Federal Educational Agency

State higher educational establishment

«Saint-Petersburg State

Engineering and Economics University»

Department of engineering science and technologies

УТВЕРЖДАЮ

Проректор

по учебной работе

д.э.н., профессор

______________ О.В. Гончарук

«27» июня 2008 г.

Рег. № М 356

Основы проектирования и конструирования

Методические указания

к выполнению курсовой работы на тему

“Design engineering of parts of machine building related product”

Санкт-Петербург

2008

Допущено

редакционно-издательским советом СПбГИЭУ в качестве методического издания

Составители:

д-р техн. наук, проф. С.М. Галилеев

канд. техн. наук, доц. Л.В. Паршина

Рецензент

Подготовлено на кафедре инженерных наук и технологий

Одобрено научно-методическим советом специальности

Отпечатано в авторской редакции с оригинал-макета,

представленного составителями

 СПбГИЭУ, 2008

CONTENT

1.  GENERAL GUIDELINES 4

1.1. Objective and purposes of the coursework 4

1.2.  Content and scope of the coursework 4

1.3. Selection of task for the course work 5

2. GUIDELINES OF CALCULATION PORTION OF THE COURSE WORK 6

2.1. Electric-motor selection 6

2.2. Reduction unit kinematical and capacity calculations Error: Reference source not found

2.3. Toothed gear drive calculation 8

2.3.1. Assessment of permissible stresses 9

2.3.2. Designed calculation of helical gear 11

2.3.3. Test bending fatigue strength calculation 14

2.3.4. Reduction unit wheels layout method 16

2.4. Design-basis calculation of the shafts 19

2.5. Selection of rolling bearings 21

2.6. General recommendations for the design of reduction unit housing elements 29

2.7. Selection of tab 31

2.8. Test calculation of output shaft fatigue strength 32

3. GUIDELINES TO EXECUTION OF GRAPHIC PORTION OF THE COURSE WORK 36

4. . REQUIREMENTS TO COURSEWORK COMPLETION 43

5. . SUGGESTED READING 44

ATTACHMENT 1. Example of title sheet execution for explanatory note to the coursework 45

1. General guidelines

1.1. Objective and purposes of the coursework

Objective of the coursework is skills of practical application of knowledge to be gained by students, development of abilities to use reference literature and standards, familiarization with general rules and methods of machines and mechanisms design engineering.

Topic of the coursework – design engineering of parts of machine building related product. – single-step cylindrical reduction unit, including selection of electric motor, calculation of gearing, connections, selection of part and assembly units, ensuring gearing operation.

1.2. Content and scope of the coursework

The coursework shall be executed in the form of one booklet that contains explanatory note and graphic portion to be completed in the form of a drawing.

1.2.1. Explanatory note

Explanatory note shall be executed on A4 format sheets and must reflect the essence of the work being conducted. It shall contain the following:

• title sheet

• content;

• courseworkassignment;

• selection of electric motor;

• kinematical and capacity calculation of reduction unit

• calculation of toothed gearing;

• designed calculation of shafts;

• selection of rolling bearings;

• calculation of housing parts;

• calculation of tab connections;

• test calculation of output shaft fatigue strength;

• list of reference literature.