Razvoj i primjena AC MIG postupka zavarivanja

undergraduate thesis

• Title (english): Development and application of the AC MIG welding process
• Author: Patrik Stunja
• Mentor: Ivica Garašić (mentor)
• Granter: University of Zagreb; Faculty of Mechanical Engineering and Naval Architecture; Zagreb
• Defense date and country: 2022-09-28, Croatia
• Scientific / art field, discipline and subdiscipline: TECHNICAL SCIENCES; Mechanical Engineering

Abstract

Rad se bavi razvojem i primjenom AC MIG postupka zavarivanja. Naglasak je na razvoju MIG postupka zavarivanja sa stanovišta primjene modificiranih postupaka prijenosa metala u električnom luku s posebnim naglaskom na upotrebu izmjenične struje. Objašnjeni su konvencionalni i modificirani postupci. Opisan je utjecaj vrste struje i polariteta na zavarivanje. Navedene su značajke izmjenične struje i primjena AC MIG postupka te utjecaj pojedinih parametara poput EN omjera i frekvencije. U eksperimentalnom dijelu zavareni su kutni zavari u PF položaju, s variranjem iznosa balansa, kako bi se postigla veća produktivnost u odnosu na konvencionalni MIG postupak. Dobiveni rezultatom postignuta je brzina zavarivanja veća za čak 80% na balansu postavljenom na -30. Zaključno, ocijenjena je primjenjivost AC MIG postupka zavarivanja u realnim uvjetima zavarivačke proizvodnje aluminijskih konstrukcija.

Abstract (english)

The paper deals with the development and application of the AC MIG welding process. The emphasis is on the development of the MIG welding process from the point of view of applying modified methods of metal transfer in the electric arc with special emphasis on the use of alternating current. Conventional and modified procedures are explained. The influence of current type and polarity on welding is described. The characteristics of alternating current and the application of the AC MIG procedure are listed, as well as the influence of certain parameters such as the EN ratio and frequency. In the experimental part, fillet welds were welded in the PF position, with varying amounts of balance, in order to achieve higher productivity compared to the conventional MIG process. As a result, the welding speed is even 80% higher on the balance set at -30. In conclusion, the applicability of the AC MIG welding procedure in the real conditions of the welding production of aluminum structures was evaluated.

• Keywords: AC MIG; EN omjer; balans; frekvencija; aluminij
• Keywords (english): AC MIG; EN ratio; balance; frequency; aluminium
• Language: croatian
• URN:NBN: urn:nbn:hr:235:460794
• Study programme: Title: Mechanical Engineering; Study programme type: university; Study level: undergraduate; Academic / professional title: sveučilišni/a prvostupnik/ prvostupnica (baccalaureus/baccalaurea) inženjer/inženjerka strojarstva (sveučilišni/a prvostupnik/ prvostupnica (baccalaureus/baccalaurea) inženjer/inženjerka strojarstva)
• Type of resource: Text
• File origin: Born digital
• Access conditions: Open access
• Created on: 2022-09-22 20:23:03