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CAD technology is the universal choice in industry. However, it is useful to include a discussion of the instruments that were historically used for this purpose. Manual drafting is an appropriate way teach the fundamentals of engineering graphics. The most important concepts of engineering graphics are...
Engineering is a unique discipline whose practitioners collaboratively manipulate material, energy, and information to create solutions to humanity’s challenges. As a creative discipline, engineering involves generating new designs, evaluating alternatives, and making decisions under constraints. As a collaborative discipline, it necessarily ...
- Introduction
- Isometric Drawing
- Orthographic Or Multiview Drawing
- Dimensioning
- Sectioning
- Drawing Tools
- "Assembly" Drawings
- Cross-Sectional Views
- Half-Sections
- Sectioning Objects with Holes, Ribs, etc.
One of the best ways to communicate one’s ideas is through some form of picture or drawing. This is especially true for the engineer. The purpose of this guide is to give you the basics of engineering sketching and drawing. We will treat “sketching” and “drawing” as one. “Sketching” generally means freehand drawing. “Drawing” usually means using dr...
The representation of the object in figure 2 is called an isometric drawing. This is one of a family of three-dimensional views called pictorial drawings. In an isometric drawing, the object’s vertical lines are drawn vertically, and the horizontal lines in the width and depth planes are shown at 30 degrees to the horizontal. When drawn under these...
Imagine that you have an object suspended by transparent threads inside a glass box, as in figure 3. Figure 3 - The block suspended in a glass box. Then draw the object on each of three faces as seen from that direction. Unfold the box (figure 4) and you have the three views. We call this an “orthographic” or “multiview” drawing. Figure 4 - The cre...
Figure 7 - An isometric view with dimensions. We have “dimensioned” the object in the isometric drawing in figure 7. As a general guideline to dimensioning, try to think that you would make an object and dimension it in the most useful way. Put in exactly as many dimensions as are necessary for the craftsperson to make it -no more, no less. Do not ...
There are many times when the interior details of an object cannot be seen from the outside (figure 8). Figure 8 - An isometric drawing that does not show all details. We can get around this by pretending to cut the object on a plane and showing the “sectional view”. The sectional view is applicable to objects like engine blocks, where the interior...
To prepare a drawing, one can use manual drafting instruments (figure 12) or computer-aided drafting or design, or CAD. The basic drawing standards and conventions are the same regardless of what design tool you use to make the drawings. In learning drafting, we will approach it from the perspective of manual drafting. If the drawing is made withou...
An isometric view of an “assembled” pillow-block bearing system is shown in figure 13. It corresponds closely to what you actually see when viewing the object from a particular angle. We cannot tell what the inside of the part looks like from this view. We can also show isometric views of the pillow-block being taken apart or “disassembled” (figure...
A cross-sectional view portrays a cut-away portion of the object and is another way to show hidden components in a device. Imagine a plane that cuts vertically through the center of the pillow block as shown in figure 15. Then imagine removing the material from the front of this plane, as shown in figure 16. Figure 15 - Pillow Block. Figure 16 - Pi...
A half-section is a view of an object showing one-half of the view in section, as in figure 19 and 20. Figure 19 - Full and sectioned isometric views. Figure 20 - Front view and half section. The diagonal lines on the section drawing are used to indicate the area that has been theoretically cut. These lines are called section lining or cross-hatchi...
The cross-section on the right of figure 22 is technically correct. However, the convention in a drawing is to show the view on the left as the preferred method for sectioning this type of object. Figure 22 - Cross section.
Engineering graphics is a set of rules and guidelines that help you create an engineering drawing. An engineering drawing is a drawing or a set of drawings that communicates an idea, design, schematic, or model. Engineering drawings come in many forms. Each engineering field has its own type of engineering drawings.
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Sep 14, 2007 · What is engineering graphics? Engineering drawing. Engineering graphics is the creation of engineering drawings. These are representations of physical objects/locations on paper (or in 2 dimensional or 3 Dimensional electronic format). In a typical introductory engineering graphics course it covers the basics of drawing view creation (left side ...
Dec 30, 2021 · Introduction to engineering drawings. Engineering drawing, most commonly referred to as engineering graphics, is the art of manipulation of designs of a variety of components, especially those related to engineering. It primarily consists of sketching the actual component, for example, a machine, with its exact dimensions, and using entities ...
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Sep 4, 2024 · Here’s a look at some of the most common types of engineering drawings: 1. Assembly Drawings. These drawings show how multiple parts fit together to form a complete unit. They depict the components of a machine or a system in their relative positions and are essential in guiding the assembly process.
