Analiza zaostalih napetosti med procesom izdelave teleskopske roke

magistrsko delo

Janez Mlinarič (Author), Tomaž Vuherer (Mentor)

Abstract

V magistrski nalogi smo analizirali zaostale napetosti med procesom izdelave teleskopske roke. Zaostale napetosti v materialu se pogosto pojavijo kot posledica preoblikovalnih procesov, ki povzročijo plastično deformacijo materiala ali vnos toplote vanj. So zelo nezaželene zaradi možnega padca nosilnosti in drugih težav. Spremljali smo vrednosti in porazdelitev zaostalih napetosti na dveh enakih delih teleskopskih rok, narejenih iz plošč različnih šarž. Zaostale napetosti smo spremljali v štirih fazah – pred obdelovalnimi procesi, po laserskem izrezu, upogibu in varjenju. Zaostale napetosti smo merili s pomočjo magnetne metode z napravo SMMT-1. Nadaljnjo obdelavo signalov smo izvedli v Excelu in rezultate prikazali s prostorskimi grafi, ki smo jih primerjali med sabo. Odkrili smo razlike med polji zaostalih napetosti v vseh meritvenih fazah, največje so bile po upogibanju.

Keywords

zaostale napetosti;teleskopska roka;analiza;magnetna metoda;merjenje;magistrske naloge;

Data

Language:	Slovenian
Year of publishing:	2021
Typology:	2.09 - Master's Thesis
Organization:	UM FS - Faculty of Mechanical Engineering
Publisher:	[J. Mlinarič]
UDC:	620.172.21:621.7.011(043.3)
COBISS:	62124547
Views:	374
Downloads:	60
Average score:	0 (0 votes)
Metadata:

Other data

Secondary language:	English
Secondary title:	Analysis of residual stresses during process of telescopic arm production
Secondary abstract:	In master thesis we focused on analysing residual stresses during process of telescopic arm production. Residual stresses in the material often occur due to transformation processes which cause plastic deformation or heat input to the material. They are undesirable since they may decrease load capacity or cause other problems. We monitored residual stress values and its distribution in two segments of telescopic arm. The segments were made from a shell plate with different batches. Residual stresses were observed during four phases - in base material before transformation, after laser cutting, bending, and welding. We measured residual stress with directional effective permeability method using SMMT-1. Measurements were processed in Excel and presented in 3D charts. We compared results between different plates. We found differences between fields of residual stresses in all measuring phases, the substantial difference was observed after bending.
Secondary keywords:	residual stresses;telescopic arm;analysis;directional effective permeability;measuring;
Type (COBISS):	Master's thesis/paper
Thesis comment:	Univ. v Mariboru, Fak. za strojništvo, Konstrukterstvo
Pages:	XI, 58 str.
ID:	12733465