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Machine Elements II

Course developer

Prior knowledge

LauZ3126, Strength of Materials I

LauZ3162, Strength of Materials II

LauZ4190, Theoretical Mechanics II

MašZ3016, Machine Elements I

Meha4008, Theoretical Mechanics I

Course abstract

The aim of the study course is to acquire the theory of general (typical) machine elements (part and units), engineering calculations and design, present engineering knowledge for creative machine design work, develop engineering thinking, initiative and creation, to apply the existing ideas and to search for new ones, to modulate using analogues.

Learning outcomes and their assessment

Knowledge - know the criteria for workability of machines, machines and parts, selection of materials and design methods, knowledge of the design-related standards (ISO, LVS, DIN) - exam.
Skills - how to choose a technical method to address tasks, use manuals and standards for practical tasks - 1 laboratory work task.

Competence - capable of modulating tasks in machine science, addressing technical tasks and conducting independent studies, is a knowledgeable, informed and capable professional – 5 practical work tasks.

Course Content(Calendar)

1. Gear drive types (Lecture – 2h)
2. Selection of gear material (Lecture 1h)
3. Calculation of gear train (Lecture – 1h, Practical Work 2h)
4. Calculation of gear (Lecture – 1h, Practical Work 2h)
5. Shaft connections (Lecture – 2h)
6. Calculation of shaft connections (Lecture – 1h, Practical Work 2h)
7. Couplings, clutches, and brakes (Lecture – 2h, Practical Work 2h)
8. Shaft alignment (Lecture – 1h, Lab work 2h)
9. Agriculture machinery liftime calculation (Lecture – 1h)
10. Thread types (Lecture – 2h)
11. Threaded connection calculation (Lecture – 2h, Practical Work 2h)
12. Woodchippers (Lecture – 1h)
13. Hammer mills (Lecture – 1h)
14. Transfer mechanisms (Lecture – 1h)

15. Stone pickers (Lecture – 1h) Exam

Requirements for awarding credit points

Course assessment is formed follows:
• all practical work tasks must be submitted and graded (30%);
• lab task must be submitted and graded (20%);
• exam must be written and successfully graded (50%).

Credit points are assigned if the rate weighted average score is at least grade 4.

Description of the organization and tasks of students’ independent work

Students must independently solve five practical work tasks, as well as perform calculations for the successful execution of laboratory work. Students prepare themselves for the exam on the subject of lectures.

Criteria for Evaluating Learning Outcomes

The mark is formed as the weighted mean of the results of practical work tasks, lab task and the exam.

Compulsory reading

Budynas R., Nisbett K. Shigley's Mechanical Engineering Design, 10th edition. Singapore etc.: McGraw-Hill, 2014. 1104 p.

Further reading

1. Uzkliņģis G. Mašīnu elementi. 1.daļa: Savienojumi. Jelgava: LLU, 2008. 468 lpp.

2. Fischer U., Gomeringer R., Heinzler M., Kilgus R. Mechanical and Metal Trades Handbook, 3rd edition. Europa-Lehrmittel, 2012. 444 p.

Periodicals and other sources

1. Mašīnzinību informācijas portāls, tiešsaiste: http://machinedesign.com/

Notes

Compulsory course for students of the professional higher education study program "Machine Design and Manufacturing". 3rd study year 6th semester.