Engineering drawing tutorialsorthographic and sectional. Sectional views are views that are created by cutting into or through a part or assembly. Sections are used to clarify the interior construction of a part that can not be clearly described by hidden lines in exterior views. Sectional views 5full section in a full section, the cutting plane linepasses fully through the part. This is to avoid drawing in a foreshortened position. Sectioned technical illustrations are used to describe interior features of complicated assemblies. For a symmetrical object, a half sectional view is used to indicate both interior and exterior details in the same view. Fundamentals of drafting orthographic projection with sectional views objectives. Select the appropriate type of sectional view to show the hidden feature.
Today you and i will quickly take a look at the topic waec syllabus for technical drawing 20202021 download waec syllabus pdf 2020. The cut line is called a cutting plane, and can be done in several ways. Pdf engineering drawing 2 let 219 types of sectional. Fundamentals of drafting orthographic projection with. A model documentation section view is a projected view from an existing drawing view, where you use a section line to cut through the drawing view in order to reveal what is inside. Before you start the copy process, make sure you have drawn the hidden and center lines. Sectional views are used in engineering and architectural drawings. The engineering drawing, on the other hand, is not subtle, or abstract. Pdf created with fineprint pdffactory pro trial version. Orthographic projections indian institute of technology. The following slides will help show the several methods or types of section views. Assume that you had a bracket and cut it with a hacksaw along the line marked bb.
Engineering graphics with autocad 2011, 1e james bethune. Another important line type associated with a section view is the cutting plane line. Students are introduced to detail drawings and the importance of clearly documenting and communicating their designs. 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. It is considered poor practice to dimension to a hidden line and sectional views allow us to dimension the interior of a part without dimensioning to hidden lines. Engineering drawing important questions pdf file ed imp qusts please find the attached pdf file of engineering drawing questions pdf ed imp qusts link ed question bank uniti construct an ellipse.
Engineering drawing 2 let119 sectional views presentation. This view will show detail that is hidden inside the part or assembly in order to give dimensional information. Sections are used to clarify the interior construction of a part that can not be clearly. An engineering drawing is a means of clearly and concisely communicating all of the. Chapter 7 sectional views college of engineering and. A common use is to specify the geometry necessary for the construction of a component and is called a detail drawing. Identification of sections from engineering drawings. Welcome to the department of mechanical engineering, part of the college of science and engineering, serving the state and nation as a leading center of education, research, and innovation. You can use this form to make your own production drawings for class. Each one of these views shows two of the principle dimensions and can show only two.
Electrical drawing is an important engineering subject taught to electricalelectronics engineering students both at degree and diploma level institutions. Sections and sectional views engineering drawing joshua. We will transform the copied front view into the sectional view. Sectional views sectional views are used in technical drawing to expose internal. Usually, a number of drawings are necessary to completely specify even a simple component. If the thing we are drawing is quite simple, we can mark the hidden parts by a hidden outline. At latest count, the department has 43 active faculty, 56 staff members, 311 graduate students, 50 postdoctoral associates, research associates and visitors. The mechanical engineering branch, mechanical systems division, has been delegated. The front view or front elevation shows the width and height of the front of the object.
When the distance of the focus from the directrix is equal to 60 mm and eccentricity 23. If two or more parts are included within the same sectional view, each part must have. Sections are used to show interior details clearly. Sketching section views uses new features examples characteristics uses floor plan. Even in half sectional views, it is a good practice to omit the hidden lines. Usually, a number of drawings are necessary to completely specify even a. Lesson 1 manual drafting tools for engineering drawing 4 lesson 2 types of scales 1417 lesson 3 line and lettering 1837 module 2 projections lesson 4 dimensioning technique 3849 lesson 5 orthographic projections 5082 module 3 sectional views lesson 6 sectional view 83105 lesson 7 types of projections 106123. They are introduced to the american national standards institute ansi y14. An engineering drawing often needs to show features that we cant see because they are inside the object. Aligned elements in full and sectional views in full views, as well as in sectional views, certain violations of the rules of true projection are accepted as a good practice because they add to the clearness of the drawing. The following texts are the property of their respective authors and we thank them for giving us the opportunity to share for free to students, teachers and users of the web their texts will used only for illustrative educational and scientific purposes only. An engineering drawing is a type of technical drawing that is used to convey information about an object.
Rana continues to cover all the fundamental topics of the field, while maintaining its unique focus on the logic behind each concept and method. A primary reason for creating a section view is the elimination of hidden lines, so that a drawing. Objectives what are sectional views why do we draw sectional views sections and cutting plane lines hidden lines in sectional views lines behind the cutting plane section lining practices. An engineering drawing is a drawing or a set of drawings that communicates an idea, design, schematic, or model.
Contents of the lecture shape description shape generation sectional views auxiliary views. If the thing we are drawing is too complicated for this method. Jan 20, 2014 objectives what are sectional views why do we draw sectional views sections and cutting plane lines hidden lines in sectional views lines behind the cutting plane section lining practices. The front view or front elevation shows the width and height. It does not require an understanding of its creator, only an understanding of engineering drawings. A sectional view or section looks inside an object. Each engineering field has its own type of engineering drawings. Section lines are evenly spaced at any inclined angle that is not parallel to any existing edge line and should be visually distinct from the continuous lines that define the boundary of the sectional view. Let us take an civil engineeringarchitectural example of a house drawing. Sectional views are views from different sides of the object and different viewpoints and are used to quickly generate a 3d model of what the object will look like. 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.
The arrows at the end of the cuttingplane line indicate the direction of sight for the sectional view. The graphics of engineering design and construction may very. The illustrations below show the different entities generated by the viewsection command, and the terms used to refer to them. To extend the principle of orthographic projection for sectional views. The sectionlined areas are those portionsthat have been in actual contact with thecuttingplane.
The course content generally covers assembly and working drawings of electrical machines and machine parts, drawing of electrical circuits, instruments and components. The arrows at the ends of cuttingplane line point in the direction of sight for front section. Engineering drawings the blank engineering drawing form this blank template can be printed off the 2. Sectional views reveal hidden details in a mechanical drawing. From our basic engineering drawing knowledge, we can represent the details of an object fairly well through an orthographic projection drawing, indicating the dimension, shape, and size of the object.
What is the importance of sectioning in an engineering drawing. Engineering drawing, orthographic projection, sectional view. Home mechanical engineering college of science and. May 14, 2020 a section is used to show the detail of a component, or an assembly, on a particular plane which is known as the cutting plane. Engineering drawing course and in minimizing discrepancies.
A half sectional view is preferred for symmetrical objects. Be sure to also read the article on sections at this link sections and section views on engineering drawings. Jan 22, 2019 sectional views reveal hidden details in a mechanical drawing. Engineering drawing important questions pdf file ed imp. 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 technical drawing to help them prepare. By taking an imaginary cut through the object and removing. Section views sectional drawings are multiview technical drawings that contain special views of a part or parts, views that reveal interior features. The invisible features of the object are conventionally depicted by means of. The result is called a front section, or front view in section, since it replaces the front view in the drawing.
The topics covered include the multiview system of drawing, selection, and arrangement of orthographic views, auxiliary. If the thing we are drawing is too complicated for this method, instead of drawing hidden outlines we can make sectional views. All of the various types of sectional views can be drawn with autocad. Section view styles control the appearance of each of the listed entities. Fundamentals of computer aided design sectional orthographic. A section is used to show the detail of a component, or an assembly, on a particular plane which is known as the cutting plane. Apr 27, 2016 engineering drawing tutorials orthographic drawing with vertical section t 11. These views assume that a cutting plane has removed portions of the object represented by the drawing, displaying the appropriate section of the interior. After the drawing is done and labeled, it can be sent to a machine which will actually create a handheld mold of the object. Engineering drawing tutorialsorthographic and sectional views t 11.
Feb 19, 2017 sectioning gives an inside picture of a drawing. Normally a view is replaced with the fullsection view. Engineering drawing tutorials orthographic drawing with vertical section t 11. A cuttingplane line shows where object was cut to obtain the section view. May, 20 sectional views 5full section in a full section, the cutting plane linepasses fully through the part. Used to improve clarity and reveal interior features of parts. Let us take an civil engineering architectural example of a house drawing.
This will get you used to the look and feel of an engineering drawing. For a half section, the cutting plane removes only one quarter of an object. As figures shown, the cutting plane is a frontal plane and appears as a line in the top view. Dept of mechanical engineering and mechanics, drexel university good sectional view drawing practices different parts at different angles or patterns hatch spacing of about 11618 cutting plane line. They are introduced to standard paper sizes and drawing view conventions, which are major components of the. Sacramento city college engineering design technology. To see an animated version of this tutorial, please see the drawing and drafting section in mits engineering design instructional computer system. Sectional views are used in technical drawing to expose internal surfaces. To be aware of the basic conventions for sections and representing areas on sections outlined in bs iso 12840 and bs iso 12850. Ce 100 civil engineering drawing sessional lab manual. Engineering drawing pdf book free download agrimoon. Cross hatching in the section view shows the solid surface of the object which were cut through to produce the section. Engineering graphics is a set of rules and guidelines that help you create an engineering drawing.
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