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Title:Vpliv plamenskega ravnanja na nosilnost teleskopskih ročic
Authors:ID Slana, Danilo (Author)
ID Gubeljak, Nenad (Mentor) More about this mentor... New window
ID Predan, Jožef (Comentor)
Files:.pdf MAG_Slana_Danilo_2016.pdf (6,52 MB)
MD5: 37A1BCE8212303ABF0F300056549AEEB
 
Language:Slovenian
Work type:Master's thesis
Typology:2.09 - Master's Thesis
Organization:FS - Faculty of Mechanical Engineering
Abstract:Teleskopske ročice so zvarjenci, izdelani iz modernih nizkolegiranih visokotrdnostnih finozrnatih jekel. Kot vsi zvarjenci so podvrženi deformacijam zaradi varjenja. Deformacije je treba zmanjšati in med najpomembnejše tehnično in ekonomsko sprejemljive postopke za ravnanje štejemo plamensko ravnanje. Pri plamenskem ravnanju s pomočjo mehanskih vpetij in lokalnega vnašanja toplote s plamenom povzročamo lokalno plastično deformacijo materiala in s tem spreminjamo obliko in velikost obdelovanca. Ker je material S700MC, iz katerega so izdelane teleskopske ročice, občutljiv na vnose toplote, je bil v nalogi raziskan vpliv plamenskega ravnanja na nosilnost tega elementa. Zbrani so bili podatki iz literature in izvedeni preskusi udarne žilavosti in natezne trdnosti. Z metodo končnih elementov so bile ponazorjene deformacije in obnašanje materiala v vroči točki in okolici. Naloga pokaže, da lahko plamensko ravnanje uspešno izvajamo brez vpliva na nosilnost, treba pa je uporabljati nižje temperature, kot smo jih vajeni iz ravnanja konstrukcijskih jekel nižje natezne trdnosti. Naloga tudi pokaže, da je potrebno pripraviti in slediti prilagojenim navodilom za izvedbo plamenskega ravnanja za različne vrste jekla.
Keywords:ANSYS, deformacije pri plamenskem ravnanju, finozrnata jekla – HSLA, optimizacija in izboljšave v procesu plamenskega ravnanja, plamensko ravnanje, S700MC, temperatura Ac1 za S700MC, termomehansko valjana jekla, vroče točke pri plamenskem ravnanju
Place of publishing:Maribor
Publisher:[D. Slana]
Year of publishing:2016
PID:20.500.12556/DKUM-59182 New window
UDC:620.178.6:621.791.053(043.2)
COBISS.SI-ID:19742230 New window
NUK URN:URN:SI:UM:DK:I9XVZ74G
Publication date in DKUM:08.06.2016
Views:2172
Downloads:295
Metadata:XML DC-XML DC-RDF
Categories:KTFMB - FS
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Secondary language

Language:English
Title:Influence of flame straightening on load capacity of telescopic booms
Abstract:Boom arms are welded out of modern high-strength low-alloy fine grained steel. Like all welded structures, they are also subjected to welding deformation which has to be reduced. Flame straightening is one of the technically and economically most acceptable procedures for reducing welding deformations. With this process, local plastic deformations are caused by means of mechanical fixtures and local heat input, thus changing the material in shape and size. As the material S700MC, which the boom arms are made out of, is sensitive to heat input, flame straightening influence on the load capacity of boom arms was researched. Available information was gathered and the Charpy impact test was conducted along with tensile testing. The finite elements method was used to illustrate the behavior of the material at hot spot and in the surrounding area. The study has shown that flame straightening can successfully be performed with no impact on the load capacity of the element, however at lower temperatures as usually used for construction steels of lower tensile strength. The study has also shown that customized procedures for different steel types have to be prepared and followed.
Keywords:ANSYS, flame straightening deformation, fine grained steel – HSLA, flame straightening, high-strength low-alloy steel, hot spots in flame straightening, optimization and improvement of flame straightening process, S700MC, temperature Ac1 for S700MC, thermomechanically rolled steels


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