Unit01 drawing

Ies Diego Torrente Pérez Pg 1 Technology Department

GRAPHICAL EXPRESSION ANDCOMUNICATION.

Drawing is the way we show what an object is like.

1. DRAWING MATERIALS. To draw, we need some drawing tools. The main ones are:

A pencil: it s the basic tool for drawing. Pencils contain a lead made of graphite and clay.

Types of pencils: A) Soft-leaded pencils: we can recognize them by the letter B. B) Hard-leaded pencils: we can recognize them by the letter H.

To draw, we can also use markers and leads.

Rubber: it s made of rubber and it is used to erase pencil marks.

Paper: there are a lot of types and sizes ofpaper.

The european DIN rule classifies paper into 9 sizes:A0, A1, A2, A3, A4, A5, A6, A7, A8.

The appearance refers to colour, brightness andtexture of paper. It can be shiny, matt, smooth, rough, etc.

The size of paper we commonly use is A4.


DRAW A SEMICIRCULAR PROTRACTOR






VIEWSWe can say the views of an object are diferent images that we obtained:

To watch frontwards or a frontal view of an object(FRONT).

From the top view of an object (PLAN).

Finally from the left side of an object (SIDE)


ISOMETRIC PIECES

DRAW IN ISOMETRIC GIVEN THE VIEWS





DIMENSIONING: BASIC RULES

Use enough dimensions to show the size of all object features.

Do not repeat dimensions if you already have them or they can be worked out from others you have on the drawing.

Place dimensions in the clearest possible way.

All dimensions will be written using the same unit.

Stand-alone numerical values mean millimeters.

Dimensions should be read from the bottom (horizontal lines) or right hand side (vertical lines)

Dimension values must be placed above and parallel to dimension line.




Draw the 3 views and makethe dimensioning



Education

Unit01 drawing