Graphic Design & Printing TechnologyUnit - 6
Engineering Graphics..................................................................
Introduction
It is a graphical language that communicates ideas and information from one
mind to another. One of the best ways to communicate one’s ideas is through
some form of picture or drawing. This is especially true for an engineer. The
purpose of this unit is to give you the basics of engineering sketching and
drawing. We will treat “sketching” and “drawing” as one. “Sketching” generally
means freehand drawing. “Drawing” usually means using drawing instruments,
from compasses to computers to bring precision to the drawings.
Learning Outcomes
The learner:
- recognises letteting, numbering, dimensioning.
- applies principles of geometrical constructions.
- constructs basic shapes such as square, rectangle, circle, ellipse, etc.
- understands about projections of points, lines and planes.
- draws basic section views, auxillary views and ismetric views.
DRAWING INSTRUMENTS
Drawing Instruments are used to prepare drawings accurately and easily. The
accuracy and quality of drawing depends on the accuracy and quality of drawing
instruments. The following are the commonly used materials and tools in
engineering drawing.
Basic Tools and materials
- Drawing board, Drawing paper, pencil, eraser, Drawing pins/ tape, Clips,
Duster.- T-Square and Set Square, Mini drafter, Scales, Dividers and Protractor.
- Compass, French curves and Templates