Machine design is the process of creating new machines and improving existing machines so they are economical to produce and operate. The basic knowledge required for machine design includes mathematics, engineering mechanics, strength of materials, workshop processes, engineering drawing, computing, and finite element analysis. The general procedure in machine design involves recognizing the problem, selecting an appropriate mechanism, analyzing stresses on components to determine sizes, modifying sizes to reduce costs, and producing the design. A design engineer is expected to have in-depth technical knowledge, communicate effectively, solve problems innovatively, and stay up to date with technological advances.

1. Unit- I – Introductionn to and Design
of Simple Machine Parts
Numerical Should be asked on Preferred sizes and Theories of Failure (b,c)

2. Machine Design
What is the importance of Machine Design for
engineers?
What is Machine Design?
Creation of new and better machines AND
Improving existing ones
So that it is economical in the cost of production and operation.

3. Machine Design
Requirement
Model
(Rough idea)
Creation
How a design is born
marketability
Availability of
FUNDS
Available
material
Manufacturing
resources
Analysis
Market
survey
Aesthetic
Ease of
handling
Safety
Economical
Recyclability
Force/stress
Material/s
used
Sizes

4. What is the basic knowledge required for Machine
Design?
•Mathematics
•Engineering Mechanics
•Strength of Materials
•Mathematics
•Engineering Mechanics
•Strength of Materials
•Workshop Processes
•Engineering Drawing
• Mathematics
• Engineering Mechanics
• Strength of Materials
• Workshop Processes
• Engineering Drawing
• Computing
• Finite Element Analysis, Computational Fluid Dynamics etc
• Mechanics of Machines
• Mechanics of Materials
• Fluid Mechanics & Thermodynamics

5. General procedure in Machine Design…..
Detailed drawing
Need or aim
Synthesis &
Joining
Method
Analysis of the FORCES
Material selection
Design of elements
Modification
Recognize and specify the problem
Select the mechanism that would give the desired
motion and form the basic model with a sketch etc
Determine the stresses and thereby the
sizes of components s.t. failure or
deformation does not occur
Modify sizes to ease construction & reduce overall cost
Production

6. Requisites of Design Engineer
A design engineer is expected to possess the following qualities:
•Sound and in depth knowledge of design principles and methods
•Adequate knowledge of other area such as strength of materials, theory of machines,
mechanics of materials and their heat treatment processes surface coating process etc.
•Adequate knowledge of manufacturing processes ,fits tolerances and ability to communicate
with shop floor people
•Ability to read and prepare drawings
•Adequate knowledge of cad tools like finite elements analysis ,geometric modeling (2D,3D)
and simulations
•Ability to work in a team and lead the team
•Ability to effectively communicate and sell the ideas to others
•Problem solving ability
•Innovativeness and greater creativity
•Ability to keep the pace with the rapid technology developments