Assembly Technology

• Dizajn u mašinstvu, Semester 3, position 4
• Production Engineering, Semester 3, position 4
• Inženjerska grafika i mehatronika, Semester 3, position 4

1. Learning of systematic approach to the design and production of mechanical assemblies; 2. Understanding assembly process and basic assembly operations; 3. Impact of assembly process on product development – product structure and Design For Assembly techniques; 4. Part mating process, modeling and understanding relationships between precision, sensitivity and flexibility; 5. Basic concepts of assembly systems – manual, automatic and robotic systems; Assembly system design; Assembly workstation design issues; 6. Performance and Economics of Assembly Systems; 7. Product lifecycle and product disassembly.

After successfully completing course, student is capable to: 1. Analyze assembly and carry out its optimal sequencing into basic assembly operations for the given set of criteria; 2. Design a system for automatic assembly that includes parts feeding, orientation, separation and geometry control; 3. Design systems for manual assembly with all sub-systems including sequencing; 4. Design systems for automatic and robotized assembly including work stations, as well as peripherals for parts feeding; 5. Optimize assembly design with respect to its assemblability using qualitative and quantitative Design for Assembly techniques

Theoretical background of industrial assembly systems is given through 10 lectures + introductory lecture: 0. What is industrial assembly and its role in production systems, 1. Assembly system structure and assembly process, 2. Part mating theory of compliantly supported rigid parts, 3. Joining techniques and processes, 4. Feeding and material flow in assembly system, 5. Assembly structure, sequencing and Design For Assembly, 6. Manual assembly systems, 7. Automatic assembly systems – rigid transfer lines, 8. Automatic assembly systems – flexible assembly lines and robotic assembly cells, 9. Performance and Economics of Assembly Systems, and 10. Product lifecycle and disassembly technology.

Practical training is organized through laboratory exercises and project (team work) of assembly system design for selected product. LAB 1: Quasi-static part mating – demonstration of passive compliant device RCC, demonstration of 6 DOF force/torque sensor, force sensor calibration, robot motion programming, measurement of part mating forces and identification of contact situations, comparison of experimentally evaluated results with theory. LAB 2: Passive systems for feeding and orienting – vibratory bowl feeder and linear feeding tracks demonstration, part geometry analysis and identification of basic natural resting states, design and obstacles optimization of passive orienting system for selected class of headed cylindrical parts, tuning the system, measurement and efficiency estimation of configured orienting system, estimating of mean feeding capacity. LAB 3: Vision systems for part feeding - demonstration of vision system configuration and its use in part feeding, image analysis and identification of paths contours and its locations, identification of system performances and optimization. Project covers the following topics: 1. Assembly design and product design for assembly (DFA), 2. Parts presenting systems - orientation, separation and positioning task, 3. Working heads for part mating, part joining and other assembly operations, and 4. Transfer systems - assembly conveying, manipulation operations, line balancing and control.

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1. Jakovljević Ž., Petrović P. B., Contact states recognition in robotized assembly, FME, Belgrade 2011 /In Serbian/ 2. Jakovljević Ž., Assembly technology - Handouts, FME, Belgrade, 2024 3. Robotic cell equipped with sensory and acquisition system for demonstration of compliant part mating and RCC working principle; 4. Experimental system based on linear vibratory conveyor for demonstration and students training in design of passive part presenting systems; 5. Vision system for demonstration and students training in designing of flexible robotic part presentation systems;

Total assigned hours: 75

New material: 20
Elaboration and examples (recapitulation): 10

Auditory exercises: 6
Laboratory exercises: 12
Calculation tasks: 0
Seminar paper: 0
Project: 12
Consultations: 0
Discussion/workshop: 0
Research study work: 0

Review and grading of calculation tasks: 0
Review and grading of lab reports: 2
Review and grading of seminar papers: 0
Review and grading of the project: 2
Test: 0
Test: 6
Final exam: 5

Activity during lectures: 10
Test/test: 30
Laboratory practice: 10
Calculation tasks: 0
Seminar paper: 0
Project: 20
Final exam: 30
Requirement for taking the exam (required number of points): 30

Ćosić., I., Assembly Systems, IP Nauka, Beograd, 1991, ISBN: 86-7621-045-4. /In Serbian/; Boothroyd, G. 1983. Design for Assembly Handbook, Design project, Dep. Of Mechanical Eng., University of Massachusetts, Amherst, Massachusetts, USA. ; Bothroyd, G., Poli, C. and Murch, L. E. 1982. Automatic Assembly, Marcel Dekker Inc., New York, USA, ISBN 0-8427-1531-4. ; Whitney, E., D., Mechanical Assemblies: their Design, Manufacture, and Role in Product Development, Massachusetts Inst. of Techn, New York Oxford, OXFORD UNI PRESS, 2004, ISBN 0-19-515782-6; Groover, M., Automation, Production Systems and Computer Integrated Manufacturing, Prentice-Hall, Inc. 1987.