywords: aluminijasto ohišje, EN AC-46000, lasersko varjenje, poroznost, tesnost spojev, varjenje z gnetenjem, zvari
• Work type: Bachelor thesis/paper
• Typology: 2.11 - Undergraduate Thesis
• Organization: FS - Faculty of Mechanical Engineering
• Year: 2025
• Number of pages: XI, 35 f.
• PID: 20.500.12556/RUL-171471
• UDC: 621.791.725:620.179.2:669.715(043.2)
• COBISS.SI-ID: 247558403
• Publication date in RUL: 27.08.2025

Secondary language

• Language: English
• Title: The impact of laser welding on the tightness of an aluminium housing

Abstract

The study examined laser welding of the aluminium alloy EN AC-46000 in terms of achieving joint tightness. Welded samples were analyzed using leak tests, burst tests, and metallography. All samples were leak-tight at 1.7 bar and withstood pressures above 6 bar, confirming the functionality of the joints. However, porosity was observed, which may affect long-term reliability. It was found that weld quality is influenced by welding parameters, surface preparation, and joint geometry. Laser welding proved to be a fast and automated alternative to friction stir welding, which, with further improvements, could be suitable for mass production.

• Keywords: aluminium housing, EN AC-46000, laser welding, friction stir welding, porosity, weld tightness, welds