Machine design

Teacher(s)

Raucent Benoît; Servais Thomas (compensates Raucent Benoît);

Language

English

Prerequisites

This course is taught in the first year of the master MECA and ELME mechatronics. It assumes that students already have basic skills in technical drawing. The aim of the course is to introduce the elementary knowledge necessary for the mechanical design of the elements that compose a machine. It is thus the basic course before a specialization 'design and manufacturing' and will contribute to prepare students to a future job as R&D engineer in the technical department of a company.

Main themes

Functional analysis of machines and their components
Properties of component
Elements of calculus of machine components.

Learning outcomes

At the end of this learning unit, the student is able to :
1	Specific learning outcomes of the course ·         Write  functional specifications for a machine ·         Identify the functionalities of a machine (actuation, bearing systems, transmission, sealing, ') ·         Estimate the installed and maximum power, the energetic consumption and the efficiency of a machine ·         Design a simple machine following an adapted methodology ·         Identify the basic hypotheses of elements dimensioning ·         Dimensioning  following  various  criteria  (yield  strength,  elastic  compliance,  fatigue)  of  usual elements (e.g. shafts) ·         Dimensioning while taking into account the effect of dynamic loading, stress concentration and residual stresses ·         Choose machine components (bearing, gasket, transmission) Read and interpret the drawing of an existing machine ·         Hand drawing of machine components and overall drawings ·         Placing tolerances for a mechanical system ·         Machine component design : threaded fastener and power screws, rivet and welding rolling bearing, sliding bearings,  clutches and brakes, power transmssion components (gears, belt, chains,  etc..), shaft and assocated part (key, pin, coupling, ') In consideration of the reference table AA of the program " Master's degree civil engineer mechanics ", this course contributes to the development, to the acquisition and to the evaluation of the following experiences of learning: AA1.1, AA1.2 AA2.1, AA2.2, AA2.3, AA2.4, AA2.5, AA2.6, AA2.7, AA2.8 AA4.3, AA4.4 AA5.1

Content

At the end of the course the students will be able to :

1. Write  functional specifications for a machine
2. Identify the functionalities of a machine (actuation, bearing systems, transmission, sealing, …)  
3. Estimate the installed and maximum power, the energetic consumption and the efficiency of a machine
4. Design a simple machine following an adapted methodology
5. Take into account environmental, social, and economic impacts from the initial phase of design through to the end of life (sustainable design)
6. Identify the basic hypothesis of elements dimensioning
7. Choose materials and their shape as a function of the service conditions and the conditions of failure
8. Dimensioning following various criteria (static strength, elastic deformation, fatigue, …) of usual elements (e.g. shafts)
9. Choose machine components (bearing, gasket, transmission, brake, clutch, hydraulic, spring)
10. Read and interpret the drawing of an existing machine
11. Hand drawing machine elements and overall drawings
12. Placing tolerances for a mechanical system
13. Conducting a risk analysis
14. Take into account in the design process of digital manufacturing technologies

Teaching methods

Part of the course is taught as lectures and by problem and project based learning (PBL) within groups of 6 students.  Two projects are proposed:

• Project 1 : design of a machine
• Project 2: Design for digital manufacturing

Evaluation methods

Students will be evaluated on the basis of the two projects and a written exercise exam. 

Both projects will be presented at the end of the semester. At the end of this presentation, a grade will be given and will be worth 3 points per project in the final grade. The note for the two projects are acquired once and for all (there is no second chance in septembre).

The written examination in session will be worth 14 points in the final grade. Students must score at least 7 out of 14 on the exam to receive credit for the entire course.
The written exam will be led only on-site (presence mode). It will contain exercises, theoretical questions and at least one drawing, the book Juvinall and the bearing catalogue are authorized, the book on technical drawing is not authorized.

Other information

All the information are given on Moodle

Bibliography

Suggested books (available at the BST library) :

Engineering Design Methods

N. Cross, ed. J. Wiley and Sons, 1991.
Materials Selection in Mechanical Design, M.F. Ashby, Butterworth-Heinemann.
This book is available on the web site of the BST library when connected to the UCL network, see:
http://www.sciencedirect.com/science/book/9781856176637
Aide Mémoire de l’ELEVE Dessinateur et du Dessinateur Industriel
M. Norbert et R. Philippe, La Capitelle, Casteilla, 1987.
Roulements FAG, roulements à billes, roulements à rouleaux, paliers, accessoires, catalogues WL 41 520 FA.
Mémotech, productique, conception et dessin, C. Barbier et R. Bourgeois, collection A. Capliez, Educative, ed. Casteilla, 1988.
Méthode Active de Dessin Technique, A Ricordeau, C. Corbet, C. Hazard, ed Casteilla (Ce livre est également obligatoire pour le cours LMECA_1210 et le cours de LFSA_1501).
Materials - Engineering, Science, Processing and Design, M. Ashby, H. Shercliff, D. Cebon, Butterworth-Heinemann.

Teaching materials

• MECA1821 – Machine Design, Specifications and pilot study (ch 1 to 3), B. Raucent
• Fundamentals of Machine Component Design R.C. Juvinall & K.M. Marshek, éd. J. Wiley and Sons
• Engineering Design Methods N. Cross, ed. J. Wiley and Sons, 1991.
• Méthode Active de Dessin Technique, A Ricordeau, C. Corbet, C. Hazard, ed Casteilla

Faculty or entity

MECA