Assume that you had a bracket and cut it with a hacksaw along the line marked bb. Copy view to be cross sectioned start the process by copying the front view third angle projection of the object. Identification of sections from engineering drawings. Notice how much easier it is to read and understand.
The imaginary cutting plane is projected on a standard view so that the sectional view with orthographic representation is obtained as shown in fig. To be aware of the basic conventions for sections and representing areas on sections outlined in bs iso 12840 and bs iso 12850. Sectional views are used in technical drawing to expose internal surfaces. Dept of mechanical engineering and mechanics, drexel university sectional views these are views that show internal features such as cuts, holes, step cuts as orthographic views. The appearances of views may be of as being projected onto planes that form a sixsided box around the object. For environmental health science students engineering drawing wuttet taffesse, laikemariam kassa haramaya university in collaboration with the ethiopia public health training initiative, the carter center, the ethiopia ministry of health, and the ethiopia ministry of education 2005. 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.
Must already know how to read multiview drawings and have an understanding of projection and rotation of monges principle views, and. Sections and section views on engineering drawings read more. An engineering drawing is a drawing or a set of drawings that communicates an idea, design, schematic, or model. Cross hatching in the section view shows the solid surface of the object which were cut through to produce the section. In section view drawings, hidden line representation is omitted in that part of the view with the section lining.
The information in this book is equally applicable to any cad application or manual drawing. Although six different sides can be drawn three sides of a drawing give enough information to make a threedimensional object. Of these, only one candidate produced a noteworthy answer. Sometimes it is necessary to cut a part or assembly to reveal geometry or fits on the inside of a part or assembly. Draw the development for the top part of the pyramid. Half sections are used mainly for symmetric objects or assembly drawings. This is a modern rechargeable torch and it is important for the manufacturer to be able to see the internal parts. The cut line is called a cutting plane, and can be done in several ways. Drawing office management and organisation product development and computer aided design cad applications principles of first and third angle orthographic projection linework and lettering three dimensional illustrations using isometric and oblique projections drawing layouts and simplified methods sections and sectional views geometrical constructions and tangency loci applications true. Contents of the lecture shape description shape generation sectional views auxiliary views. For example, the magnetic force torch, shown below. Other views such as, detailed views, should be added through the insert drawing view drop down menu.
Jan 22, 2019 sectional views reveal hidden details in a mechanical drawing. 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. Crosssectional views page 2 of 6 the diagonal lines on the section drawing are used to indicate the area that has been theoretically cut. The drawing shows its name, wall bracket within the title block. The following slides will help show the several methods or types of section views. A candidates final result is determined by combining the scores obtained in paper i and paper ii with the marks earned in a cad portfolio compiled during the twoyear course.
A section drawing, section or sectional drawing shows a view of a structure as though it had been sliced in half or cut along another imaginary plane. Projections behind every 2d drawing of an object is a. Jan 15, 2019 section drawing designing buildings wiki share your construction industry knowledge. Drawing space drawing space title block d d c c c border lines 1. Sectional views are used in engineering and architectural drawings. Delineates two or more uniquely identified parts in separate views or in separate sets of views on the same drawing. An engineering drawing often needs to show features that we cant see because they are inside the object. Students are introduced to the concept of section views.
Engineering drawing, orthographic projection, sectional view. When sectional views are drawn, the part that is cut by the cutting plane is marked with diagonal or. Then imagine removing the material from the front of this plane, as shown in figure 17. In view d, the orthographic section view of section aa is placed on the drawing instead of the confusing front view in view a. B a full section in the front view but with hidden lines inappropriately included in the background. Sectional views in engineering drawings for mechanical engineers. According to international drawing standards, cutting lines are not always required for section views. 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. Chapter 7 sectional views college of engineering and.
It does not require an understanding of its creator, only an understanding of technical drawings. The result is called a front section, or front view in section, since it replaces the front view in the drawing. We will transform the copied front view into the sectional view. Engineering drawing text book by nd bhatt pdf latest edition. Engineering drawing course and in minimizing discrepancies. Let us take an civil engineering architectural example of a house drawing. A half section is a view of an object showing onehalf of the view in section, as in figure 19 and 20. The diagonal lines on the section drawing are used to indicate the area that has been theoretically cut. Engineering drawing tutorials orthographic drawing with. The part cutaway view creates a section in a pictorial isometric, trimetric, or dimetric view.
Drawing is used to record objects and actions of everyday life in an easily recognizable manner. Statistical information the written examination consists of two papers, each of three hours duration. Shape description geometric shapes are seen according to view they are regarded set of primitives used to conceptualize the complex shapes by addingsubtracting the. 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.
Type y a4 only orientation of drawing sheet title block sheet size c min d. International programmes of engineering hatching lines hatching lines are thin line type b, and are normally drawn 45o to. Textbook for vocational training engineering drawing. A sectional view must show which portions of the object are solid. Here you can download engineering drawing book by n. Download engineering drawing text book by nd bhatt pdf latest edition for b. Shoaf space task group engineering division of the proposed lunar lander to be used with an advanced version of the mercury spacecraft. Question 2 limits and fits this question was chosen by 3 candidates only. As figures shown, the cutting plane is a frontal plane and appears as a line in the top view. A a standard orthographic drawing of the hub showing the front and top views. Improved placement of views on types of drawings samples to prevent unnecessary rework of drawings at a later date. You can create assembly cutaway views to expose the inner details of pictorial such as isometric, trimetric, and dimetric drawing views. Engineering drawing view, lines, plane, projection, fig. Could have been done with two regular views and a sectional view replacing the end elevation.
Dec 28, 2015 full sectional view is used to show height or depth of hole or other shapes. It is cut by a sectional plane perpendicular to vp and inclined at 450 to hp. To obtain a sectional view, a cutting plane is assumed to be passed through the part a. Dimensions wall bracket drawing shows dimensioning reasonably well located with the exception of the plan view which has three dimensions located within the. Expertise in reading a drawing can be obtained by projecting one or more views from the given views or by converting the views in to sectional views and analyzing the views. A cuttingplane line shows where object was cut to obtain the section view. The primary view types available in the view type menu illustrated in figure below are.
Usually the word scale is used for an instrument used for drawing straight lines. Drawing views and orthographic projection i third angle projection. A designer can use this technique to show the interior of a design. Drawing just like photography is one of the basic forms of visual communication. The mechanical engineering branch, mechanical systems division, has been delegated. Fundamentals of drafting orthographic projection with sectional views objectives. When an object is solid or the interior simple the invisible parts can be represented satisfactorily by dotted lines, but if there is much interior detail, especially if the object is made in more than one piece, the dotted lines become confusing and hard to read. Sectional drawing if the drawing cannot fully show the interior detail of object, a sectional view slicing through the object is drawn to reveal the interior detail. Sometimes hidden lines, which are necessary for clearness, should be drawn.
Is a single drawing prepared to describe parts usually related to one another. Another way of looking at a sectional view is to picture an object being cut by a. These views assume that a cutting plane has removed portions of the object represented by the drawing, displaying the appropriate section of the interior. Which views should one choose for a multiview drawing. Good sectional view drawing practices different parts at different angles or patterns hatch spacing of about 11618 cutting plane line. The arrows at the ends of cuttingplane line point in the direction of sight for front section. To extend the principle of orthographic projection for sectional views. Engineering drawing advanced level may 2012 part 1. May, 20 sectional views 5full section in a full section, the cutting plane linepasses fully through the part.
If the thing we are drawing is quite simple, we can mark the hidden parts by a hidden outline. Fundamentals of computer aided design sectional orthographic. If the thing we are drawing is too complicated for this method, instead of drawing hidden outlines we can make sectional views. A hexagonal pyramid of base 50 mm and axis 100 mm long is resting on its base with two of its side parallel to vp.
The correct method of drawing section lines is shown in part a. Cte online lesson planner introduction to sectional views. Feb 19, 2017 sectioning gives an inside picture of a drawing. Engineering drawing tutorialsorthographic and sectional. Faculty of engineering, tu me 111 engineering graphics tep. Drawing section views middlesex county vocational and. Tech 1styear subject engineering graphics or engineering. Cross sectional views a cross sectional view portrays a cutaway portion of the object and is another way to show hidden components in a device. The observers eye, or station point the plane of projection the projectors also called visual rays or lines of sight. Before you start the copy process, make sure you have drawn the hidden and center lines. Sections and section views on engineering drawings. The solutions to exercises of chapter 17, isometric projection and chapter 20 conversion of views are given in this edition. Slide set 2 drawing views and orthographic projection i.
By the completion of this section, the student will be able to create section views from the basic orthographic projections of front view, right side view andor top view. The views that reveal every detail about the object. Imagine a plane that cuts vertically through the center of the pillow block as shown in figure 16. Type y a4 only orientation of drawing sheet title block sheet size c min d min a4 10 25 a3 10 25 a2 10 25 a1 20 25 a0 20 25. What is the importance of sectioning in an engineering. Engineering graphics, class 9 sectional views mechanical. The name or title of the drawing is the name by which in this case the detail drawing is commonly referred to by many parties involved. Sectional views are an aspect of orthographic drawing. Normally a view is replaced with the fullsection view.
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. An engineering drawing has been the principal means for. Threee different orthographic representations of the hub are shown. For example, some objects need only two views, while others need four. Problems and answers on engineering drawing subject. P the sectional plane is passing through the midpoint of the axis. All these views are known as front view, top view and right side view. Engineering drawing standards manual mechanical engineering branch goddard space flight center greenbelt, maryland august 1994 n a t i o n a l i a e r o n a u t i c s a n d s p a c e a d m i n s t r a t i o. Tech engineering graphics engineering drawing text book by n.
General a view that you orient and is not dependent upon any other view for its orientation. The graphics of engineering design and construction may very. Half sectional view is used for if your component is can be mirror to full view or not enough space in drawing sheet. Pdf a textbook of engineering drawing a textbook of. Pdf engineering drawing for beginners researchgate. D bhatt pdf latest edition to other engineering or diploma students and help them to download engineering drawing book pdf. Sections are used to show interior details clearly. Engineering graphics is a set of rules and guidelines that help you create an engineering drawing. Each engineering field has its own type of engineering drawings. The manual of engineering drawing has long been recognised as the student and practising engineers guide to producing engineering drawings that comply with iso and british standards. All of the various types of sectional views can be drawn with autocad. By the completion of this section, the student will be able to create section views from the basic orthographic projections of front view, right side view andor top view prior knowledge. Then imagine removing the material from the front of this plane, as shown in figure 16.