diplomsko delo Visokošolskega strokovnega študijskega programa I. stopnje Strojništvo
Tine Kancler (Author), Damjan Klobčar (Mentor), Drago Bračun (Co-mentor)

Abstract

Prekomerna obraba funkcionalnih površin izdelkov in orodij pomeni velik strošek, saj je potrebno obrabljeno orodje zamenjati z novim oz. ga popraviti z reparaturnim varjenjem. Izziv pri tem predstavlja določanje varilnih parametrov in predvsem geometrije navarjanja. Cilj diplomske naloge je bil določiti optimalno stopnjo prekritja navarov za dosego ravne površine. Eksperimentalno delo je vključevalo oblikovno obločno navarjanje z žico. Uporabili smo triosni CNC manipulator ter napravo za varjenje MIG/MAG, z dodajno žico VAC 60. Eksperimentalno smo navarjali dvojice zvarov z naraščajočim zamikom pri različnih procesnih parametrih in površino vzorcev izmerili s 3D merilnikom oblike teles. Te oblike smo analizirali z algoritmom, razvitim v okviru naloge. Za določanje optimalne stopnje prekritja navarov smo uporabili kriterij minimalne razlike med maksimumom in sedlom med navari ter razmerje višin zvarov v dvojici. Ugotovili smo, da na obliko zvara najbolj vpliva linearni vnos energije. Veliko vlogo pri navarjanju več prekrivnih zvarov ima površinska napetost taline.

Keywords

diplomske naloge;varjenje MIG/MAG;oblika;obločno;navarjanje;žica;3D;meritve;oblike teles;algoritni;navari;analize;optimizacija;dvojice zvarov;

Data

Language: Slovenian
Year of publishing:
Typology: 2.11 - Undergraduate Thesis
Organization: UL FS - Faculty of Mechanical Engineering
Publisher: [T. Kancler]
UDC: 621.791.75:531.717.2(043.2)
COBISS: 136082435 Link will open in a new window
Views: 136
Downloads: 52
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Other data

Secondary language: English
Secondary title: Optimisation of weld step-over for evenly welded surface
Secondary abstract: Excessive wear of functional surfaces of products and tools is a huge cost because the worn tools must be replaced with new ones or repaired with repair welding. The challenge here is the determination of welding parameters but above all the geometry of a weld bead. The aim of the thesis was to determine the optimal weld step-over to achieve a flat surface. The experimental work consisted of wire and arc additive manufacturing. We used a 3-axis CNC manipulator and a MIG/MAG welding machine with a VAC 60 filler wire. Experimentally, we used a pair of welds with a growing pattern at different process parameters and measured the surface of the samples with a 3D body shape gauge. These forms were analyzed using an algorithm developed as part of the thesis. The criterion of minimum difference between the maximum and the saddle between the welds and the ratio of the heights of the welds in the pair was used to determine the optimum degree of welds overlap. We found that the linear energy input influences the most on the shape of the weld. The surface tension of the melt plays a vital role in weld surfacing.
Secondary keywords: thesis;MIG/MAG welding;wire and arc additive manufacturing;3D laser profilomer;algorithm for analyzing weld beads;
Type (COBISS): Bachelor thesis/paper
Study programme: 0
Embargo end date (OpenAIRE): 1970-01-01
Thesis comment: Univ. v Ljubljani, Fak. za strojništvo
Pages: XXIV, 64 str.
ID: 16400983
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