It is not always necessary to use the three standard views. The other views bottom, rear, left side are omitted since they usually do not add any new information. Objectives tatro 2011 create an auxiliary view from orthographic views draw folding lines or referenceplane lines between any two adjacent views construct depth, height, or width auxiliary views produce views to show the true length of a line. Draw construction lines form the outer edges of the part along the angle given for the auxiliary view, if youre not given the angle youll need to.
Drafting principles for the aspiring mechanical engineer. True lengths and auxiliary views engineering drawing. Following that are a series of handson freehand technical sketching exercises based on orthographic third angle projection. If this plane is perpendicular to some principal plane, then the drawing on such drawing is called primary auxiliary views. Generally, auxiliary views are used to show the true shape or true angle of features that appear distorted in the regular views. Today you and i will quickly take a look at the topic waec syllabus for technical drawing 20202021 download waec syllabus pdf 2020. Draw given views and primary and secondary auxiliary views so that the latter shows true shape of oblique surface layout b4 or a34 adjusted. Orthographic projections indian institute of technology.
Rightclick the drawing view and click align drawing view horizontal to sheet clockwise or horizontal to sheet counterclockwise. Before drawing anything, think about where the auxiliary view will be on the page. The standard views used in an orthographic projection are the front, top, and right side views. Primary auxiliary is projected to a plane that is perpendicular to one of the principal planes secondary auxiliary is projected from a primary auxiliary to a plane that is inclined to all three principal views. Nov 05, 2017 hi guys in this video we will learn the role of auxiliary planes in orthographic projection of objects. Auxiliary views are named for the principal dimension shown in the auxiliary view. Auxiliary views what are they and why should we care. In the second and third types of drawings, the auxiliary views are projected from the top and side views. A compressed handbook designed for the students of engineering disciplines for learning the basics of engineering drawing. Drafting, also spelled draughting, also called engineering drawing, graphical representation of structures, machines, and their component parts that communicates the engineering intent of a technical design to the craftsman or worker who makes the product.
Auxiliary views definition an auxiliary view is an ortographic view taken in such a manner that the lines of sight are not parallel to the principal projection planes frontal, horizontal, or profile. We include architectural drawing because our experience has shown that many if not most firstsemester drafting students are interested in careers in the architectural design field, and that a traditional technical drawing text, which focuses solely on mechanical drawing projects, holds little interest for these students. 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. Technical drawing 101 covers topics ranging from the most basic, such as making freehand, multiview sketches of machine parts, to the advancedcreating an autocad dimension style containing the style settings defined by the asme y14. To make the drawings easier to understand, people use familiar symbols, perspectives, units of. Then figure out where to locate the elevation and plan so that you have enough space to draw in the auxiliary view. Explain the theory of orthographic projection and how it relates to technical drafting draw twodimensional orthographic projections from given threedimensional views apply the principles of orthographic projection using cad safety and infection control are adhered to during all aspects of this task. Dftg 5 technical drafting houston community college. Some objects can be completely described in one or two views.
Any auxiliary view projected from the front view, also known as a front adjacent view, is a depth auxiliary view. Technical drawing is essential for communicating ideas in industry and engineering. Creating views of an object using orthographic projection drawing isometric, oblique and perspective views of objects drawing sectional views of an object applying the basic rules of dimensioning for part manufacture drawing auxiliary views and revolutions of inclined surfaces. Auxiliary elevation of right solid with axis parallel to h. If this is the case, then multiple sheets may be used. We include architectural drawing because our experience has shown that many if not most firstsemester drafting students are interested in careers in the architectural design field, and that a traditional technical drawing text, which focuses solely on mechanical drawing. Auxiliary views what is the mainppp yurpose of auxiliary views. Technical drafting multiview drawing produce basic orthographic views produce auxiliary views produce section views produce intersections and developments produce schematic drawings produce pictorial drawings produce detail working drawings produce assembly drawings demonstrate drawing revisions. 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. View comparison pictorial drawing perspective drawing multiview drawing difficult to create easy to visualize. Auxiliary projections of any irregular curve can be made by plotting the positions of a succession of points from the true view and rejoining them with a curve in the auxiliary view. Each principle view is created by looking at the object in the directions indicated in figure 12 and drawing what is seen as well as what is hidden from view. Auxiliary views technical drawing questions and answers.
Mechanical engineering drawing concordia university. There are an infinite number of possible auxiliary views of any given object. The following slides will help show the several methods or types of section views. Basic concept and use, drawing methods and types, symmetrical and unilateral auxiliary views. Horizontal plane hp vertical plane vp side or profile plane pp different views are. Figure showing auxiliary inclined plane should be given with the word problem. An auxiliary dimension is enclosed in parenthesis and no tolerance applies to it. The size and shape of this drawing are actual ones. Size and shape distortion right angle becomes obtuse angle. Auxiliary views are often used to produce views that show the following. Technical drawing section and auxiliary views free download as powerpoint presentation. We will decode the exact reason behind using auxiliary planes. Technical drawing, drafting or drawing, is the act and discipline of composing drawings that visually communicate how something functions or is constructed. There are an infinite number of possible auxiliary views of any given obje.
Technical drawing 101 with autocad 2020 sdc publications. Pdf engineering drawing for beginners researchgate. Nov 10, 2019 today you and i will quickly take a look at the topic waec syllabus for technical drawing 20202021 download waec syllabus pdf 2020. The 6 principle views of an orthographic projection are shown in figure 12. Technical drawing 101 with autocad 2020 on apple books. The cut line is called a cutting plane, and can be done in several ways. The drawing made on this plane is called auxiliary view. Multiple views, auxiliary views, sections, extensive title blocks and notes may require more space than is available on a single sheet.
It does not govern the production or inspection operations and is derived from other values shown on the drawing. For instance, the auxiliary views in figure below are depth auxiliary views since they show the objects depth. Nov 26, 20 creating auxiliary views in autocad duration. Technical drawing with engineering graphics, 15th edition. Auxiliary views definition an auxiliary view is an orthographic view taken in such a manner that the lines of sight are not parallel to the principal projection planes frontal, horizontal, or profile. If a view is now taken in the direction of arrow y, the tilted box will be turned through 90 in the direction of the arrow, and dimension 1 to the corner will lie parallel with the plane of the paper. Aug 12, 20 auxiliary views definition an auxiliary view is an orthographic view taken in such a manner that the lines of sight are not parallel to the principal projection planes frontal, horizontal, or profile. Drawing section views middlesex county vocational and. This course is meant to give a brief introduction to mechanical drawings that an engineer would typically give to a machine or fab shop or create for the mass production environment.
Orthographic projections orthographic projections is a technical drawing in which different views of an object are projected on different reference planes observing perpendicular to respective reference plane. Auxiliary views technical graphics technical graphics. In technical drawing and computer graphics, a multiview projection is a technique of illustration by which a standardized series of orthographic twodimensional pictures are constructed to represent the form of a threedimensional object. You can set auxiliary views and section views to be orthographically aligned to the drawing sheet. Technical drafting nocti job ready assessment page 3 of 12 technical drafting general assessment information continued the international sign association isa represents manufacturers, suppliers and users of onpremise signs and sign products from all 50. Explain the theory of orthographic projection and how it relates to technical drafting draw twodimensional orthographic projections from given threedimensional views apply the principles of orthographic projection using cad safety and infection control. An example of one of the methods developed to accomplish this task is shown in figure 8. In the first type, the auxiliary view is projected from the front view of a three view orthographic 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. Auxiliary views auxiliary view of an ellipse drawing section views section views section views introduction 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.
Must be evenly distributed, structured and not duplicated. Circular hole becomes ellipse distorted width accurately presents objects details, i. Shape and angle distortion object looks more like what our eyes perceive. A tsquare is a technical drawing instrument primarily used for drawing horizontal lines on a. In the example above please note that this is, sheet 1 of 1 i. Drawing must state the scale used to fit the component onto the drawing sheet. Anderson 17 drawing views detail views when there is a great disparity between feature size, or views are overcrowded with dimensions, a detail view can be used to capture the features of interest and display them in a removed view of greater scale. In this article, youll learn about the auxiliary view its types, methods, and how to draw it. At the design stage, both freehand and mechanical drawings serve the functions of. The auxiliary plan view is a true view on the tilted box.