Winter Semester 2015
R.Oyyaravelu
Assistant Professor
TEXT BOOK
1. Mikell P. Groover and Emory W. Zimmers, CAD/CAM Computer Aided Design and
Manufacturing, Prentice Hall Edition, 2004.
REFERENCE BOOKS
1. Mikell P. Groover, Automation, Production Systems a

Introduction to CAD/CAM
1
CAD/CAM
CAD/CAM = Computer Aided Design and
Computer Aided Manufacturing. It is the
technology concerned with the use of
computers to perform design and
manufacturing functions.
2
CAD can be defined as the use of computer
syste

PRODUCT DEVELOPEMT CYCLE
New Product Development
Companies must be constantly modifying
existing products and developing new ones;
the marketplace demands it.
How new is new? most new products are
modifications of or extensions to existing
ones.
The in

Hardcopy Printers and
Plotters
About
Both printers and plotters are available for
creating final drawing and documentation
Relatively slower drawing rate as compared to
screen
There are two types of plotting
Vector plotting-depends on the coordinates
Rast

Synthetic Curves
Analytic curves are not sufficient to meet geometric design
requirements of mechanical parts.
Products such as car bodies, airplanes, propeller blades,
etc. are a few examples that require free-form or synthetic
curves and surfaces.
Ma

TRANSFORMATIONS OF
GEOMETRY
Why Transformation?
It is the backbone of computer graphics, enabling
us to manipulate the shape, size and location of
the object.
The basic transformations are translation,
scaling, reflection, rotation and combination of
on

Line Drawing Algorithms
Line Equations
Lets quickly review the equations involved
in drawing lines
Slope-intercept line
y
equation:
y m x c
y2
where:
y2 y1
m
x2 x1
y1
x1
x2
x
c y1 m x1
Lines & Slopes
The slope of a line (m) is defined by its start
and end

Geometric Modelling
Learning objectives
To understand the functions and requirements of
geometric modelling in manufacturing
To study the different types of geometric
modelling techniques
To recognize the different types geometric
entities and its math