Click here to download the drawing equipment worksheet and printable version of this page click here to find my essential list for graphics or technical drawing students. The first is a drawing done without instruments, known as a sketch. In drawing lines are with dark it is representing the actual image of drawing. Line types used in technical drawing are used for different purposes to provide specific information to the people looking at the drawing. In this video i present the most uses lines in eng drawing and where those are used. Instruments include graphite pencils, pen and ink, various kinds of paints, inked brushes, colored pencils, crayons, charcoal, chalk, pastels, various kinds of erasers, markers, styluses, and various metals such as silverpoint. A technical pen will normally be available in a range of line widths, sometimes conforming to iso standards. Traditional tools are used to make technical drawings by hand, and it takes practice and repetition to become proficient at their use. Each line type is designated by a letter, and given a type style these are explained in the table below. Jan 08, 2017 i guess like any type of technical drawing you need to have an understanding of what device youre trying to illustrate, its functions, and the space creators need to understand while assembling. Surroundings and sides of the matters outlines of the edges, end of the screws, b. This module unit involves ability to select, use, care and maintain drawing equipments and materials, construct lines and geometric shapes, use of scales and grids in perspective drawings, draw surface developments and intersection of solids, draw architectural environments, convert pictorial drawings to orthographic views and vice versa.
Mostly they are for actual drawing, but some serve as symbols to represent things happening in the drawing itself or direct you to something happening in real life. There are many types of lines used in technical drawing. The alphabet of lines in technical drawing lines in technical drawings are part of a specialized graphic language that is standardized throughout industry. It is a basic requirement and learned early in drafting instruction. Drafting students or those reading the drawings have to learn what they mean, just as one learns a new language. Mar 08, 2017 a structural drawing is a type of technical drawing which depicts the design and working drawings for building as well as technological structures.
This has become very necessary as several aspirants of the 20202021 waec examination have been trooping into our website for waec guide and asking us several other questions concerning the syllabus for waec. The person who will read drawings have to learn what they mean. It is used as a boundary line of the drawing sheet and title block lines at the bo. Line thickness if all lines on a drawing were equally thick, the drawing is confusing and difficult to interpret, as the outlines do not stand out from the dimension lines, with small objects made obscure from the intersection of many thick lines. Some instruments are manual, while others are computerbased. As a relatively old tool for writing, pencil developed in time and different types of pencils were invented for different uses. Structural drawings are primarily concerned with the loadcarrying members of a structure. Early humans felt a need to represent the world hunting scenes to their peers. It includes a plan or set of plans for the building or other structures. A ruler with a straight edge can be used with lead pencils and felt pens, whereas when a technical pen is used the edge must be grooved to prevent the spread of the.
What is the importance of different types of lines in. Contractors, estimators, tradesmen and builders rely totally on technical drawings for the. This is particularly because 2h contains a very light amount of lead. In art, lines may be the path made by a pencil or the. Just like curvy lines they go in many different directions. Mention types of drawing explain the difference between different types of drawings mention some of the applications of technical drawings 1. Instruments used in engineering drawing its uses and importance. Diagonal lines are slanted they look like they are leaning over.
Graphite pencils standard everyday pencils with a core of clay and graphite of clay and graphite and a casing of wood. Technical drawing is a universal language used for communication among technical people. This module unit involves ability to select, use, care and maintain drawing equipments and materials, construct lines and geometric shapes, use of scales and grids in perspective drawings, draw surface developments and intersection of solids, draw architectural environments, convert pictorial drawings to. Drawing a perpendicular to a line from a point, inabove away from the end of, the. In this highly interactive object, learners associate basic line types and terms with engineering drawing geometry. Drawing is a form of visual art in which a person uses various drawing instruments or software to produce 2d or 3d objects. An mcb or miniature circuit breaker is an electromagnetic device that embodies complete enclosure in a molded insulating material. In other words, lines in technical drawing communicate with you. Technical drawings provide clear and accurate information how an object is to be manufactured. Today you and i will quickly take a look at the topic waec syllabus for technical drawing 20202021 download waec syllabus pdf 2020.
Technical drawings are graphic and technical communication tools. The thickness of the lines must be chosen according to the type and size of the drawing from any of the six groups given in table 1. Dimension, projection, leader, hatching type lines must be drawn thin and continuous. Drawing is a form of visual art in which a person uses various drawing instruments to mark paper or another twodimensional medium.
They have many levels of darkness, which are achieved with different ratios of graphite and clay. The following are the types of lines used in engineering graphics. Mcb miniature circuit breaker, construction, working, types. Waec syllabus for technical drawing 20202021 waecnigeria. The guidelines for these drawings are quite strict and can require a high level of technical skill to accomplish. A structural drawing is a type of technical drawing which depicts the design and working drawings for building as well as technological structures. Technical drawing instruments are the tools used by professional and student drafters to render the precision graphics needed to manufacture a product or structure. The 14 different types of pencils every drawing set needs.
Technical drawings represent the exact shape, dimensions and composition of an object. Line features vary not only by width but also by how they are graphically represented in a drawing. The use of line symbols enables engineersdesigners to express features of designed products clearly and accurately. Objectives at the end of this section you should be able to. Continuous thick lines are used to indicate visible outlines. This is the line type you would use for dimension lines, projection lines, intersection lines, and headers. This pencil type is great for any technical work that involves making lines that are easily erasable. Aug 30, 2017 technical drawing instruments are the tools used by professional and student drafters to render the precision graphics needed to manufacture a product or structure.
Technical drawing is a form of design communication based on line symbols recognized and understood worldwide. Some people still prefer to do their technical drawing that way, and these pens have found other fans, for drawing and writing. Technical drawing, drafting or drawing, is the act and discipline of composing drawings that visually communicate how something functions or is constructed technical drawing is essential for communicating ideas in industry and engineering. Limits or boundaries of partial or interrupted views.
In engineering drawing required lines are should be maintain maximum thickness. Jan 22, 2018 in this video i present the most uses lines in eng drawing and where those are used. Types of charts and their uses are important for your business or daily assignments. It is a language expressed in terms of graphic illustrations which convey the idea of shape, size and other features of engineering components used in the manufacturing and construction industries. Technical drawings, graphic images and sketches can be created using a variety of instruments, ranging from traditional tools such as pencils, compasses, rulers and a variety of triangles as well as by. D identifliilre types used on engineering drawings. Its also used for hatching and outlines of revolved sections. It is not very hard but important so eg is not hard just take it easy.
Drawing just like photography is one of the basic forms of visual communication. The following chart shows technical drawing lines that describe a piece of machinery with a swinging arm. The second is a drawing done with instruments, known as a final drawing. The extension lines for dimensioning should run from the outlines without leaving a gap and extend beyond the dimension lines. It is common for artists to use various line drawings as a warmup, oftentimes giving them fresh ideas on how to begin working on a longer study, which may end up a final work of art. Jan 21, 2018 the types of lines and its apications which are the basics of the engineering graphics. The main function of an mcb is to switch the circuit, i. Line symbols used in technical drawing are often referred to as alphabet of lines.
Drawing is the art or technique of representing an object or outlining a figure, plan or sketch by means of lines. Sketch final drawing artistic drawings convey an idea, feeling, mood or situation. Make sure you understand the use of the cutting plane line to show the section. Drawing is used to record objects and actions of everyday life in an easily recognizable manner. It shows and describes clearly and accurately the information required to build or manufacture a product. Limits or boundaries of partial or interrupted views type lines are drawn as continuous, thin, wavy, freehand lines to represent limits or. The appearance of technology gradually led humans to develop another use for drawing. Technical drawing is essential for communicating ideas in industry and engineering. Zigzag lines are made of a combination of straight diagonal, vertical, and horizontal lines. It is also a great option for those who just begun to draw and wish to add very light shades to their drawing. The names of different lines and their uses to be matched with the correct thickness and shade. Straight edge can be used with lead and felt pens, whereas when technical pen is used the edge must be grooved to prevent the spread of the ink. Depending on the type of patent being sought, those wishing to get things patented are required to submit a technical drawing with their application. Examples of good and poor drawing technique for lines and arcs using traditional tools.
Drawing sheet layout title block scale line styles dimensioning text styles symbols printing and plotting standards archive library fundamentals iso standards current trend drawing sheet layout template note that some companies have their own drawing template, which inserts draftingwhich inserts draftingstandard standard. Common types like line charts, bar or pie charts can improve clarity of coursework or projects. Different types of lines and their uses bd easy learn. Rulers come in two types according to the design of their edge. Technical drawing lines are used for different purposes to provide specific information for designers, manufacturers, etc. Measure lines, backside section lines, implied axis lines, to state the code of the planes, at diagonal lines which are used to state plane surface, intersection, leader, hatching. Learn vocabulary, terms, and more with flashcards, games, and other study tools.
Line types are also a language type to communicate between technical people. D identif liilre types used on engineering drawings. Engineering drawing different types of lines and their uses. Types of lines basics of engineering graphics engineering. Once again, you are free to make up your own line definitions, but it is recommended that you put a note on the drawing with their meaning. Continuous thin lines are used for the dimensions line, leader lines, fictitious line, hatching lines hatching lines when drafting of model drawing to show as a sectioning and also for the imaginary intersection of surfaces, revolved sections, adjacent parts, tangent bend lines and fold, when representing the circular section then thin lines. These are engineers, technicians, designers, builders, etc. Rulers used in technical drawing are usually made of polystyrene. Line types and their application there are technical drawings of different lines, whose application for underwriting certain elements is foreseen. Each type of line has a very precise symbolic meaning. In this section you will be able to recognise and interpret different line types, and the need for variation in thickness used on engineering drawings. Basic types of lines used in engineering drawings by kelly curran glenn sokolowski.
This contour drawing gives an indication of general physical features and folds in clothing. Basic types of lines used in engineering drawings wisc. Hence, technical drawing is often referred to as a universal language understood readable by anyone regardless of the language they speak. All of the red bent arrow lines with notes are the leaders. For such items, use detail or detail assembly drawings.
Correct usage of this alphabet of lines is essential whether you use traditional drafting methods or cad. The lines are commonly used in drawing with specified reason and lines are different types. What are the types of lines in engineering drawing. Line drawings present themselves in a number of ways including outlines of objects, movement or density of objects and even erasing. Technical drawing, drafting or drawing, is the act and discipline of composing drawings that visually communicate how something functions or is constructed. To make the drawings easier to understand, people use familiar symbols, perspectives, units of measurement, notation systems, visual.
This type is also used to draw outlines of adjacent and revolved sections. It became a way to convey technical thought archimedes, leonardo da vinci. Fundamentals of technical drawing technical drawing. Modifying drawing types are altered item, selected item, and modification drawings. A thin line is used for hatching, lines, short centre lines, dimensions and projections. These instruments take many forms because of the variety of lines and graphics needed for designs. As a relatively old tool for writing, pencil developed in time and different types of pencils were invented for different uses graphite pencils standard everyday pencils with a core of clay and graphite of clay and graphite and a casing of wood. And the following list shows the significance of each of these lines. The article will show you the top 10 common types of charts and their tips to use. These drawing types are not used for items made from raw or bulk materials, items purchased in bulk lengths, or such semiprocessed items as blank panels, castings, electronic equipment drawers, etc.
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