lunes, 17 de septiembre de 2018

1º ESO LEARNING TO DRAW

1-   LEARNING TO DRAW (TECHNICAL GRAPHICS)

Introduction

As a student of Technical graphics you are about to learn how to express your ideas using drawings, sketches and symbols. Ideas that are presented like this are easily understood by anyone who understands the language of Technical Graphics.
We live in a technological age. Every product and structure you see today began as an idea in somebody’s head.
Ones a new invention is thought of, a long process of design, refinement and manufacture is undertaken before the product is eventually sold.

Technical Graphics Equipment

Pencils
Pencils are use for drawing lines. Different types of pencils allow you to draw lines of different weight and thickness. The grade of a pencil is denoted by the letters H, B.
H= Hard
B= Black
Types of pencils:
            Wooden pencil
            Fine line pencil or Mechanical pencil (refills)
            Clutch pencil
Graduated ruler
This is a precision tool we use to measure distances. It is usually made of plastic and has a bevelled edge (borde biselado) with the measurements marked in millimetres.
Set Squares
Set squares are use for drawing vertical and inclined lines.  Set squares are made from transparent plastic and there are two main types.
     - 45º set square- used to draw vertical lines and lines at 45º.
     - 30º/60º set square- used to draw vertical lines and lines at 30º and 60º
Protractor
A protractor is used for measuring angles.
Compass
A compass is used to draw circles and arcs. Types: compass, a pencil compass and a bow compass.
Drawing paper
All technical graphics work is completed on drawing paper which comes in a number of standard sizes.
A0= 1189 mm x 84 mm= 1 m2
A1=  841mm x 594 mm
A2= 594 mm x 420 mm
A3= 420 mm x 297 mm
A4= 297 mm x 210 mm
A5= .......
Drawing Aids and Stencils
            - French Curves
            - Flexi Curves
            - Stencils: there are used for the drawing of circles, ellipses as well as various   graphical symbols.
            - Ink Pens: ink pens are used to draw lines of precise thickness.

USING THE TRIANGULAR SET SQUARE
How to draw parallel lines using set square
How to draw perpendicular lines using set square
Drawing angles with the set of triangles