Introduction to Engineering Drawing

ENGINEERING DRAWING-IDWG-101

Aamir Naveed

Lecture # 1

Text Book

“Fundamentals of Engineering Drawing”by

French & Vierck

Course Breakdown

Course Breakdown

Course Breakdown

Drawing ToolsTwo conventional / mechanical pencils: 0.7 and 0.5 mm, or 0.5 and 0.3 mm, or 0.3 and 0.6mm combinations; Pencil grades – HB and H, or F and 2H combinationsOne compass and one dividerOne set of 45- and 30/60-degree trianglesTwo scales (one English unit and one Metric unit)One irregular curve (French curve)One protractorOne T-scale (optional)One good sharpener and eraser

Types of Pencils

The best pencil for lettering on most surfaces are the H, F, and HB grades.

Learning Objectives

To introduce the basic concept of the engineering drawing

Importance of the subject

Definition of the drawing

Introduction

Engineering Drawing is just that communication mode, which can describe the minute details even without wasting enormous time and effort.

By definition “Engineering Drawing is the graphical representation of physical objects and relationships”.

Introduction

It is accomplished by describing the shape and size of the object with the help of “Lines” and “Letters”

Lines represent the surfaces and edges of the object.

Letters represent the symbols. Dimensions and word notes.

Method of Expression

There are two methods of making an Engineering Drawing

1-Free Hand Drawing

Done only with pencils and erasers

Used during learning process

Used also for preliminary designing

2-With Instruments

Standard Method of Expression

Used for all types of drawings (including detailed aircraft designing)

Single Stroke Gothic Lettering

Lettering – Vertical Gothic Font

13

Lettering with Fractions

Sketching Techniques