Unit 2 drawing applied to technology
This presentation is the property of its rightful owner.
Sponsored Links
1 / 31

Unit 2.Drawing applied to technology PowerPoint PPT Presentation


  • 130 Views
  • Uploaded on
  • Presentation posted in: General

Unit 2.Drawing applied to technology. Unit 2.Drawing applied to technology. What are we going to see in this unit? 2.1 Drawing tools and how to use them 2.2 Drafts and sketches 2.3 Drafting scale 2.4 Diedric system 2.5 Marking and standardizing. 2.1 Drawing materials and instruments.

Download Presentation

Unit 2.Drawing applied to technology

An Image/Link below is provided (as is) to download presentation

Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.


- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -

Presentation Transcript


Unit 2 drawing applied to technology

Unit 2.Drawing applied to technology


Unit 2 drawing applied to technology1

Unit 2.Drawing applied to technology

  • What are we going to see in this unit?

    • 2.1 Drawing tools and how to use them

    • 2.2 Drafts and sketches

    • 2.3 Drafting scale

    • 2.4 Diedric system

    • 2.5 Marking and standardizing


2 1 drawing materials and instruments

2.1 Drawing materials and instruments

Paper

  • Paper is made of cellulose that is obtained from trees

  • The paper size that we use is A4 . It is the result of dividing 1 m2 (A0) four times by half the longest side.


2 1 drawing materials and instruments1

2.1 Drawing materials and instruments

Pencil

  • A pencil is lead in a wooden casing. The lead is made with graphite and clay

Lead

clay

Woodencasing

Graphite


2 1 drawing materials and instruments2

2.1 Drawing materials and instruments

Pencil hardness

The more clay it contains the harder the lead will be. We use letter H for hard pencils and letter B for soft ones.

Hard: H Soft: B

less clay

More clay

Technical drawing

Artistic drawing


2 1 drawing materials and instruments3

2.1 Drawing materials and instruments

Mechanicalpencils

Theyholdgraphite lead. They can beusedfortechnicaldrawingifusedwitha soft lead.

ERASERS

Erasers are made of rubber; theyabsorb

graphite and erase it.


2 2 draft and sketch

2.2 DRAFT AND SKETCH

  • DRAFT: Itis a free hand drawing (with just a pencil). We show an idea or object without totally defining it.


2 2 draft and sketch1

2.2 DRAFT AND SKETCH

  • ATTENTION!

  • A DRAFT IS NOT A BAD DRAWING AND A SKETCH IS NOT A GOOD DRAWING !!!!!!


2 2 draft and sketch2

2.2 DRAFT AND SKETCH

The sketch: Itis a free handdrawingtoo, butitincludesthemeasurements, thereforeit shows the precise size and a shape similar tothe final drawing.

measure

Page 41


2 2 draft and sketch3

2.2 DRAFT AND SKETCH

  • Activity: draw a sketch of your home cupboard.


2 2 draft and sketch4

2.2 DRAFT AND SKETCH

the Sketch


2 3 drafting scale

2.3 Drafting scale

  • We define scale as the relationship between the size of the drawing and the real object.

A model uses a reduction scale


2 4 diedric system

2.4 Diedric system


2 4 diedric system1

2.4 Diedric system

The diedric system represents the objects using a perpendicular projection on a plane


2 4 diedric system2

2.4 Diedric system

The projection or VIEW consists of drawing just what we see when we are perpendicular to the object and to the plane

Page 28


2 4 diedric system3

Top view

Profile view

Front view

Profile view

Front view

Top view

2.4 Diedric system

To define an object we only need 3 views, top, front and profile:

  • Top view: from the top of the object

  • Front view: facing the object

  • Profile view: from the side


2 4 diedric system4

Right profile

front

front

Left profile

top

top

2.4 Diedric system

Diedric Rules

  • The front is usually indicated with an arrow

  • The views distribution

    • The front is always on top of the top view

    • The profile is situated the other way round, that is, the left profile is situated on the right


2 4 diedric system5

2.4 Diedric system

Remember:

  • The same height: the object has the same height on the floor and on the profile views

  • The same width: on the front and on the top views

  • The same depth: on the floor and on the profile views


2 4 diedric system6

2.4 Diedric system

  • Exercise: Draw the front, left profileand floor views of the class chair


2 4 diedric system7

2.4 Diedric system

  • Exercise: Draw the front, profile and floor views of the class chair


2 4 diedric system8

2.4 Diedric system

Where do we have to be situated to see these objects like circles?


2 4 diedric system exercise 11 complete the views of the following objects

2.4 Diedric systemExercise 11: Complete the views of the following objects

Page 31


2 4 diedric system exercise 11 complete the views of the following objects1

2.4 Diedric systemExercise 11: Complete the views of the following objects


2 4 diedric system exercise 11 complete the views of the following objects2

2.4 Diedric systemExercise 11: Complete the views of the following objects


2 4 diedric system exercise 11 complete the views of the following objects3

2.4 Diedric systemExercise 11: Complete the views of the following objects


2 4 diedric system9

2.4 Diedric system

  • Non visible lines: when we know there is a hidden line we have to draw it using a discontinuous line

hidden line


2 5 marking and standardizing

2.5 Marking and standardizing

  • Standardizing is the group of rules that defines technical drawing.

  • For example:

    • For paper size we use the DIN rule: A0,A1,A2…

    • The lines are:

      • Thick continuous lines: are used to outline objects

      • Thick discontinuous lines: indicate hidden lines

      • Thin continuous lines: are used for auxiliary measures and reference lines


2 5 marking and standardizing1

Reference line

2.5 Marking and standardizing

Measure

Dimensionline

ExtensionLine


2 5 marking and standardizing2

2.5 Marking and standardizing

Outsidethickcontinuous line

a discontinuousline of mediumthicknessfor a hiddenedge


2 5 marking and standardizing3

2.5 Marking and standardizing

Marking : indicating the real dimensions of the object


Vocabulary

Vocabulary

  • Paper size

  • Cellulose

  • Clay, graphite, lead

  • Hard and soft pencils

  • Erasers, technical pencil

  • Sixty and forty-five degree rules

  • Sketch, draft, free hand drawing, measures

  • Scale, real and drawn size, reduction, enlargement scales

  • To be reduced 100 times…

  • Length, height, width

  • Long, high, wide.


  • Login