Mechanical

1. COMPUTER AIDED
DESIGN AND
MANUFACTURING
7th Semester
Mechanical Engineering
Lecture 1Introduction to CAD/ CAM

2. Course Objectives
7/23/2020
2
 To introduce the student to be familiar with CAD/CAM terminology & its capabilities.
 To become familiar with CAD/CAM software, Graphical user interface & basic tools.
 To recognize geometric and graphical elements of engineering design problems
 To apply a “hands-on” understanding of the basic concepts of computer-aided manufacturing and
prototyping through group and individual projects
 To study Basic features of CAM so as to be capable of accepting professional responsibilities and to
understand the associativity between design and manufacturing.
 Integrate the CAD system and the CAM system by using the CAD system for modeling design
information and converting the CAD model into a CAM model for modeling the manufacturing
information.
Lecture 1Introduction to CAD/ CAM

3. Syllabus
7/23/2020
3
Unit- I - Introduction of CAD/CAM
Window and View port
Unit- II - Geometric Modeling
Geometric Modeling of
Curves
Unit- III - Representation of Surface
Solid Modeling
Unit- IV - Numerical Control
NC Part Programming
UNIT –V- Group Technology
Computer integrated
manufacturing (CIM) system
Text Books:

4. Lecture 1Introduction to CAD/ CAM7/23/2020
4
Introduction to CAD/CAM
Outlines
 What is design?
 What is computer –Aided design(CAD) & Computer Aided Manufacturing
(CAM)?
 Application of CAD in mechanical engineering
Advantages of CAD over manual Drafting
 How a CAD system is used in product design
 CAD system hardware and software.

5. Lecture #1Introduction to CAD/ CAM7/23/2020
5
 Design is essentially a decision making
process
 For every problem we need to design
solution.
“Design is to formulate a plan
to satisfy a particular need
and to create something with
a physical reality.”
1. What is Design?
GENERAL DESIGN
PROCEDURE
• Recognition of need
• Synthesis (Mechanism)
• Analysis of forces
• Material selection
• Design of elements (size and
stress)
• Modification
• Detailed drawing
• Production (Manufacturing)

6. Lecture #1Introduction to CAD/ CAM7/23/2020
6

7. Lecture #1Introduction to CAD/ CAM7/23/2020
7
What is Drawings?
- Drawing is rough sketch which give some message or
information about production. (like shape of product)
What is Drafting ?
- Drafting is a language of engineers with
exact scaling, dimension, measurements,
accuracy and with standard like ISO,
ASME…etc.

8. Lecture #1Introduction to CAD/ CAM7/23/2020
8
What does mechanical engineers do in C
– Mechanical engineers do drafting
and design and prototype testing
(analysis) operation in CAD.
– Use to creates graphic representation
of physical object.
Computer – Aided Design (CAD)
• One of the main applications of
computer technology is computer Aided
design (CAD), side by side with the
computer aided manufacturing (CAM).
• CAD stands for Computer Aided
Design and Computer Aided Drafting.
• It’s an integration of computer science
techniques for engineering design.
• The term computer aided design
characterizes any design activity which
incorporates an electronic computing
machine in the process of development ,
analysis or modification and optimization
of design.

9. 7/23/2020
9
Lecture #1Introduction to CAD/ CAM
Generally the main function of CAD is used to
– Create graphic representation (create 2D/3D drafting)
– 3D modelling (individual component modelling and Assembly modelling)
– Used for analysis (stress analysis, kinematic analysis,..etc.)
– Used for simulation the system( collusion simulation, robotic simulation..
etc.)

10. Lecture #1Introduction to CAD/ CAM7/23/2020
10
Computer Aided Manufacturing - CAM
• CAM technology involves computer systems that
plan, manage and control the manufacturing
operations through computer interface
• One of the most important areas of CAM is
numerical control (NC). This is a technique of using
programmed instructions to control a machine tool
that cuts, mills, grinds, punches or turns raw stock
into a finished part.
• Another significant CAM function is in the
programming of robots. Process planning is also a
target of computer automation.

11. Lecture #1Introduction to CAD/ CAM7/23/2020
11
• Automotive industry
• Aerospace and air craft industry
• Textile industry/ Fashion Design
• Tool and die making industry
• Die manufacturing industry
• Welding and cutting industry
• Jigs and fixture manufacturing...etc
1.3 Application of CAD in mechanical
engineering