To produce a sectional view, a cutting plane is imagined cutting through the part, as shown in fig. The cut line is called a cutting plane, and can be done in several ways. The cutting plane cuts the object at an angle, but the drawing is rotated for a better view by the observer. The cutting plane is lettered and the arrows indicate the direction of viewing. When one view is drawn sectional, other views are drawn as if the object is not cut and the.
Sectional views are used in technical drawing to expose internal surfaces. Section view styles control the appearance of each of the listed entities. Schematic conventional detailed graphic section views examples. Then create a computergenerated fully dimensioned multi view part drawing showing the front view and full section view as indicated. The exception to this rule is when the object has a predefined or generally accepted front view. From a primary auxiliary view 1 a secondary auxiliary view 2 can be drawn. Good sectional view drawing practices different parts at different angles or patterns hatch spacing of about 11618 cutting plane line.
Sample drawings for residential additions clarington. A sectional view obtained by assuming that the object is completely cut by a plane is called a full section or sectional view. Deletion of microfilming requirements for drawing format. Types of sections are described in the following paragraphs. Engineering graphics, class 9 sectional views mechanical. Note that the section view will appear larger than the views below which are not shown to scale.
Create a solid model of drill block in number 3 above. Normally a view is replaced with the fullsection view. Consequently, no individual view contains sufficient information to completely define the shape of the. Sections and sectional views are used to show hidden detail more clearly.
Sometimes hatching may be omitted, if the clarity of drawing is not. Pictorial orthogonal section bb mec076 engineering drawing interpretation 1 resource package december, 1998 sectional views section aa. Drawings for specialized engineering disciplines e. Methods of drawing orthographic projections different reference planes are fv is a view projected on vp. The sectioned view provides all the inner details, better than the unsectioned view. Sectional views reveal hidden details in a mechanical drawing. 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.
A primary auxiliary view is projected onto a plane that is perpendicular to one of the principal planes of projection and is inclined to the other two. Sacramento city college engineering design technology. N infinite number of such successive auxiliary views may be drawn. An engineering drawing is a drawing or a set of drawings that communicates an idea, design, schematic, or model. Additional notes on various topics added to note examples section. Sectional views basic blueprint reading pressbooks. We will transform the copied front view into the sectional view. Even in half sectional views, it is a good practice to omit the hidden lines. When one view is drawn sectional, other views are drawn as if the object is not cut and the object exists as a wholeobject exists as a whole. Detail drawings seldom describe the intent of an engineering design.
When one is creating a section in a drawing, he is typically following proper drawing practices to show orthographic views that are then cut with a section line in order to generate a section. Drawing section views middlesex county vocational and. Click layout tabcreate view panelsection dropdownfull. An engineering design is usually defined by many individual detail drawings which combine to form an assembly drawing. The correct method of drawing section lines is shown in part a.
Any view obtained by a projection on a plane other than the horizontal, frontal, and profile projection planes is an auxiliary view. A full section is a sectional view that shows an object as if it were cut completely apart from one end or side to the other. They serve to present additional orthographic views of surfaces that appear as hidden. The corners of the section view are numbered so that they can be compared with the orthographic. All information that is part of the paper chart is included in the file. A revolving view is effective for elongated objects or the elongated section of an object. Chapter 4 orthographic projection and multiview constructions. Sections in creooffset, zone sections, fullunfold, full.
Pdf created with fineprint pdffactory pro trial version. A cuttingplane line shows where object was cut to obtain the section view. The cross section looks like figure 12 when it is viewed from straight ahead. A drawing that displays technical information to the reader. The angle of revolution should always be less than 90 degree. The part or parts cut away are shown by the use of section crosshatching lines. Fundamentals of drafting orthographic projection with. Following this rationale, there is no reason to allow the user to take a section view from the model and place it in the drawing. Cross hatching in the section view shows the solid surface of the object which were cut through to produce the section. In this book, you will learn how to use all of the formal elements of drawing line, shape, value, color, pattern, and textureto create wellcomposed still lifes, landscapes, human figures, and faces. Multiview drawings usually require several orthographic projections to define the shape of a threedimensional object.
Fundamentals of drafting orthographic projection with sectional views objectives. Sections are used to show interior details clearly. Cutting planes are indicated on the drawing by a long chain line 0. And different views are front view fv, top view tv and side view sv important terms of orthographic projections. A detailed view is a portion of a model shown in another view. Sectional view types full sections half sections offset sections broken sections revolved sections conventional breaks partial views. A full section is a sectional view that shows an object as if it were cut. About section views autocad 2016 autodesk knowledge. Removed, revolved and offset representation formats for threaded holes in section. In figure below, auxiliary view 1 is a primary auxiliary view projected from the top view.
An aeronautical raster chart is a digital image of an faa vfr chart. Sectional drawing figure 2 shows two primary views of a component. For example, a sphere only requires one view, and a block only requires two views. The name and or drawing number of the assembly drawing in which the detail drawing is called up or used on is stated in the title block. Click in the drawing area to indicate the start point of the section line. The diagonal lines on the section drawing are used to indicate the area that has been theoretically cut.
A section view is created by passing an imaginary cutting plane vertically through the center of the part. The federal aviation administration faa digitalvisual chart series is designed to meet the needs of users who require georeferenced raster images of faa visual flight rules vfr charts. The section lined areas are those portionsthat have been in actual contact with thecuttingplane. Find click the view you want to use as the parent view. This figure is a 3d representation of the part after it is sectioned. To create a full section view autocad 2018 autodesk. It usually contains the least number of hidden lines. The guided sketchbook that teaches you how to draw. Drawing basics section view looking in direction of arrows. The chapter describes how to create one, two, and three view drawings with traditional tools and cad. The sectional view or plan must then be stated to be aa, or other letters appropriate to the cutting plane. For example, electrical engineers draw circuit schematics and circuit board layouts.
In this view, the cross sectional shape of ribs, spokes, and other projections of the object are featured. This section view more clearly shows the interior features of the part. For a half section, the cutting plane removes only one quarter of an object. They are created by using a cutting plane to cut the object. Before you start the copy process, make sure you have drawn the hidden and center lines.
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. Copy view to be cross sectioned start the process by copying the front view third angle projection of the object. In sectional views, the shape of the section, visible edges and contours of object behindvisible edges and contours of object behind the section plane are drawn. For a symmetrical object, a half sectional view is used to indicate both interior and exterior details in the same view. Picture the two halves of the object pulled apart, exposing the interior construction, as shown in fig. Approved and preferred by dod policy for drawing guidance. A section is a view of no thickness and shows the outline of the object at the cutting plane. The extent of the section should correspond ylith the sectional arroyl shoyln on the plans. Full section views exercise selectivity andalusia 2014. Sectioning is used frequently on a wide variety of industrial drawings. Refer to figure 916 these views are sometimes just called sections. Each orthographic view is a twodimensional drawing showing only two of the three dimensions of the threedimensional object. Drawing sectional views on a normal view, show where the cutting plane passes through the object by drawing a special line called a.
Computer graphics purpose and function of aircraft drawings. Sometimes in creo drawings, it is necessary to include 3d sectional view or offset sectional cut to include inside components in the cross section. When the cutting plane cuts across the web, the web is hatched in the section view section aa. Drawing tools to prepare a drawing, one can use manual drafting instruments figure or computeraided drafting or design, or cad. Half sections convenient way to show the view and section in symmetric parts. To extend the principle of orthographic projection for sectional views. A half section is a view of an object showing onehalf of the view in section, as in figure 19 and 20. These views assume that a cutting plane has removed portions of the object represented by the drawing, displaying the appropriate section of the interior. Use the section view sketch mode in conjunction with the section tool user interface to create both section views and aligned section views. In this case, we will look toward the left half of the object in the section view. A half sectional view is preferred for symmetrical objects. Hidden detail like holes are not shown on the section view.
Technical drawing tutorial doug smith memorial university of newfoundland october 18, 2012. The following slides will help show the several methods or types of section. Sectional views 5full section in a full section, the cutting plane linepasses fully through the part. To be aware of the basic conventions for sections and representing areas on sections outlined in bs iso 12840 and bs iso 12850. Take away the front half figure 11 and what you have is a full section view figure 12. An engineering drawing often needs to show features that we cant see because. The illustrations below show the different entities generated by the viewsection command, and the terms used to refer to them. Sectional view drawings a section or sectional view is obtained by cutting away part of an object to show the shape and construction at the cutting plane. It is about making the total cut at a given elevation and plan your piece. Building drawing 1 main parts of a one storied building roof. Full, half, removed, revolved rotated, aligned, offset, brokenout, partial, assembly and pictorial.