Intro to Graphic Communication for Engineers

1. Topics
 Graphic Language &
Design
 CAD Systems
 Sketching
Techniques
 Lettering
 Geometric
Constructions
 Multiview Projection
 Sectional Views
 Auxiliary Views &
Developments
 Dimensioning
 Tolerancing
 Working Drawings

2. What is Graphic
Communication?
 a universal language
– Standards organizations like ANSI (American
National Standards Institute) and ISO
(International Standards Organization) publish
standards detailing how drawings should be
created so they can be interpreted universally.
 the primary medium for communicating
and developing design concepts

3. Why Graphic Communication?

4. Design
 Design is the ability to combine ideas ,
scientific principles, resources, and
existing products into a solution for a
problem
 The design process is an organized
orderly approach to the problem.

5. The Engineering Design Process

6. Design is an Iterative Process
 Begins with a
recognition of need for
a product, service, or
system
 During the idea phase
encourage a wide
variety of solutions
through brainstorming,
literature search, and
talking to users
 Best solutions are
selected for further
refinement
 Models or prototypes
are made and problems
that arise may require
new ideas to solve and
a return to an earlier
stage in the process
 Finally drawings are
released to
manufacturing for
production

7. Engineering Design
Uses Sketching & CAD
 Ideas are initially sketched and then more
accurate CAD drawings are created
 A single accurate CAD database can be used
to go from ideation to manufacturing and
documentation.
 Finite Element Analysis, 3D rendering,
animation, documenation, rapid prototyping
software are available for use with CAD.

8. Terminology
CAD: Computer Aided Design
CADD: Computer Aided Design & Drafting
CAM: Computer Aided Manufacturing
CIM: Computer Integrated Manufacturing
CAE: Computer Assisted Engineering
Reading Drawings: Interpreting drawings made by others
Technical Drawing: Drawings used to express technical ideas
Engineering Design Graphics: Technical Drawings representing
designs & specifications for physical objects

9. Freehand Sketching
 Freehand sketching is used in engineering
graphics to quickly communicate your ideas
or designs.
 Drawing instruments and CAD are not always
available, especially during field work
 Freehand sketching is not sloppy sketching!
Your sketches need to be interpreted by
others on your design team

10. Example Freehand Sketch for Concept Development

11. Summary
 Engineering drawing can be a universal
language to communicate your ideas.
 The engineering design process uses
sketching and CAD to communicate and
record ideas.
 A single CAD database can be used to
produce many types of drawings and models
used throughout the design process.