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Vpliv oddaljenosti gorilnika pri oblikovnem obločnem navarjanju malolegiranega jekla
Babnik, Matej (Author), Klobčar, Damjan (Mentor) More about this mentor... This link opens in a new window

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Abstract
Aditivne tehnologije v zadnjem času pridobivajo na veljavi, saj omogočajo izdelavo komponent kompleksnih geometrij in zmanjšanje stroškov na podlagi zmanjšanja odpadnega materiala. V tem delu je obravnavan postopek oblikovnega obločnega navarjanja z varilno žico VAC 60 na konstrukcijsko jeklo. Definirali smo ugodne varilske parametre, s katerimi dosežemo kakovostne vare. Raziskali smo medsebojno povezanost parametrov obločne napetosti in jakosti varilnega toka v odvisnosti od dolžine prostega konca žice oz. oddaljenosti kontaktne šobe od substrata in kreirali teoretični model, ki popisuje njihovo medsebojno povezanost. Ugotovili smo, da je z uporabo kreiranega modela možno z veliko natančnostjo sklepati na dolžino prostega konca žice na podlagi meritev jakosti varilnega toka ali obločne napetosti v realnem času. Definirali smo tudi odzivni čas sistema oblikovnega obločnega navarjanja na nepredvideno spremembo geometrije substrata in zmožnost prilagoditve varilskih parametrov za ohranitev stabilnosti procesa varjenja.

Language:Slovenian
Keywords:aditivne tehnologije, oblikovno obločno navarjanje z žico, varjenje MIG/MAG, konstrukcijsko jeklo, varilna žica VAC 60 (SIST EN 440 G42 5C/M G3Si1)
Work type:Master's thesis/paper (mb22)
Tipology:2.09 - Master's Thesis
Organization:FS - Faculty of Mechanical Engineering
Year:2020
Publisher:[M. Babnik]
Number of pages:XXII, 68 str.
UDC:621.791:669.14(043.2)
COBISS.SI-ID:28009987 Link is opened in a new window
Views:161
Downloads:77
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Secondary language

Language:English
Title:Influence of electrical stickout in wire and arc additive manufacturing with low-alloy steel
Abstract:
Additive technologies have gained a significant importance over the past few years as they enable the fabrication of components of complex geometries and cost reduction by reducing material wastage. This thesis discusses the process of wire and arc additive manufacturing (WAAM) using G3Si1 (VAC 60) filler wire on mild steel plate. A favorable welding parameters with which we achieve quality welds were defined. We investigated the interconnection of welding voltage and current depending on contact tip to work distance and created a theoretical model that describes their interconnection. We found out that using the created model, it is possible to infer the wire stick out length with great accuracy based on measurements of welding voltage and current in real time. We also defined the response time of the WAAM system to an unforseen change in the substrate geometry and the ability to adjust the welding parameters to maintain the stability of the welding process.

Keywords:additive manufacturing, wire and arc additive manufacturing, MIG/MAG welding, mild steel, welding wire SIST EN 440 G42 5C/M G3Si1

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