Primjena tehnike aktivnog hlađenja aditivne proizvodnje električnim lukom i žicom

master's thesis

• Title (english): Application of active cooling technique during wire and arc additive manufacturing
• Author: Adriana Grdić
• Mentor: Ivica Garašić (mentor)
• Granter: University of Zagreb; Faculty of Mechanical Engineering and Naval Architecture; Zagreb
• Defense date and country: 2022-07-18, Croatia
• Scientific / art field, discipline and subdiscipline: TECHNICAL SCIENCES; Mechanical Engineering; Production Mechanical Engineering

Abstract

Tema diplomskog rada je primjena tehnike aktivnog hlađenja pri aditivnoj proizvodnji električnim lukom i žicom. Diplomski rad sastoji se od teorijskog i praktičnog dijela. U teorijskom dijelu ukratko je opisana aditivna proizvodnja električnim lukom i žicom te su navedene glavne prednosti i ograničenja te proizvodnje. Objašnjena je tehnika aktivnog hlađenja i toplinski ciklus kod aditivne proizvodnje električnim lukom i žicom. U drugom poglavlju detaljno je obrađen AC MIG postupak s posebnim naglaskom na dinamičku karakteristiku procesa i opremu. Također, navedeni su utjecajni parametri i primjenjivi materijali AC MIG postupka zavarivanja.
U praktičnom dijelu izrađeni su uzorci aditivnom proizvodnjom električnim lukom i žicom pomoću AC MIG i DC Pulse postupka uz praćenje i kontrolu toplinskog ciklusa. Provedena je optimizacija parametara zavarivanja za izradu uzoraka aditivnom proizvodnjom električnim lukom i žicom od dupleks čelika. Snimanjem i analizom dinamičke karakteristike ocijenjena je stabilnost procesa. Utvrđen je utjecaj tehnike aktivnog hlađenja na geometriju, homogenost i mehanička svojstva proizvedenih uzoraka. Pored toga, prikazan je doprinos tehnike aktivnog hlađenja u poboljšanju aditivne proizvodnje električnim lukom i žicom.

Abstract (english)

The topic of this thesis is application of active cooling technique during wire and arc additive manufacturing. The paper consists of a theoretical and experimental part.
In theoretical part is briefly described wire and arc additive manufacturing with its main advantages and limitations. Active cooling technique and thermal cycle during wire and arc additive manufacturing are described. In the second chapter, AC MIG welding process is detailed explained with special emphasis on voltage and current waveform and equipment for this process. Also, influence welding parameters and applicable materials for AC MIG process are specified.
In experimental part, samples are fabricated by wire and arc additive manufacturing using AC MIG and DC Pulse welding processes. Optimization of wire and arc additive manufacturing parameters for fabrication samples of duplex stainless steel is conducted. Process stability is assessed by recording and analysing voltage and current waveform. Impact of active cooling technique on geometric properties, homogeneity and mechanical properties is observed. Additionaly, contribution of active cooling technique on improvement of wire and arc additive manufacturing is shown.

• Keywords: aditivna proizvodnja električnim lukom i žicom; tehnika aktivnog hlađenja; AC MIG; dupleks čelik
• Keywords (english): wire and arc additive manufacturing; active cooling technique; AC MIG; duplex steel
• Language: croatian
• URN:NBN: urn:nbn:hr:235:977017
• Study programme: Title: Mechanical Engineering; Study programme type: university; Study level: graduate; Academic / professional title: magistar/magistra inženjer/inženjerka strojarstva (magistar/magistra inženjer/inženjerka strojarstva)
• Type of resource: Text
• File origin: Born digital
• Access conditions: Open access
• Created on: 2022-07-09 05:35:15