Se ha denunciado esta presentación.
Se está descargando tu SlideShare. ×
Anuncio
Anuncio
Anuncio
Anuncio
Anuncio
Anuncio
Anuncio
Anuncio
Anuncio
Anuncio
Anuncio
Anuncio
Próximo SlideShare
Drawing tools
Drawing tools
Cargando en…3
×

Eche un vistazo a continuación

1 de 22 Anuncio

Más Contenido Relacionado

Presentaciones para usted (20)

Anuncio

Similares a Technicaldrawing (20)

Anuncio

Más reciente (20)

Technicaldrawing

  1. 1. TECHNICAL DRAWING
  2. 2. Drawing  Technical drawing is the method of communication that is specific to the field of technology  It is used to represent the objects that we design and built. Ingredients of technology
  3. 3. Drawing  Now, let´s learn the basic drawing instruments Ingredients of technology
  4. 4.  Pencils are made of wood and a graphite core, called lead. PENCIL  Pencil leads are classified by hardness as follows: Soft • Numbers: 0 or1 • Letters: 8B to 3B Medium • Numbers: 2 or 3 • Letters: 2B, B, HB and F Hard • Numbers: 4 or 5 • Letters: H to 5H Very hard • Numbers: 6 to 9 • Letters: 6H to 10H
  5. 5. PENCIL  When we write, the graphite latch on to the paper.  If the pencil is a hard one the amount of graphite is a bit one, and the mark in the paper is light.  On the other hand if it´s a soft one the amount of graphite is bigger, and the mark is dark.
  6. 6.  Soft Pencils are used for sketches and artistic drawing. PENCIL  Hard Pencils are used for plans and technical drawing .
  7. 7.  Propelling pencils have a lead into a body, commonly made of plastic. PROPELLING PENCIL  Propelling pencils provide lines of constant thickness without sharpening.  They are used in technical drawing (not in artistic drawing) and writing.
  8. 8.  The lead of the propelling pencils can have:  Different hardness  Different diameters, to fit into a lead into the reservoir tube. PROPELLING PENCIL Diameter Hardness
  9. 9.  White vinyl rubbers are recommendes. RUBBER  Rubbers are used to correct errors made when writing with pencil.  When you erase:  Follow the direction the line was draw in.  Use smooth movements so the paper doesn´t wrinkle
  10. 10. RULER  Rulers are instruments used to draw straight lines and measure segments. Common ruler: It´s marked along one side. Engineer´s scale: It´s a triangular prism on which the six most common scales are etched.
  11. 11.  The set of squares are two right triangles used to draw paralel and perpendicular lines. SET OF SQUARES  They let us to draw differents angles combining the measures of the angles of the set . For example: 90º+45º = 135º 30º+45º = 75º 60º+45º = 105º 90º+60º = 150º leg leg
  12. 12. Parallels and perpendiculars  Parallels in vertical: Parallels in horizontal:
  13. 13. How to use drawing tools  Drawing angles: we can get 15º, 30º, 45º, 60º, 75º, 90º, 120º, 135º…angles by combining the 30º, 45º, 60º and the 90º angles from the set squares
  14. 14. You can get 45º, 75º, 90º, 120º angles combining the set squares
  15. 15.  The protactor is used to measure or draw angles. PROTACTOR  It used to be semicircular and is divided into 180 degrees.
  16. 16.  The stencils are used when standard symbols are to be drawn repeatedly. They have standard symbols cut in it. TEMPLATES
  17. 17.  The compass is an instrument used to draw circunferences or circular arcs, as well as to measure segments. COMPASS  It can be adjusted to hold a technical pen.  Or with an extension piece to draw bigger circunferences
  18. 18.  The paper is the basis for all technical drawings. PAPER  Paper can be clasified by:  Size  Weight  Finish
  19. 19.  There are different sizes of paper. They are also called formats. PAPER (Size)  In technical design, the most common formats are the “A” series, based on the DIN (Deutsche Industrienorm)
  20. 20.  A0 is a rectangle with an area of 1 m2. PAPER (Size)  Each format is calculated by dividing the previous format in half.  The format we usually use is the A4 (297x210 mm)
  21. 21.  The weight of the paper indicates how thick or thin it is. PAPER (Weight)  Usually the weight is indicated in grams per square metre.  More grams implies a thicker paper
  22. 22.  The finish of the paper shows the appearance of the surface of the paper. PAPER (Finish)  It can be white or coloured  It can be brilliant or dull  It can be rough or smooth  It can be opaque or translucent

×