Automated TIG welding of copper alloys

Cilj ovog diplomskog rada bio je ispitati utjecaj parametara na izgled i kvalitetu dobivenog zavara. Proces zavarivanja odvijao se uz pomoć automata za zavarivanje. Promjenjivi parametri kod eksperimenta bili su jakost struje i brzina zavarivanja. Rad se sastoji od teoretskog i eksperimentalnog dijela. U teoretskom dijelu rada opisana su osnovna svojstva bakra i njegovih legura. Zatim se u radu opisuje princip TIG zavarivanja. Opisana je osnovna oprema, prednosti, nedostaci te princip rada kod postupka. Nakon toga slijedi oblikovanje spojeva, dodatni materijali i utjecaj različitih parametara na oblik zavarenog spoja. U posljednjem poglavlju teoretskog dijela opisani su neki od dostupnih automata na tržištu. U eksperimentalnom dijelu rada opisuje se proces zavarivanja ETP bakra pod utjecajem različitih parametara. Dobiveni uzorci su zatim izrezani na tri epruvete za daljnja ispitivanja. Drugi dio eksperimenta bio je test savijanja prema normi EN ISO 5173. Posljednji dio u eksperimentu bio je dobivanje makro presjeka uzoraka.The aim of this master thesis was to examine the influence of welding parameters on the appearance and quality of the obtained weld. Welding process was performed with an automated welding system. The variable parameters in the experiment were welding speed and welding current. The thesis consists of a theoretical and an experimental part. The theoretical part of the thesis describes the basic properties of copper and its alloys. Then the thesis describes the principle of GTAW. The basic equipment, advantages, disadvantages and the principle of the welding procedure. This is followed by the formation of the joints, additional materials and the influence of various parameters on the shape of the welded joint. The last chapter of the theoretical part describes some of the available automated welding systems on the market. The experimental part of the thesis describes the welding process of ETP copper under the influence of different parameters. The obtained samples were then cut into three tubes for further testing. The second part of the experiment was the bend test according to EN ISO 5173. The last part of the experiment was obtaining macro cross-sections of the samples