zaključna naloga Razvojno raziskovalnega programa I. stopnje Strojništvo
Žan Oražem (Author), Damjan Klobčar (Mentor)

Abstract

V današnjem času je uporaba aditivnih tehnologij vse pogostejša. Omogoča izdelavo kompleksnih izdelkov v kratkem času in z majhno porabo materiala, kar precej zmanjša stroške izdelave. Veliki prednosti aditivnih tehnologij sta tudi natančnost in ponovljivost, kar je ključnega pomena v sodobni industriji. V eksperimentalnem delu zaključne naloge smo uporabljali tehnologijo obločnega navarjanja žice po postopku CMT. Glavni cilj naloge je bila analiza medvarkovnih temperatur pri oblikovnem obločnem navarjanju bakrove zlitine CuAl8. Ugotovili smo, da začetna temperatura varjenja ne sme presegati 260 %C. V primeru, da je temperatura višja, prihaja do razlivanja vara. Temperatura tudi ne sme biti nižja od 230 %C. Če je nižja od navedene, prihaja do oblikovanja neustrezne geometrije navarov. Spoznali smo, da se pri prevelikem vnosu energije varjenec prekomerno segreje, kar negativno vpliva na kakovost vara. Prevelik vnos energije se zgodi pri začetni temperaturi navarjanja nad 260 %C in pri prenizki hitrosti navarjanja, ki znaša 4 mm/s ali manj.

Keywords

diplomske naloge;broni;varjenje;MIG;robotsko navarjanje;CuAl8;medvarkovne temperature;

Data

Language: Slovenian
Year of publishing:
Typology: 2.11 - Undergraduate Thesis
Organization: UL FS - Faculty of Mechanical Engineering
Publisher: [Ž. Oražem]
UDC: 621.791.75:669.35(043.2)
COBISS: 16778779 Link will open in a new window
Views: 681
Downloads: 192
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Other data

Secondary language: English
Secondary title: An influence of weld interpass temperature at wire arc additive manufacturing of CuAl8 alloy
Secondary abstract: Nowadays, the use of additive manufacturing technologies is becoming more and more frequent. Additive manufacturing technologies enable the production of complex products in a short time, with a low consumption of materials, which greatly decreases the production costs. A considerable advantage of additive manufacturing technologies are accuracy and repeatability, which are both crucial in the modern industry. In the practical part of the paper, we used the CMT wire arc additive manufacturing process. The main aim of the paper was to conduct an analysis of weld interpass temperatures in wire arc additive manufacturing of CuA18 alloy. We determined that the starting temperature of welding must not exceed 260 °C. If the temperature is higher, the welding joints can spill. On the other hand, the temperature must not be lower than 230 °C, in which case the welding build-ups are not formed appropriately. What is more, in case of excessive energy input, the weld heats too much, which negatively impacts the quality of the welding joint. An excessive energy input occurs if the starting temperature of the additive manufacturing is above 260 °C and if the speed of additive manufacturing is equal to 4 mm/s or less.
Secondary keywords: bronze;welding;MIG;robotic additive manufacturing;CuAl8;weld interpass temperatures;
Type (COBISS): Final paper
Study programme: 0
Embargo end date (OpenAIRE): 1970-01-01
Thesis comment: Univ. v Ljubljani, Fak. za strojništvo
Pages: XV, 36 f.
ID: 11211679
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