Introduction to Graphic Communication - DRAW 111

Drawing

is a graphic representation of an object, or a part of it, and is the result of creative thought by an engineer or technician

Drawing

is one of the oldest forms of communicating, dating back even farther than verbal communication

Drawing

is a way of communicating all necessary information about an abstract, such as an idea or concept or a graphic representation of some real entity, such as a machine part, house or tools

Artistic and Technical Drawings

two basic types of drawings

Artistic Drawings

range in scope from the simplest line drawing to the most famous paintings

Artistic Drawings

Regardless of their complexity, they are used to express the feelings, beliefs, philosophies, and ideas of the artist

Technical Drawings

is not subtle, or abstract

Technical Drawings

does not require an understanding of its creator, only an understanding of technical drawings

Technical Drawings

is a means of clearly and concisely communicating all of the information necessary to transform an idea or a concept in to reality

Technical Drawings

are based on the fundamental principles of projections

Projection

is a drawing or representation of an entity on an imaginary plane or planes

1. The actual object that the drawing or projection represents

2. The eye of the viewer looking at the object

3. The imaginary projection plane

4. Imaginary lines of sight called Projectors

a projection involves four components:

Parallel Projection

is a type of projection where the line of sight or projectors are parallel and are perpendicular to the picture planes

Parallel Projection

is subdivided in to the following three categories: Orthographic, Oblique and Axonometric Projections

Orthographic, Oblique and Axonometric Projections

categories of Parallel Projection

Orthographic projections

are drawn as multi view drawings, which show flat representations of principal views of the subject

Oblique Projections

shows the full size of one view

Axonometric Projections

are three-dimensional drawings, and are of three different varieties: Isometric, Dimetric and Trimetric

Perspective Projection

projections are drawings which attempt to replicate what the human eye actually sees when it views an object

One-point, Two-point and Three-point Projections

are three types of perspective projections

design process

To appreciate the need for technical drawings, one must understand the ______ _______.

Design Process

is an orderly, systematic procedure used in accomplishing a needed design

designed

Any product that is to be manufactured, fabricated, assembled, constructed, built, or subjected to any other types of conversion process must first be ________

designed

For example, a house must be ________ before it can be built

Technical Drawing

are used in many different applications.

Surveyors, civil engineers, sanitarians

they use technical drawings to document such works as the layout of new subdivisions, or the marking of the boundaries for a piece of property

Contractors and construction personnel

they use technical drawings as their blue prints in converting architectural and engineering designs in to reality

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Discuss the different types of drawing

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Explain the different application of technical drawing

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What is graphic communication?

Drawing Paper

is the paper, on which drawing is to be made

Title block

is a rectangular frame that is located at the bottom of the sheet

Triangles

also called as setsquares

Triangles

They are used to construct the most common angles (i.e. 30 deg, 45 deg, 60 deg) in technical drawings

45 x 45 and 30 x 60 triangles

are the most commonly used for ordinary work

T- square

is used primarily to draw horizontal lines and for guiding the triangles when drawing vertical and inclined lines

Protractor

is used for laying out and measuring angle

Scale

also known as ruler/footrule

Scale

used to measure lengths and dimension

mongol 1

used for visible object lines and border lines

mongol 2

is used for re-penciling light finished lines

mongol 3

used for light construction lines and guide lines

Compass

is used to draw circles and arcs both in pencil and ink. It consists of two legs pivoted at the top.