We explain what the technical drawing is and the types of technical drawing that are made. In addition, what are the lines you use.
What is technical drawing?
The technical drawing is a branch of the known drawing, such as the system that graphically represents one or more objects, in order to provide useful information for a possible and consequent year. lysis that will allow a next construction and maintenance of the object.
The technical drawing is the graphic language that is used to communicate, within the framework of industrial and design activities, from the most global ideas to the details linked to a technological content Gico.
The technical drawing has also been defined as the system of graphic representation of existing objects or prototypes, according to norms and conventions pre-established by regulatory institutions. This makes it possible to describe precisely and clearly the dimensions, shapes and characteristics of these material objects .
It should be noted that the idea of technical drawing is often in opposition to that of artistic drawing. While the first is intended to express impressions or personal sensations, influenced by the imagination and individual experiences, so it is eminently subjective, the technical drawing aims to be objective and represent the objects as best as possible, in a totally objective way, in order to provide any observer with the technical information necessary for its technical analysis, eventually helping with its design, construction and / or maintenance.
Regarding the history of technical drawing, we can not fail to mention the first Greek mathematicians such as Thales, Pygogoras and Euclid, who laid the foundations of the so-called fundamental geometry of space, in this discipline During the Renaissance, the contributions of Brunelleschi and the famous and multifaceted Leonardo da Vinci stand out.
Schemes, sketches, diagrams and drawings are technical drawing modalities that contain specifications corresponding to measures of length, height, angles, surface, etc. The basic views in the technical drawing are the plan (top view), the elevation, which can be the front or side; and that of sections or cuts in two projections. The definition of scales helps the interpretation of these representations.
See also: Flowchart.
Types of technical drawing
Within the technical drawing some specific types are included, such as:
- Architectural technical drawing It encompasses different graphic representations, which serve to make plans for the future construction of buildings, houses, bridges, institutes, and so on.
- Mechanical technical drawing Its use is required for the realization of plans that represent parts of a machine, cars, airplanes, motorcycles and industrial machinery.
- Electrical technical drawing It serves to represent simple electrical installations, such as those of a dwelling, or rather complex, such as those of an industry. The latter usually clearly represent the location of the main board, of the switches and power sockets, among others.
- Geological technical drawing Used in the fields of geology and geography for the representation of the various layers of the earth through a symbology that allows to know the minerals found in that layer.
- Urban drawing It is used to represent in a functional way the development and infrastructure of cities and other urban centers, both those already existing or those that are in the project stage.
- Topographic drawing It is dedicated to capture in a plane the main characteristics of a land, such as height, slope, the presence of natural or artificial accidents, dimensions, contours.
- Technical drawing of sanitary facilities. It aims to represent all sanitary facilities: bathroom, shower, sink, etc. It also represents the location of external and internal pipes.
- Electronic technical drawing It is based on the representation of electronic graphics and drawings of current circulation circuits.
- Technical drawing of metal constructions. Represents plans for the construction of blacksmith structures.
The technical drawing can be translated into different supports (paper, acetate, passe-partout ), and is usually carried out on a board, with the help of elements such as rule T, square, bevel, bevel, compass, marker. Through the development of programs such as AutoCAD, for example, computer science has contributed greatly to the development of technical drawing.
- It can serve you: Drawing.
Lines used in the technical drawing
Within the branch of the technical drawing appears the line, a fundamental characteristic of it, important to illustrate the different objects. There are, then, different types of lines, among the main ones are:
- Guide line. It serves to signal a part of the object to which a note refers.
- Line of rupture. Used to represent a long piece which is shortened.
- Hidden line . Segmented lines that represent ovarian corners of objects that are hidden from perception.
- Flat cutting line. It is used to represent where an imaginary cut was made.