magistrsko delo magistrskega študijskega programa II. stopnje Strojništvo
Matevž Čubej (Author), Damjan Klobčar (Mentor)

Abstract

Primaren proces za spajanje bakrenih električnih kontaktov je v preteklosti bilo spajkanje. Spajkanje sicer daje odlične rezultate z vidika zagotavljanja prevodnosti kontakta, vendar je časovno zamuden, zahteven za izvedbo ter problematičen za avtomatizacijo. Zaradi želje po zmanjšanju časa cikla in posledično stroškov se je kot alternativa pojavilo varjenje TIG. Dobršen del stroškov obratovanja TIG varilne celice predstavlja zaščitni plin. Raziskovali smo možnost implementacije zaščitnega plina dušika v proces ter njegov vpliv na kakovost spoja. Rezultate smo primerjali s standardno uporabljenimi zaščitnimi plini, tj. argonom in helijem. Ovrednotili smo jih vizualno ter številčno z uporabo nateznega preizkusa in analizo mikrostrukture zvarov. Prišli smo do zaključkov, da z uporabo dušika kot zaščitni plin doseganje predpisanih zahtev, z izjemo vizualne, ni mogoče dosegati. Primerjava z inertnima zaščitnima plinoma je potrdila tezo, da zvarni spoji izvedeni v zaščitni atmosferi inertnega plina ustrezajo vsem zahtevam. Izvedena stroškovna analiza je potrdila končni izbor zaščitnega plina argona za nadaljnjo proizvodnjo.

Keywords

magistrske naloge;varjenje TIG;varjenje bakra;spajanje bakrenih kontaktov;zaščitni plin;dušik;argon;helij;

Data

Language: Slovenian
Year of publishing:
Typology: 2.09 - Master's Thesis
Organization: UL FS - Faculty of Mechanical Engineering
Publisher: [M. Čubej]
UDC: 621.791.75:669.3(043.2)
COBISS: 71185155 Link will open in a new window
Views: 338
Downloads: 127
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Other data

Secondary language: English
Secondary title: The influence of shielding gases in TIG welding of copper
Secondary abstract: For many years the primary process for joining electrical copper contacts was soldering. Soldering gives great results in terms of joint conductivity, but is slow, inefficient, and problematic to automate. Due to the need of lowering costs and cycle time an alternative in welding TIG was found. A significant amount of costs of welding TIG is the shielding gas. We analysed an option of implementing nitrogen gas in the process and its influence on the process output. We compared results with regularly used shielding gases, such as argon and helium. We evaluated results visually and numerically with stress test and microstructure analysis. The conclusion was that with using nitrogen as a shielding gas no process requirement other than visual can be achieved. We confirmed the thesis that with using helium or argon as shielding gas requirements can be achieved. We also conducted a cost analysis which confirmed the current shielding gas choice, that is argon, as correct to continue manufacturing the product.
Secondary keywords: master thesis;welding TIG;copper welding;welding of copper contacts;shielding gas;nitrogen;argon;helium;
Type (COBISS): Master's thesis/paper
Study programme: 0
Embargo end date (OpenAIRE): 1970-01-01
Thesis comment: Univ. Ljubljana, Fak. za strojništvo
Pages: XXII, 72 str.
ID: 13085140
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