Optimiranje parametara aktivnog hlađenja kod aditivne proizvodnje električnim likom i žicom

master's thesis

• Author: Jurica Vresk
• Mentor: Ivica Garašić (mentor)
• Granter: University of Zagreb; Faculty of Mechanical Engineering and Naval Architecture; Zagreb
• Defense date and country: 2021-12-16, Croatia
• Scientific / art field, discipline and subdiscipline: TECHNICAL SCIENCES; Mechanical Engineering; Production Mechanical Engineering

Abstract

U teorijskom dijelu, uz aditivnu proizvodnju električnim lukom i žicom, predstavljani su
različiti pristupi upravljanju toplinom u svrhu smanjivanja unosa topline i manje akumulacije
topline tijekom procesa taloženja. Uz prirodni pristup hlađenja, obrađeni su i intrinzični princip
upravljanja toplinom, aktivni i pasivni način hlađenja predforme tokom taloženja. Opisan je i
konstrukcijski čelik S355 i njegova svojstva zbog korištenja istog u eksperimentalnom dijelu
rada.
Eksperimentalni dio rada prikazuje proces aditivne proizvodnje električnim lukom i žicom uz
dva različita pristupa upravljanju toplinom. Jedna se predforma prirodno hladi dok je druga
predforma podvrgnuta aktivnom hlađenju, puno intenzivnijem obliku od prirodnog. Fokus
eksperimentalnog dijela rada je na usporedbi razlike mehaničkih svojstava predformi taloženih
u različitim uvjetima hlađenja. Iz predforme su izvađeni uzorci iz kojih su izvađeni
makroizbrusci, na kojima je mjerena tvrdoća, ispitivana udarna radnja loma i sniman rendgen.

Abstract (english)

In the theoretical part of the thesis, in addition to WAAM, different approaches to heat management are presented in order to reduce heat input and heat accumulation during the deposition process. In addition to the natural approach to cooling, the intrinsic principle of heat management, the active and passive way of cooling the preform during deposition are also discussed. The structural steel S355 and its properties due to its use in the experimental part of the paper are also described. The experimental part of the thesis presents the process of WAAM with two different approaches to heat management. One preform cools naturally while the other preform is subjected to active cooling, a much more intense form of cooling than natural. The focus of the experimental part of the thesis is on comparing the differences in the mechanical properties of preforms deposited in different cooling conditions. On samples taken from the preform was measured hardness, the impact fracture was examinated and an X-ray taken.

• Keywords: Aditivna proizvodnja električnim lukom i žicom; upravljanje toplinom; prirodno hlađenje; aktivno hlađenje; predforma
• Keywords (english): Wire and Arch Additive Manufacturing – WAAM; heat management; natural cooling; active cooling; preform
• Language: croatian
• URN:NBN: urn:nbn:hr:235:000764
• 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: 2021-12-02 06:57:24