Basic types of lines in technical drawing pdf

The person who will read drawings have to learn what they mean. Manual pencil drafting, drafting in ink, and computeraided. By using pencils with soft leads to draw dark and thick lines. D identifliilre types used on engineering drawings. 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. It shows and describes clearly and accurately the information required to build or manufacture a product. Mar 18, 2014 this video will help you to understand the difference between different types of lines used in technical drawing. Lines are always used to construct meaningful drawings. Pdf engineering drawing for beginners researchgate. It provides an industry perspective of the basic concepts and principles. Technical drawing dimensioning types cobanengineering. Hello friends, in this video we are going to discuss about the types of lines and its apications which are the basics of the engineering graphics.

Ppt engineering drawing powerpoint presentation free. Usually they have a slight barb, much like a fishhook. It is used for drawing lines and connecting points. The standard drawing sheet sizes are arrived at on the basic principal of. Line types used in technical drawing are used for different purposes to provide specific information to the people looking at the drawing. Hatching we can create value by using linear hatching. Dimensions are classified into the following types. Correct usage of this alphabet of lines is essential whether you use traditional drafting methods or cad. Technical drawing offers prerequisite knowledge and skills for a number of the technical and vocational areas of work. Line types many types of lines are used to create art.

Drafting students or those reading the drawings have to learn what they mean, just as one learns a new language. A dimension is a numerical value expressed in appropriate units of measurement and used to define the size, location, orientation, form or other geometric characteristics of a part in other words, indicating on a drawing, the sizes of the object and the other details. Scholars learn about the engineering drawing process from visualization to implementation. Learning mechanical drawing is similar to learning another language. Rulers come in two types according to the design of their edge. Technical drawing free engineering drawing software. Technical drawing is a form of design communication based on line symbols recognized and understood worldwide.

A round bar is shown as a circle in one view and a rectangle in the other. Basic types of lines used in engineering drawings wisc. Technical drawing is a universal language for effective communication in the manufacturing industry and is therefore an important subject in the tvet programme at the senior high school. Rulers used in technical drawing are usually made of polystyrene. In this article, you will learn about the types of lines used in engineering drawing. Objectives at the end of this section you should be able to. If the isometric drawing can show all details and all dimensions on one drawing, it is ideal. Engineering drawing example 3 types of drawings all drawings artistic technical sketches conceptual diagrams design technical drawings technical engineering simulated perspective multi view orthographic. Each type of line has a very precise symbolic meaning. An introduction to the styles and importance of technical drawing slideshare uses cookies to improve functionality and performance, and to provide you with relevant advertising. Orthographic projection of points, lines, planes and solids. This video will help you to understand the difference between different types of lines used in technical drawing.

Dimensions and types of dimensioning systems complete guide. Jan 21, 2018 hello friends, in this video we are going to discuss about the types of lines and its apications which are the basics of the engineering graphics. Artistic drawings range in scope from the simplest line drawing to. Line types are also a language type to communicate between technical people. Apr 18, 2016 different types of lines in engineering drawing more. The mechanical engineering branch, mechanical systems division, has. T h is h a n d boo k is pr epa r e d w ith the p r. An electrical drawing is a type of technical drawing used to define the requirements for engineering productscomponents. For most engineering drawings two thicknesses of lines are mainly required, a thick and thin one. In art, lines may be the path made by a pencil or the stroke of a paintbrush. You can also view this article in slides and download in pdf.

If you are using a pencil or felttip marker, press lightly when drawing the construction lines to produce a thin or light line. 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. Crosshatching crosshatching uses layers of hatching placed at. However, it is very important that the drawing produced to be accurate and clear. Visible lines represent features that can be seen in the current view meaning of lines hidden lines represent features that can not be seen in the current view center line represents symmetry, path of motion, centers of circles, axis of axisymmetrical parts dimension and extension lines indicate the sizes and location of features on a drawing.

Dec 3, 2017 line types engineering drawing wikipedia. Horizontal and vertical construction lines are lightly drawn to outline the basic shape of the main face of the part. To prepare a drawing, one can use manual drafting instruments figure 12 or computeraided drafting or design, or cad. It introduces the basic concepts of technical drawing using a computer assisted drafting cad program. 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. In this highly interactive object, learners associate basic line types and terms with engineering drawing geometry. Surroundings and sides of the matters outlines of the edges, end of the screws, b. In art, lines may be the path made by a pencil or the. However, the initiatives have also not had significant impact on skill. The following slides will help show the several methods or types of section views. Proper dimensioning will help to manufacturers, engineers etc. Basic types of lines used in engineering drawings by kelly curran glenn sokolowski.

Every line is drawn at different thickness and darkness to express contrast as well as importance. Line types identification purpose 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. In this article, we will learn about what is dimensions and types of dimensioning systems used in engineering drawings. Mcq on engineering drawinggraphics royal mechanical. The cut line is called a cutting plane, and can be done in several ways. Technical drawing lines are used for different purposes to provide specific information for designers, manufacturers, etc. The gsfc engineering drawing standards manual is the official source for the requirements and interpretations to be used in the development and presentation of engineering drawings and related documentation for the gsfc. Finished drawing will be emailed to the instructor and will be maintained in your. The basics of mechanical drafting begin with understanding the concept of orthographic projection.

Technical drawing, drafting or drawing, is the act and discipline of composing drawings that visually communicate how something functions or is constructed. Hence, technical drawing is often referred to as a. Types of lines basics of engineering graphics engineering. Technical drawing is concerned mainly with using lines, circles, arcs etc. Technical drawing tutorial doug smith memorial university of newfoundland. The basic drawing standards and conventions are the same regardless of what design tool you use to make the drawings. A dimension is a numerical value expressed in appropriate units of measurement and used to define the size, location, orientation, form or other geometric characteristics of a part. If a client of yours is having difficulty visualizing a design, what type of drawing would be the easiest to understand. Hatching pressing harder or using a bigger nib or marker, also gives a darker appearance. It is a language of communication between architects and engineers, usually to convey information about the object. By analyzing different aspects of 1996 technical drawings included in the fyp about different scopes, it is hoped to be.

In learning drafting, we will approach it from the perspective of manual drafting. Ppt engineering drawing powerpoint presentation free to. It provides an industry perspective of the basic concepts and principles that are used in the design and drafting industry. Home mechanical engineering college of science and.

For general engineering drawings, the types of lines recommended by the bureau of indian standards shown in table 2 must be used. The powerpoint also covers drawing standards, lettering styles and strokes, and basic line types. It allows you to visually play with design lines and features without the need to make costly samples. To equip students with basic skills required in engineering drawings, electrical. Mention types of drawing explain the difference between different types of drawings mention some of the applications of technical drawings 1. Drawing just like photography is one of the basic forms of visual communication.

Technical drawings provide clear and accurate information how an object is to be manufactured. An engineering drawing, a type of technical drawing, which is used to fully and clearly define requirements for engineered items with scales. The general recommendations are that thick lines to be twice as thick as the thin lines. The fundamentals of design drafting a students guide. Lines that are not parallel to these axes will not be of their true length. Fundamentals of technical drawing technical drawing.

Correctly made, arrows are about 18 to 316 in length, and are about three times as long as they are wide. Line styles are used to clarify important features on drawings, some examples are as shown below. Drawing is the art or technique of representing an object or outlining a figure, plan or sketch by means of lines. Good quality technical drawings are imperative for the industry, yet many people struggle with their drawing abilities and often lack confidence in their skills. To make your drawing look clean, use the same style throughout your drawing or sketch. It is a basic requirement and learned early in drafting instruction. Hatching the closer the lines are, the darker the value. A read is counted each time someone views a publication summary such as the title, abstract, and list of authors, clicks on a figure, or views or downloads the fulltext. Graphic method of representation is a basic natural form of communication of ideas that is universal and timeless. Dimensioning rules is very important for drawing standards. Proper dimensioning requires engineering judgment and thorough knowledge of the practices and requirement of the production department. Drawing is a form of visual art in which a person uses various drawing instruments or software to produce 2d or 3d objects.

Fashion drawing is an excellent method of developing and realising your design ideas. Section 11 general principles of dimensioning on technical drawings. 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. If youre looking for a free download links of technical drawing with engineering graphics 15th edition pdf, epub, docx and torrent then this site is not for you. Basic technical drawing spencer, henry cecil, dygdon, john thomas, novak, james e. The computer keeps a record of all dimensions in the drawing changes to drawing can be made easily editing processes include the ability to copy, move, rotate, mirror and erase drawing parts drawing storage is on a hard drive, memory stick, cd, dvd or floppy disk rather than in. A drawing that displays technical information to the reader through specific visuals, directions, notes, etc a good technical drawing should be informative, clear, neat, unambiguous and not cluttered. Technical drawing autocad texts how to plan drawings cnc internet magic blog. Arrowheads are placed at each end of dimension lines, on leader lines, etc. You should follow the same basic principles in any sketching or drawing. Object or visible lines thick dark line use to show outline of object, visible edges and surfaces.

Technical drawing is essential for communicating ideas in industry and engineering. Technical drawing with engineering graphics 15th edition pdf. 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. These lines define the shape of the object portrayed and are the outermost outline of the object. The content presented in the fundamentals of design drafting text is written to assist students in learning and developing a core knowledge of designdrafting and skillbuilding procedures. A section view is a view used on a drawing to show an area or hidden part of an object by cutting away or removing some of that object. The computer keeps a record of all dimensions in the drawing changes to drawing can be made easily editing processes include the ability to copy, move, rotate, mirror and erase drawing parts drawing storage is on a hard drive, memory stick, cd, dvd or floppy disk rather than in a drawing folio. The purpose of an electrical drawing is to clearly and accurately capture all geometric features of a productcomponent so that a manufacturer or engineer can. Key to successful drafting is to have a good technical knowledge of these various line characteristics to understand where and when to apply them in technical drawing. Graphics, the details of various objects are drawn by different types of lines. To make the drawings easier to understand, people use familiar symbols, perspectives, units of measurement, notation systems, visual styles, and page layout. The alphabet of lines in technical drawing lines in technical drawings are part of a specialized graphic language that is standardized throughout industry. Drawing is a graphic representation of a real thing, an idea, or a proposed design why graphic representation. If all lines on a drawing were equally thick, the drawing is confusing and difficult to interpret.

Lines lines is one important aspect of technical drawing. Textbook of engineering drawing, second edition xfiles. Engineering drawing example 3 types of drawings all drawings artistic technical sketches conceptual diagrams design technical drawings technicalengineering simulated perspective multi view orthographic. The mechanical engineering branch, mechanical systems division, has been delegated. Following are the different types of lines used in engineering drawing.