Course detail

Machine Design - Mechanical Drives

FSI-6KT-AAcad. year: 2017/2018

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.

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.

Recommended optional programme components

Not applicable.

Recommended or required reading

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.
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.

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. The student is required to prepare himself for the seminars in accordance with the time schedule published on the BUT e-learning. Teachers individually discuss solution process with each student during seminars and make assessment of the student work in each seminar (ie. preparedness to discussion, accomplishment of the project key checkpoints, etc.). The assessment score shall be counted in the overall score from seminars.

2. Elaboration and submission of semestral project on schedule set by the teacher. The complete project consists of: a) calculation report, b) assembly drawing c) drawing documentation of machine parts selected by teacher. Overall quality of submitted outcomes is subject of assessment.

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 consists of twelve theoretical questions, scores 1 point each. Second part of the test consists of twelve computational questions, scores 4 points each. 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.

Language of instruction

English

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

Lectures:
Attendance at lectures is recommended. Provided lectures are based on Mechanical engineering design textbook which is basic material for study and preparation to final exam. The lectures refers to the specific pages in the textbook that are related to the discussed topics and are accompanied by information on the current state of knowledge. Lectures are available as the electronic previews in the Moodle system.
Seminars:
Attendance at seminars is required - a maximum of two excused absences per semester are tolerated. The tutorials take form of individual semestral project. The goal of the project is to design a single-stage gearbox or planetary gearbox with the following design arrangement:
Single-stage gearbox with spur gears.
Single-stage gearbox with straight bevel gears.
Planetary gearbox with spur gears.
Students individually solve the projects selected by the teacher. Students must work in accordance to the time schedule published in the Moodle system. Students are required to maintain the design documentation of the project, which is discussed through the seminars. Form of the documentation is given by the teacher (writing in a workbook, electronic, etc.). Finally, the students draw the technical drawings (design assembly and parts according teacher selection). It is possible to use both private notebooks and computers in the classroom (WiFi available) during tutorials. The Mathcad software is recommended and preferred for elaboration of semestral projects, alternatively other applications are allowed, like MS Office Excel, etc.

Classification of course in study plans

  • Programme B3A-P Bachelor's

    branch B-MET , 3. year of study, summer semester, 4 credits, compulsory-optional

  • Programme B3S-P Bachelor's

    branch B-STI , 3. year of study, summer semester, 4 credits, compulsory-optional
    branch B-SSZ , 3. year of study, summer semester, 4 credits, compulsory-optional

Type of course unit

 

Lecture

26 hours, 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.

seminars in computer labs

26 hours, compulsory

Teacher / Lecturer

Syllabus

1.-13. Solving of the semestral project according to the teacher selction.

eLearning

eLearning: opened course