cad

1. Unit-1 Introduction
• Product cycle- Design process- sequential and
concurrent engineering- Computer aided design –
CAD system architecture- Computer graphics – co-
ordinate systems- 2D and 3D transformations-
homogeneous coordinates - Line drawing -Clipping-
viewing transformation -Brief introduction to CAD
and CAM – Manufacturing Planning, Manufacturing
control- Introduction to CAD/CAM –CAD/CAM
concepts ––Types of production - Manufacturing
models and Metrics – Mathematical models of
Production Performance

2. Product Cycle

3. Design Process

5. Sequential Engineering
• The process of marketing, engineering design,
manufacturing, testing and production where each stage of
the development process is carried out separately, and the
next stage cannot start until the previous stage is finished.
• The information flow is only in one direction.

6. Concurrent Engineering
• concurrent engineering involves the formation of cross-
functional teams, which allows engineers and managers of
different disciplines to work together simultaneously in
developing product and process design.

7. Difference between Sequential engineering and
Concurrent engineering
Sequential
1. Sequential engineering is the
term used to describe the
method of production in a
linear format.
2. The different steps are done
one after another.
3. After it is completed it is left
alone and everything is
concentrated on the next task.
4. Time Consumption for
marketing is more
Concurrent
1. The concurrent engineering is
a non-linear product or project
design.
2. several teams within an
organization work
simultaneously to develop
new products and services.
3. different tasks are tackled at
the same time, and not
necessarily in the usual order.
4. Time consumption for
marketing is less

8. Computer Aided Design
• computer systems to assist in the
creation, modifications, analysis and
optimization of a design.
• Activities of the CAD process are mass
properties, finite element analysis,
dimensioning, tolerancing, assembly
modeling, generating shaded images, and
documentation and drafting.
• The CAD process and its tools utilize three
disciplines: Geometric Modeling,
Computer Graphics, and Design

9. CAD system architecture

10. Basic Structure of a CAD system

11. I/O devises of CAD system

12. Graphics Display
CRT

13. Types of Graphic Display based on
Scan technology
Raster Scan
Random Scan
The screen is scanned from
left to right, top to bottom all
the time to display graphics.
The screen is not scanned in a
particular order.