Application of WAAM technology in production of aluminum pipes using CMT process

Tema ovog diplomskog rada je primjena aditivne proizvodnje električnim lukom i žicom u svrhu izrade aluminijskih cijevi pomoću CMT postupka. U teorijskom dijelu objašnjen je pojam aditivne proizvodnje zajedno s principom izrade i karakteristikama. Nadalje, detaljno je objašnjena tehnologija aditivne proizvodnje električnim lukom i žicom s naglaskom na primjenu aluminija i postupke zavarivanja aluminija. Jedan od postupaka zavarivanja aluminija je CMT, modificirana verzija MIG/MAG postupka zavarivanja. Uz detaljan opis principa prijenosa metala u električnom luku, navedene su karakteristike postupka i navedeni osnovni modeli. Na kraju dani su primjeri primjene CMT postupka u WAAM tehnologiji te objašnjeni rezultati ispitivanja. U eksperimentalnom dijelu izrađene su cijevi od dvije aluminijske legure WAAM tehnologijom koristeći CMT postupak. Provedena su ispitivanja mehaničkih svojstava i mikrostrukture, a na kraju je ocijenjena primjenjivost CMT postupka u WAAM tehnologiji i dan zaključak.Topic of this diploma thesis is application of wire and arc additive manufacturing technology used for purposes of manufacturing aluminum pipes with CMT welding process. In theoretical part concept of additive manufacturing is explained along with the manufacturing principle and characteristics. Furthermore, the technology of arc and wire additive manufacturing is explained in detail, with emphasis on aluminum welding processes. One of the aluminum welding processes is CMT, a modified version of MIG/MAG welding process. With a detailed description of the principle of metal transfer in an arc, the process characteristics and the basic models are given. Finally, example of the application of CMT procedure in WAAM technology is explained along with test results. In the experimental part, two aluminum alloy tubes were manufactured using WAAM technology and CMT process. Mechanical properties and microstructure were tested, and in the end applicability of the CMT process in WAAM was evaluated and conclusion was given