Utjecaj brzine deformiranja na krivulju tečenja kod procesa sabijanja u hladnom stanju

master's thesis

• Title (english): Impact of deformation rate on material flow curve in cold forming processes
• Author: Ivan Mitrović
• Mentor: Petar Piljek (mentor)
• Granter: University of Zagreb; Faculty of Mechanical Engineering and Naval Architecture; Zagreb
• Defense date and country: 2023-01-27, Croatia
• Scientific / art field, discipline and subdiscipline: TECHNICAL SCIENCES; Mechanical Engineering; Production Mechanical Engineering

Abstract

Kovanje je jedan od najstarijih zanata poznatih čovjeku. Zahvaljujući njegovom razvoju razvijen
je značajan broj grana gospodarstva, ali se napredovalo i na području ratovanja i osvajanja
teritorija. Prema tome, predmet istraživanja ovog rada je utjecaj brzine deformiranja na krivulje
tečenja kod procesa sabijanja u hladnom stanju. Uz pomoć analizirane literature te primjenom
stečenog znanja opisan je proces i vrste kovanja, zajedno sa strojevima pomoću kojih se kovanje
izvodi te osnovni pojmovi koji se vezuju uz krivulju tečenja kao svojstvo materijala koje se
ostvaruje u procesu deformacije materijala. Krivulja tečenja povezuje naprezanje sa stupnjem
deformacije materijala. Praktični dio rada prikazuje eksperiment koji je uključivao valjčiće koji su
sabijani različitim brzinama uz pomoć gravitacijskog bata te hidraulične preše. Ostvareni rezultati
prikazani su analizirani matematičkim izračunima te prikazani grafički, a temeljem istih doneseni
su i određeni zaključci.

Abstract (english)

Forging is one of the oldest crafts known to man. Thanks to its development, a significant number of branches of the economy were developed, but progress was also made in the field of warfare and conquest of territory. Therefore, the subject of research in this paper is the influence of the deformation rate on the flow curves during the cold upsetting process. With the help of the analyzed literature and the application of the acquired knowledge, the process and types of forging are described, along with the machines that are used to forge, and the basic concepts related to the flow curve in the deformation process. The practical part of the work shows an experiment that included billets that were compressed at different deformation rates with the help of a gravity drop hammer and a hydraulic press. The obtained results are analyzed with mathematical calculations and presented graphically, and certain conclusions are drawn based on them.

• Keywords: Kovanje; krivulja tečenja; brzina deformiranja; oblikovanje deformiranjem
• Keywords (english): forging; yield curve; deformation rate; forming process
• Language: croatian
• URN:NBN: urn:nbn:hr:235:969678
• Study programme: Title: Mechanical Engineering; specializations in: Design, Process and Energy Engineering, Production Engineering, Engineering Modelling and Computer Simulation, Marine Engineering, Industrial Engineering and Management, Materials Engineering, Mechatronics and Robotics, Autonomous Systems; Course: Production 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: 2023-01-18 22:54:29