ID: 1540
Course type: theoretical and methodological
Course coordinator: Gnjatović B. Nebojša
Lecturers: Gnjatović B. Nebojša
Contact: Gnjatović B. Nebojša
Level of studies: M.Sc. (graduate) Academic Studies – Mechanical Engineering
ECTS: 6
Final exam type: written
Department: Department of Material Handling, Constructions and Logistics
Basic course goals (objectives): 1) introducing students to specificity of working process, construction, design and calculation of fundamental subsystems of construction and mining machines; 2) mastering practical skills which are necessary for design and calculation of construction and mining machines.
This course offers the following skill set to the students who complete it: • Design of backhoe excavators’ working devices; • Design of basic elements of single-bucket excavators’ working devices; • Modeling and calculation of a bucket wheel excavator’s working device – bucket wheel body and buckets; • Design and calculation of the bucket wheel drive system; • Design and calculation of four and eight-wheel bogie of a crawler mechanism; • Calculation of basic technical and technological parameters, power and strength of jaw and conic rock crushers; • Load analysis, modeling, proper supporting, loading and finite element analysis of civil and mining machines’ fundamental subassemblies.
Short survey of construction and mining machines development. Shovel excavators. Calculation of working loads caused by soil excavation. Calculation of basic geometrical parameters of bucket of back hoe excavator, power shovel and dragline excavator. Defining parameters of drive and transmission system of working device of shovel excavator. Design solutions of elements of working device of shovel excavator. Shovel excavator’s working device strength calculation. Design and calculation of dozer, scraper and grader mechanisms. Multi bucket excavators. Basic design of bucket wheel excavator. Bucket wheel excavator working device. Bucket wheel, buckets. Bucket wheel drive. Determination of bucket wheel boom basic parameters. Bucket chain excavator. Basic design of bucket chain excavator. Working device of bucket chain excavator. Theoretical fundaments of crushing process. Jaw, cone, roll and impact crushers – design, calculation. Theoretical fundaments of screening process. Static and dynamic screens - design, calculation.
Design of back hoe excavator working device. Shaping of working device basic elements. Selection of hydro cylinder. Design of basic elements of shovel excavator working device. Design and calculation of dozer working device. Design and calculation of bucket wheel excavator working device. Design and calculation of bucket wheel with buckets. Design, construction and calculation of bucket wheel drive. Design and calculation of four wheel and eight wheel bogie of bucket wheel excavator crawler travel gear. Calculation of basic technical-technological parameters, power and strength of jaw and cone crushers. Construction documentation. Consultations.
Engineering Graphics, Strength of Materials, Material Science, Machine Elements 1, Machine Elements 2, Fundamentals of steel structures
Srđan Bošnjak, Handouts, University of Belgrade, Faculty of Mechanical Engineering, Belgrade.
Total assigned hours: 75
New material: 20
Elaboration and examples (recapitulation): 10
Auditory exercises: 0
Laboratory exercises: 15
Calculation tasks: 5
Seminar paper: 0
Project: 10
Consultations: 0
Discussion/workshop: 0
Research study work: 0
Review and grading of calculation tasks: 0
Review and grading of lab reports: 0
Review and grading of seminar papers: 0
Review and grading of the project: 5
Test: 5
Test: 0
Final exam: 5
Activity during lectures: 10
Test/test: 20
Laboratory practice: 20
Calculation tasks: 0
Seminar paper: 0
Project: 20
Final exam: 30
Requirement for taking the exam (required number of points): 35
Momir M. Plavšić, Construction Machines, Scientific Book, Belgrade, 1990.; Vinko Jevtić - Construction and Mining Machines, Faculty of Mechanical Engineering Nis, 1993.; Srđan Bošnjak, Bucket Wheel Trenchers, University of Belgrade, Faculty of Mechanical Engineering, Belgrade, 2001.