Technical drawing instruments and materials are tools that can be used to measure and draw corresponding plans. Some are pencils, rulers, compasses, and protractors.
They can also be used to improve the consistency and speed of creation of standard drawing elements. The tools used in manual technical drawing have been displaced by the growth of the personal computer and its common use as the most widely used tool in computer technical drawing, whether in drawing or design..
The drawing board is an essential tool in technical drawing. The paper is attached to it; stands upright and firm, in this way the drawing can be made accurately.
The drawing table is usually mounted on a floor stand in which the table can be rotated in different positions, its height can also be adjusted..
Masking tape is often used to secure the paper to the board, including the sophisticated use of individual adhesives from a dispenser roll..
Some drawing boards are magnetic, allowing the paper to be held in place through long rolls of metal..
Smaller drafting tables are also produced to be used at table level..
Traditionally the needles used in technical drawing are pencils and technical pens. The pencils that are usually used are mechanical pencils with an ink of standard thickness.
The standard width of the lines varies between 0.8 mm, 0.25 mm, 0.5 mm and 0.7 mm. Hardness usually ranges from HB to 2H. Softer strokes generally provide better contrast, but stronger strokes provide a more precise line.
Although poor trace contrast can be problematic when photocopying the final result, newer copying techniques can improve the final result. Paper or plastic surfaces require their own types of lead.
In most cases the final technical drawings are drawn with ink, either on plastic or on a tracing paper. The pencil is generally a technical rapidgraph pencil; a pen that consistently marks the width of lines.
The pen has an ink container that contains a metal tube, in which is a needle or thin metal wire. The ink is absorbed between the needle and the tube wall, preventing an excessive amount of ink from coming out.
The square, in the shape of an isosceles triangle, one angle of 90º and two of 45º, is used together with the bevel to make parallel and perpendicular lines.
The bevel is shaped like a scalene right triangle.
Used to measure angles in degrees.
Usually the rules used in technical drawing are made of polystyrene. Rulers can be divided into two types based on their border design.
A straight edge ruler can be used with lead pencils and markers, while when using a technical pen the ruler should have a ribbed edge to avoid spilling ink..
The graduated ruler or scale ruler is a three-edged graduated ruler that has six different types of scales marked on its edges..
Currently, these rules are made of plastic. In ancient times they were made of wood. There are also pocket versions.
It is a type of ruler in the shape of a prism that has different scales.
A T-ruler is a flat surface that uses the edge of the drawing board for support. It is used with the drawing table to draw horizontal lines and to align other drawing tools..
T-rulers made of wood, metal, or plastic can be used; triangle-shaped, with 30 °, 60 °, or two 45 ° angles. This way you can quickly draw lines with these commonly used angles..
An alternative to the T-rule is a parallel bar that is permanently attached to the drawing board..
It has a pair of cables and pulleys that allow it to be positioned anywhere on the drawing surface, while remaining parallel to the bottom of the drawing table. This instrument can replace both the T-ruler and triangles.
Compasses are designed to draw circles or arc segments of circles. A type of compass has two right arms joined by a hinge; one arm has a sharp pivot point, while the other has a holder for the technical pen or pencil.
On the other hand, the beam compass has the pivot point and a pen holder attached by a bar, useful when drawing many large radial arcs.
Usually a circular template is used instead of a compass if you need to draw circles of predetermined sizes..
Stencils contain pre-sized holes in the correct scale to correctly draw symbols or shapes.
Letter templates are used to draw text, including digits and letter characters. Diagrams usually have a standard font and size.
For drawing circles or circle items, circle templates contain different sizes of the same shape.
Stencils are also available in other commonly used geometric shapes such as squares and ellipses, as well as a specialized variety for other purposes.
There are also specific templates to be used in different branches of technical drawing.
For example, architectural templates can be used to draw doors of different sizes with their respective "opening arches"; in that branch there are also templates to draw buildings, furniture and other corresponding symbols.
It is a tool in which you can put mines to draw.
It is a template that is used to draw curves.
Depending on the activity and the project, different types of paper can be used. Some examples of the most common include:
Plastic has advantages over translucent paper; it is mechanically stronger and has more dimensional concordance, since plastic does not shrink or stretch like paper.
Additionally, plastic is a completely flat surface, while the surface of paper is relatively rough..
Plastic can be used with pencils and drawing pens, however its surface tends to weaken the tips of the pens..
They are used to erase what has been drawn with a pencil. They are usually made of synthetic rubber and soy-based synthetic rubber.
It is a device for sharpening the tip of a pencil by scraping its surface. Although pencil sharpeners can be used comfortably manually, there are also electric ones.
One of the most used computer programs is autocad.
Yet No Comments