• Semester 6, position 3

The aim of this course is to provide students with an introductory knowledge of the reparation of machine parts and construction, and the ability to solve concrete problems. This course is designed to provide information through theoretical lectures but also through laboratory type (practical) exercises, computational classes and seminar papers students are responsible for writing. Throughout this course students would also develop teamwork skills and the ability to combine knowledge from different areas of material and engineering sciences.

After fulfilling all the course requirements, as prescribed by the course plan, the student is capable of applying the acquired knowledge to: • Explain the importance of reparation of machine parts and construction in terms of sustainable development. • Describes and to distinguish between different types of damage of mechanical parts and construction • Select technology and process for machine parts and construction reparation on the basis of techno-economic and energy-ecological criteria. • Apply the mechanical and thermal processes for reparation of mechanical parts. • Propose repair welding technology for various types of damage. • Connect the acquired knowledge in this field with other areas and applies them in practice.

Introduction, importance and the domain or reparation application. Causes of damage and destruction of machine parts and constructions. Reparation technology. Reparation of gears, bearing and shafts. Reparation by repair welding i thermal spraying. Reparation of welded constructions. Reparation of axles. Tools reparation. Reparation of pressure vessels. Reparation of equipment and parts of thermoenegetical facilities. Equipment and reparation materials.

Damage and destruction of machine parts and constructions. Visual control and analysis of damaged areas. Prescription of the reparation technology. Homework assignments. Reparation technology of gears, rolling bearings and shafts. Lab exercises in machine shops devoted to repair welding and demonstration of reparation of an example machine part. Calculations of required material during repair welding. Reparation technology of welded constructions, tools, equipment under pressure and equipment and parts of thermoenergetical facilities.

Necessary conditions: Engineering materials 1, Engineering materials 2, Machine elements 1, Machine elements 2 and Basic of Welding.

1. A.Sedmak, V. Šijački Žeravčić, A. Milosavljević, V. Đorđević, M. Vukićević, Engineering materials, second part (in Serbian), Faculty of Mechanical Engineering, Belgrade, 2000, ISBN: 86-7083-366-2 2. V. Šijački Žeravčić, A. Milosavljević, A. Sedmak, Handbook of Engineering Materials – Welding, Brazing and Casting (in Serbian), Faculty of Mechanical Engineering, Belgrade, 1996, ISBN: 86-7083-275-5 3. Ognjanović M.: "Machine Elements", Faculty of Mechanical Engineering, Belgrade, 2021, ISBN: 978-86-6060-099-0 4. Plavšić N., Šijački-Žeravčić V., Stamenić Z.: Tables of Engineering Materials, Profiles, Sheets and Wires, Faculty of Mechanical Engineering, Belgrade, 2004, ISBN: 86-7083-397-2 5. Additional required materials (handouts, exercise examples etc.) are posted on the course web page or are given to the students in paper form. Other electronic course material can be provided directly to students attending the class. Lectures are realized using PowerPoint presentations and blackboard.

Total assigned hours: 75

New material: 30
Elaboration and examples (recapitulation): 0

Auditory exercises: 0
Laboratory exercises: 5
Calculation tasks: 10
Seminar paper: 10
Project: 0
Consultations: 0
Discussion/workshop: 5
Research study work: 0

Review and grading of calculation tasks: 2
Review and grading of lab reports: 1
Review and grading of seminar papers: 0
Review and grading of the project: 0
Test: 4
Test: 3
Final exam: 5

Activity during lectures: 5
Test/test: 35
Laboratory practice: 10
Calculation tasks: 5
Seminar paper: 15
Project: 0
Final exam: 30
Requirement for taking the exam (required number of points): 40

B. Sabo et al., Zavarljivost nerđajućih čelika-priručnik, N.Sad,1995; I. Hrivnjak, Zavarljivost čelika, Serbian translation (Lj. Nedeljković), Građevinska knjiga, Beograd, 1982; Krsmanović V., Mitrović R., Sliding and Rolling Bearings (in Serbian), Faculty of Mechanical Engineering, Belgrade, 2004; M.Ristivojević, Gears – Part 1: Kinematics and Control (in Serbian), Institute for Textbooks and Teaching Resources, Belgrade, 2005, ISBN: 86-17-12167-X; -