In engineering drawing, we make use of different lines and line styles to. Two projection lines which extend from the part and show the beginning and end of the actual dimension. The mechanical engineering branch, mechanical systems division, has. Technical drawing lines are used for different purposes to provide specific information for designers, manufacturers, etc. Objectives at the end of this section you should be able to. Each type of line has a very precise symbolic meaning. For example, 1 100 is a typical scale used for civil engineering drawings. Shoaf space task group engineering division of the proposed. There should also be a distinct contrast in the thickness of different kinds of lines, particularly between the thick lines and thin lines. And the following list shows the significance of each of these lines.
Mech2400 5400 engineering drawings lecture introduction. Means of egress exits, escape strategies and occupant loads. There are various types of lines recommended by bureau of indian standards, s. For general engineering drawings, the types of lines recommended by the bureau of indian standards shown in table 2 must be used. They can be delicate and thin like a spiders web, or thick and bold like a row of telephone poles. Section 11 general principles of dimensioning on technical drawings. Line types used in technical drawing are used for different purposes to provide specific information to the people looking at the drawing. The first is a drawing done without instruments, known as a sketch. We appear to interpret this scene accurately, and with little effort. They are projected from the part drawing and show the dimension limits. You can create several types of dimensions for a variety of object types in many orientations and alignments. You can control the appearance of dimensions by setting up dimension styles, or by.
A drawing can be done using freehand, instruments or computer methods. The second is a drawing done with instruments, known as a final drawing. Composition of graphic language the language is known as drawing or drafting. Hajee mohammad danesh science and technology university. A block drawing usually works in conjunction with a textbook. Continuous thick lines are used to indicate visible outlines. About the types of dimensions autocad 2016 autodesk. Drawing just like photography is one of the basic forms of visual communication. Engineering drawingmechanical engineering interview. Sketch final drawing artistic drawings convey an idea, feeling, mood or situation. This standard was prepared to define the accepted drawing types used to establish engineering requirements. Drafting students or those reading the drawings have to learn what they mean, just as one learns a new language. Pdf engineering drawing for beginners researchgate. If the outline of the object has 45 degree lines, 30 or 60 degree lines should be used.
An engineering drawing is a type of technical drawing that is used to convey information about an object. The following are the types of lines used in engineering graphics. It primarily consists of sketching the actual component, for example, a machine, with its exact dimensions. Notice on the above drawing that the largest dimension is placed on the outside of the smaller dimensions. The basic types of dimensioning are linear, radial, angular, ordinate, and arc length. Assemblies with several parts should be lined with varying angle section lines. Dimension lines engineering drawing joshua nava arts. Graphic language use lines to represent the surfaces, edges and contours of objects. Line types are also a language type to communicate between technical people. Mechanical engineering what will you learn in this course. This type of drawing illustrates the main parts and shows way the parts connect.
Technical drawing is a language of lines, quite literally because the reader of the drawing needs to rely on the fact that every line on the object visible as an edge is shown unless clearly stated, so if something is missing it throws the sense out and introduces doubt. 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. Engineering drawing, is the most important aspect of mechanical engineering, as it is the fundamental need to develop the design and assembly of a machine. Work on this standard considered the types of engineering drawings most frequently used by business, industry, and government com. It is used as a boundary line of the drawing sheet and title block lines at the bo. Textbook of engineering drawing, second edition xfiles. Section lining line placement lines should never be parallel or perpendicular to the object lines. If the thing we are drawing is quite simple, we can mark the hidden parts by a hidden outline. In drawing lines are with dark it is representing the actual image of drawing. Engineering drawingtypes of lines,lettering and dimensioning. Use the dim command to create dimensions automatically according to the object type that you want to dimension. 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. Types of lines engineering drawing engineering graphics. Structural lines structural lines are the lines that hold a design together.
In this article, you will learn about the types of lines used in engineering drawing. These rules may vary slightly for different regions. Drawing is used to record objects and actions of everyday life in an easily recognizable manner. Powered by create your own unique website with customizable templates. Engineering drawing text book by nd bhatt pdf latest. The lines are commonly used in drawing with specified reason and lines are different types. Drawing section views middlesex county vocational and. Appendix a summarizes the types and layouts of the blocks of interest.
Dimensions provide the information needed to specify the size and location of every feature on the object. In engineering drawing required lines are should be maintain maximum thickness. Each type is defined by general description, application guide lines, and specific content requirements. Technical personnel in any indus try including craftsmen. What is the importance of different types of lines in. The problem of identifying different types of blocks within the drawing in. A common use is to specify the geometry necessary for the construction of a component and is called a detail drawing. Object or visible lines thick dark line use to show outline of object, visible edges and surfaces. Information extraction from scanned engineering drawings.
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 art, lines may be the path made by a pencil or the. A short series of lectures on engineering drawing as part of engg1960. The person who will read drawings have to learn what they mean. An engineering drawing, a type of technical drawing, is used to fully and clearly define requirements for engineered items. Engineering drawing different types of lines and their. Pdf a compressed handbook designed for the students of engineering disciplines for learning the basics of engineering drawing. Basic types of lines used in engineering drawings wisc. This lab manual was prepared with the help of beginners guide to engineering drawing. Each part appears in a block format that has marks for. Some of the lines here, such as contours and creases, reveal only geometry. You will learn how industry communicates technical information.
Engineering drawing list of high impact articles ppts. D identifliilre types used on engineering drawings. Title, reference and mmc marinette marine corporation number blocks. Hello, everyone created by, govind b nadare be in mechanical engineering one year experience in bajaj auto ltd. If the thing we are drawing is too complicated for this method. Click on the link below to download the book click here download free. 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. Technical drawings represent the exact shape, dimensions and composition of an object. Engineering drawing and sketching introduction one of the best ways to communicate ones ideas is through some form of picture or drawing. Structural lines come in a variety of types with different characteristics and qualities. All general text in the drawing shall be dtext andis to be horizontal and upper case. An engineering drawing often needs to show features that we cant see because they are inside the object. Usually, a number of drawings are necessary to completely specify even a. Correct usage of this alphabet of lines is essential whether you use traditional drafting methods or cad.
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. Engineering drawing is a two dimensional representation of three dimensional. Ce 100 civil engineering drawing sessional lab manual. The alphabet of lines in technical drawing lines in technical drawings are part of a specialized graphic language that is standardized throughout industry. The purpose of this guide is to give you the basics of engineering sketching and drawing. Types of lines engineering drawing by srinivas btech tutorials klasspm duration. Different line types are used to indicate visible, hidden and symmetry lines. Engineering drawing, also called technical drawing and engineering graphics, is the. People may use a block drawing to show a basic description of a unit and the units functions. The graphics of engineering design and construction may very. In this highly interactive object, learners associate basic line types and terms with engineering drawing geometry.
Only use lower case lettering for abbreviations for engineering units of measure. I have amalgamated the definitions from the engineering drawing supplement and the construction drawing supplement together. Dimensioning engineering drawings an engineering drawing must be properly dimensioned in order to convey the designers intent to the end user. Engineering drawing types life safety or building plan bp the purpose of the bp drawings is to outline the building with regards to fire safety and declare systems that are going to be used for protection in the building. They are type b lines thin, continuous and straight. Exact thickness may vary according to the size and type of drawing. Basic types of lines used in engineering drawings by kelly curran glenn sokolowski. You can also view this article in slides and download in pdf.
Orthographic projection of points, lines, planes and solids. Where there is a limited space for dimensioning, the. Engineering drawings the blank engineering drawing form this blank template can be printed off the 2. Line types and thicknesses engineering drawing joshua. Engineering drawing, most commonly referred to as engineering graphics, is the art of manipulation of designs of a variety of components, especially those related to engineering. Figure 2 shows the typical navy title block with various information fields. 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. By the end of this chapter, you will be able to create a technically correct orthographic. Putting the line types, line weights and line type scales together, we get the following line type definitions to use in our drawings. It is a general principle of engineering drawings that they are projected using standardized, mathematically certain projection methods and rules standardsconventions.
369 56 1378 298 551 894 970 562 1290 1079 876 506 1301 223 960 601 246 1361 71 581 627 390 216 334 188 861 1288 601 465 1409 1279 245 1338 1552 843 982 158 573 1273 591 216 562 327 325 1354 1020 1416 944