Auxiliary View
An auxiliary view is a 2D representation of a 3D object that provides additional information about the object's shape and features. It is typically used in technical drawings and engineering to show details that are not easily visible in standard orthographic views. By providing a different perspective, auxiliary views help to fully communicate the design and dimensions of an object.
5 Key excerpts on "Auxiliary View"
eBook - ePub- Roger Timings(Author)
- 2007(Publication Date)
- Routledge(Publisher)
...In first angle projection, the end view looking at the nose of the aircraft would be drawn somewhere beyond the tail. An end view looking at the tail of the aircraft would be drawn somewhere beyond the nose. It is much more convenient to draw the end view of the nose of the aircraft at the nose end of the elevation. Also, it is more convenient to draw an end view of the tail of an aircraft next to the tail of the elevation. Figure 5.6 Auxiliary View: EL = elevation; EV = end view; PL = plan; AV = Auxiliary View To avoid confusion, always state the projection used on the drawing. Sometimes the projection used is stated in words, more usually it is indicated by the use of a standard symbol. Figure 5.5 (b) shows the combined projection symbol and how it is used. So far we have only considered features that are conveniently arranged at right angles to each other so that their true shape is shown in the plan, elevation or the end view. This is not always the case and sometimes we have to include an Auxiliary View. This technique is important in the production of working drawings so that the positions of features on the surface that is inclined not only appear undistorted but can also be dimensioned. Figure 5.6 shows a bracket with an inclined face. When it is drawn in first angle projection, it can be seen that the end view showing the inclined surface and its features is heavily distorted. However, these features appear correct in size and in shape in the Auxiliary View (AV) which is projected at right angles (perpendicular) to the inclined face. 5.4 Conventions An engineering drawing is only a means of recording the intentions of the designer and communicating those intentions to the manufacturer. It is not a work of art and, apart from the time spent in its preparation, it has no intrinsic value. If a better and cheaper method of communication could be discovered, then the engineering drawing would no longer be used...
eBook - ePub- Ken Morling, Stéphane Danjou(Authors)
- 2022(Publication Date)
- Routledge(Publisher)
...length to width, then this would usually require either using a small scale or increasing the drawing sheet size. A typical example is a long pipe or beam. Showing the part in full length could lead to a large portion of empty drawing space. To avoid this, the part can be shown shortened. That means that the part is drawn at the desired scale but a middle portion is left out. Figure 6.6 An engine block shown as a full view and a partial view. Figure 6.7 Broken view of a punched frame. Figure 6.7 depicts an example of a punched frame. Owing to its length, the part would probably not fit on A4 or A3 paper and still show all the details at a satisfying scale. On the right-hand side the punched frame is shown as a broken view, i.e. the middle portion is left out and the view is interrupted by narrow freehand lines. Note: the overall length is dimensioned as it would not have been broken, which means the dimension shall show the true length. 6.2.4 Auxiliary Views Some objects show features whose faces are not parallel to any of the glass box side walls and therefore cannot be shown in true size in any of the six principal views. The solution is to introduce an Auxiliary View in such a way that the auxiliary plane is parallel to the feature’s major face. The development of auxiliary elevations is explained in depth in Chapter 4. Therefore, at this point it suffices to point out that Auxiliary Views can be helpful to clearly describe an object. Figure 6.8 depicts an example shown in first angle projection. Figure 6.8 Angle bracket shown in front view, left-side view, top view and Auxiliary View. It is worth mentioning that complex objects require successive Auxiliary Views, which means, for example, that a secondary Auxiliary View is projected from a primary view. Since Auxiliary Views are sometimes difficult to interpret due to their non-standard orientation, hidden lines should be omitted to increase legibility...
eBook - ePubDrafting Fundamentals for the Entertainment Classroom
A Process-Based Introduction Integrating Hand Drafting, Vectorworks, and SketchUp
- Eric Appleton(Author)
- 2021(Publication Date)
- Routledge(Publisher)
...An edge appears in true length on the picture plane to which it is parallel; it will appear foreshortened in other views. Oblique : the plane and its edges are not parallel to any picture plane, and therefore appear foreshortened in all views. No edges appear in true length in any standard view. An oblique surface is also called “skewed.” 3 An Auxiliary View does not replace any of the standard orthographic views, nor does it typically show the whole of the object since that would present a distorted representation of the area around the incline. For oblique planes, it is usually necessary to derive the auxiliary from a section of one of the standard views. Layout planning should ensure that placement of the Auxiliary View does not crowd other views. The Auxiliary View should be near to the view it references for context, which means it may be necessary to push nearby standard views a little farther out (Figure 3-15). FIGURE 3-15 Placement of Auxiliary Views; guidelines show with which surface the Auxiliary View is associated The Two-Triangle Technique When you need to draw a rectangle whose lines do not fall into the range of standard triangle degrees (15°, 30°, 45°, etc.), the two-triangle technique is useful. One triangle is used as a reference edge. A T-Square may be used, but they're a bit cumbersome for this purpose, and the transparency of triangles allows the draftsperson to better see what they're doing. Since both 45° and 30°/60° triangles have a 90° corner, either triangle can serve as the reference edge. First, draw one of the sides of the angled rectangle. Align one of the 90° edges of one triangle with the angled line...
eBook - ePub- Roger Timings(Author)
- 2008(Publication Date)
- Routledge(Publisher)
...In first angle projection, the end view looking at the nose of the aircraft would be drawn somewhere beyond the tail. An end view looking at the tail of the aircraft would be drawn somewhere beyond the nose. It is much more convenient to draw the end view of the nose of the aircraft at the nose end of the elevation. Also, it is more convenient to draw an end view of the tail of an aircraft next to the tail of the elevation. Sometimes the projection used is stated in words, more usually it is indicated by the use of a standard symbol. Figure 4.13(b) shows the combined projection symbol and how it is used. To avoid confusion, always state the projection used on the drawing Figure 4.14 Auxiliary View: EL = elevation; EV = end view; PL = plan; AV = Auxiliary View So far we have only considered features that are conveniently arranged at right-angles to each other so that their true shape is shown in the plan, elevation or the end view. This is not always the case and sometimes we have to include an Auxiliary View. This technique is important in the production of working drawings so that the positions of features on the surface that is inclined not only appear undistorted but can also be dimensioned. Figure 4.14 shows a bracket with an inclined face. When it is drawn in first-angle projection, it can be seen that the end view showing the inclined surface and its features are heavily distorted. However, they appear correct in size and in shape in the Auxiliary View (AV) which is projected at right-angles (perpendicular) to the inclined face. 4.11 Conventions An engineering drawing is only a means of recording the intentions of the designer and communicating those intentions to the manufacturer. It is not a work of art and, apart from the time spent in its preparation, it has no intrinsic value. If a better and cheaper method of communication could be discovered, then the engineering drawing would no longer be used...
eBook - ePubManual of Engineering Drawing
British and International Standards
- Colin H. Simmons, Dennis E. Maguire, Neil Phelps(Authors)
- 2020(Publication Date)
- Butterworth-Heinemann(Publisher)
...In all orthographic drawings, it is necessary to project at least two views of a three-dimensional object – or one view and an adequate description in some simple cases, a typical example being the drawing of a ball for a bearing. A drawing of a circle on its own could be interpreted as the end elevation of a cylinder or a sphere. A drawing of a rectangle could be understood as part of a bar of rectangular cross-section, or it might be the front elevation of a cylinder. It is therefore generally necessary to produce at least two views, and these must be read together for a complete understanding. Fig. 6.15 shows various examples where the plan views are identical and the elevations are all different. Fig. 6.13 Stage 3. Fig. 6.14 Stage 4. A single line may represent an edge or the change in direction of a surface, and which will be determined only by reading both views simultaneously. Fig. 6.16 shows other cases where the elevations are similar but the plan views are considerably different. Fig. 6.15 Identical plan views with different elevations. Fig. 6.16 Similar elevations with different plan views. A certain amount of imagination is therefore required when interpreting engineering drawings. Obviously, with an object of greater complexity, the reading of three views, or more, may well be necessary. Projection exercises It is clear to us that after teaching draughting and CAD for many years, visualizing a proposed new product in three dimensions, which is how you naturally view a finished article, is difficult when it is necessary to read more than one complex two-dimensional drawing simultaneously. The designer also ultimately needs to produce technically correct drawings, often from vague initial ideas. The very action of making proposal drawings stimulates many questions and their answers allow development to continue. Modifications to original ideas involve drawing amendments, and changes to one view invariably have a ‘knock on effect’...
