Course detail

Machine Design - Mechanical Drives

FSI-6KT-AKAcad. year: 2014/2015

The aim of the course is to provide an overview of machine parts used for power and rotary motion transmission, such as gears, shaft couplings, brakes and flywheels. Attention is paid especially to get understanding of their function and learn the methods used in their design process. The course integrates the knowledge acquired in theoretical courses of Mechanical Engineering Bachelor's degree programme, particularly in branches of materials science and mechanics.

Language of instruction

English

Number of ECTS credits

4

Mode of study

Not applicable.

Learning outcomes of the course unit

Knowledge of the principles of operation, design and application of the tooth gears and flexible transmission elements, shaft couplings, brakes and flywheels. Ability to apply gained knowledge to the design process of new machinery and equipment in creative way.

Prerequisites

Knowledge of design basics (drawing documentation), materials science (selection of materials), statics (load analysis), kinematics (kinematic analysis of mechanisms) and strength of materials (analysis of stress and deformation) at the level of Bachelor's degree programme aimed on mechanical engineering. Knowledge of mechanical engineering design is expected according to course Machine Design – Machine Elements (5KS).

Co-requisites

Not applicable.

Planned learning activities and teaching methods

The course is taught through lectures explaining the basic principles and theory of the discipline. Exercises are focused on practical topics presented in lectures.

Assesment methods and criteria linked to learning outcomes

Course credit requirements: The minimum number of points needed to obtain the course credit is 20 from 40 possible. Points can be obtained based on the following criteria:
1. Student activity in tutorials. Teachers discuss solutions with every member of the construction team during the semester. Every member of the team is responsible for different part of the project solution.
2. Elaboration and submission of semestral project on schedule set by the teacher. The complete project consists of: a) calculation report, b) drawing documentation of machine assembly, c) drawing documentation of machine parts selected by teacher.
3. The defense of semestral project through lecture, where every team member defends the topic which is responsible for. Lenght of the whole lecture is 10 minutes at maximum. If the student does not fulfill the requirements for the semestral project acceptance, he is entitled to have a maximum of one additional project defense. The date of defense is set by the teacher, usually during the examination period.
Final exam requirements: Multiple-choice test is performed on the computer and it utilizes the examination system of the Institute of Mechanical and Industrial Design. The test topics cover the problems mentioned in lectures and tutorials. Minimum score for passing the test is 30 out of 60 possible points. First part of the test (50%) consists of theoretical questions and second part (50%) consists of computational questions. The student has to pass the first (theoretical) part of the test to qualify himself to the second (computational) part. Each part of the final test is considered passed whether at least half of the questions are answered correctly. Each question has five answers, of which only one is correct. An incorrect answer does not mean negative point. A student card, pen and calculator are demanded to access the test room. The original print of the “Mechanical engineering design” textbook is allowed for the second part (computational) of the final test. Use of any other literature during the test is not allowed. The student which does not obtain the course credit is not allowed to attend the final exam.
The final score of the whole course consists of the total number of points earned from semestral project and multiple-choice test. The minimum required score is 50 points out of the maximum 100 points. The final score determines the grade according to ECTS.

Course curriculum

Not applicable.

Work placements

Not applicable.

Aims

The aim of the course is to provide an overview of machine parts used for power and rotary motion transmission, such as gears, shaft couplings, brakes and flywheels. Attention is paid especially to get understanding of their function and learn the methods used in their design process. The course integrates the knowledge acquired in theoretical courses of Mechanical Engineering Bachelor's degree programme, particularly in branches of materials science and mechanics.

Specification of controlled education, way of implementation and compensation for absences

Attendance at lectures is recommended, attendance at seminars is required - a maximum of two excused absences per semester are tolerated. Provided lectures are based on Mechanical engineering design textbook. During the lectures the teacher refers to the specific pages in the textbook that are related to the discussed topics. Lectures are available as the electronic previews in the Moodle system. Mentioned textbook is basic material for study and preparation to final exam. The tutorials take form of semestral project called “Design of gearmotor.” The project is investigated in teams. During first tutorial, students are divided into teams and each team may consist of up to three students. Student must have a Mechanical engineering design textbook at tutorial classes. It is possible to use both private notebooks and computers in the classroom (WiFi available) during tutorials. The Mathcad software is recommended for elaboration of semestral projects, alternatively other applications are allowed, like MS Office Excel, etc.

Recommended optional programme components

Not applicable.

Prerequisites and corequisites

Not applicable.

Basic literature

SHIGLEY, Joseph E., Charles R. MISCHKE a Richard G. BUDYNAS. Konstruování strojních součástí. 1. vyd. Editor Martin Hartl, Miloš Vlk. Brno: VUTIUM, 2010, 1159 s. ISBN 978-80-214-2629-0.

Recommended reading

BUDYNAS, Richard G. a Keith J. NISBETT. Shigley's mechanical engineering design. 9th ed. New York: McGraw-Hill, 2011. ISBN 978-0-07-352928-8
NORTON, Robert L. Machine design: An integrated approach. 4th ed. Boston: Prentice Hall, 2010. ISBN 01-361-2370-8.

Classification of course in study plans

  • Programme B2341-3 Bachelor's

    branch B-SSZ , 3 year of study, summer semester, compulsory-optional

Type of course unit

 

Guided consultation

17 hod., optionally

Teacher / Lecturer

Syllabus

1. Introduction to gearing. Types of gearings and terminology.
2. Basic theory of spur gears. Manufacturing and standardization of gears.
3. Spur and helical gears. Tooth gear mechanisms.
4. Tooth gear failures. Lubrication of gears. Calculation of bending stress. Calculation of contact stress.
5. Load capacity calculation of spur and helical gears according to ISO 6336.
6. Bevel gears.
7. Worm gear.
8. Belt drives. Timing belt drives.
9. Chain drives. Flexible shafts.
10. Wire rope drives. Friction drives.
11. Shaft couplings and brakes.
12. Flywheels.
13. Summary of subject matter.