MECHANICAL ENGINEERING DESIGN (CCE)

SHE Level 3
SCQF Credit Points 20.00
ECTS Credit Points 10.00
Module Code M3H324724
Module Leader Martin MacDonald
School School of Computing, Engineering and Built Environment
Subject SCEBE - School Office
Trimesters
  • A (September start)
  • B (January start)

Summary of Content

To learn concepts of the design process and its application to the design of system components, sub-assemblies and assemblies. In specific, to design machine elements such as shafts, gears, bearings, clutches, belt drives, brakes and springs. Design of bolt and weld connection systems confirming to BS. Application of learned concepts to design and develop a simple prototype.

Syllabus

The teaching syllabus will cover the following areas: Design Process: Introduction to the Design Process for the solution of engineering systems and components. Design specifications. Design protection. Safety and economy of design, fail-safe principles, influence of strength/weight ratio. Aesthetic and ergonomic factors. Design of shaft: Design of solid and hollow shaft considering bending, torsion, axial and combined loading. Power Transmission System Design: Gear systems - terminology; British Standards; basic gear geometry; design rules for spur, single-helical, bevel and epicyclic gears; transmission of gear tooth forces and resultant forces at shaft bearings; gear tooth stresses based on the Lewis formulae; typical gear/shaft assemblies; methods of locating and securing gears on shafts. Design of clutches, belt drives, brake systems and power screws. Design of Bearings: General overview of bearing types; parameters involved in design and selection of ball and roller bearings; lubrication and seals; assembling and securing bearings on shafts; selection of ball/roller bearings using manufacturer's data/catalogues. Design of Connection Systems: Bolt and weld design - terminology, BS5950 design requirements; types of bolts and welds; applications; application of bolt and weld systems in various loading conditions. Design of Spring Systems: Design and select appropriate springs for specified applications.

Learning Outcomes

On completion of this module the student should be able to:1. Apply the formal design process to the design of simple engineering systems. (AM1, AM5)2. Design of shaft considering bending, torsion, axial and combined loading. (AM1, AM5)3. Design the power transmission gears and solve design problems related to gear tooth force, generated in shaft supported bearings. (AM1, AM5)4. Select rolling-element bearings from manufacturer's catalogues for various applications. (AM1, AM5)5. Design the connections between component parts using bolts and welds to BS 5950. (AM1, AM5)6. Design of springs, clutches, belt drives, brake and power screw systems for given applications (AM1, AM5).7. Design of a specific practical application utilizing few of the above machine elements. (AM1, AM5)

Teaching / Learning Strategy

The material covered during lectures will be reinforced and consolidated through tutorials. Private study by students on relevant topics will form part of the learning process. Tutorials will be used to reinforce the module material discussed during lecture sessions. Tutorials also serve as a platform of technical discussions to clarify any queries that arise from directed studies.

Indicative Reading

Recommended texts: Robert L. Norton,1998, Machine Design - An Integrated Approach , , Prentice-Hall.. Juvinall, Marshek, 2000, Fundamentals of Machine Component Design , 3 rd Ed., John Wiley & Sons. Peter R.N. Childs, 2004, Mechanical Design , 2 nd Ed., Elsevier Butterworth-Heinemann. J.E. Shigley ,1986, , Mechanical Engineering Design , McGraw-Hill. G.K. Vijayaraghavan, & S. Vishnupriyan, 2010, Design of Machine Elements , Lakshmi Publications, Chennai, India,

Transferrable Skills

Integrating and implementing the concepts learned from this module for designing and building a prototype for a particular practical application, writing design report.

Module Structure

Activity Total Hours
Tutorials (FT) 28.00
Assessment (FT) 16.00
Independent Learning (FT) 100.00
Lectures (FT) 56.00

Assessment Methods

Component Duration Weighting Threshold Description
Coursework 1 n/a 30.00 35% Lab Report 2000 words and Lab test linked
Exam (Exams Office) 3.00 50.00 45% Final Examination - Unseen written examination-3 Hours
Exam (School) 1.50 20.00 35% Mid-term Test - Unseen written examination-1½ Hours