1.2.3a_MultiviewSketching.docx

Activity 1.2.3a Multiview Sketching Introduction It’s a very common occurrence to see a product advertisement and think, “I thought of an idea for something like that just a few months ago.” People spend a lot of time in their various interest areas and envision ideas for making things work better. Spend some time with someone who has a permanent disability and see how many product ideas come to mind that would provide a degree of freedom to a person who has lost a physical capability. Coming up with wonderful ideas are only the first step in developing solutions to problems. At some point, ideas must be built. You’ve practiced different techniques for sketching objects so that they appear to have a three-dimensional quality. These techniques are excellent for quickly communicating ideas to both technical and nontechnical people. Those who make their living building ideas require a different type of drawing format. A multiview sketch, also referred to as an orthographic projection sketch, is the standard sketch format used by engineers to communicate ideas to professionals in the building trades. However, pictorials do not provide accurate information about the true size and shape of an object and all of its features. It is often the case that engineered objects have features and edges that are obscured by the standard surface views of a multiview drawing. These views require hidden lines. When engineers create drawings of cylindrical objects, or objects that have holes, they must represent their axes and axes points with centerlines. Knowing how to sketch and interpret multiviews is an important skill for any engineer. In this activity, you will develop your ability to see and sketch objects as a series of related two-dimensional views. Understanding and using the different line conventions, discussed earlier in this lesson, will help when creating these views. Equipment ● Pencil ● Engineering notebook Procedure 1. Study the images that follow. The various surfaces of the object are identified by letters on the isometric drawing and by numbers on the multiview drawing. In the table, write the number that corresponds with the lettered surface in each of the top, front, and right-side views. © 2012 Project Lead The Way, Inc. Introduction to Engineering Design Activity 1.2.3 Multiview Sketching – Page 1

Top Front Side A 9 3 21 B C D E F G H 2. For each of the objects that follow, select the face that would provide the best front view. Then create a quick sketch of the orthographic projection showing your selected view in approximate proportions. Finally, determine the minimum number of views required to adequately represent the object and indicate the views (in addition to the front view that you would use to represent the object. Object Front View Sketch Minimum number of views: Additional orthographic views to include: Object Front View Sketch © 2012 Project Lead The Way, Inc. Introduction to Engineering Design Activity 1.2.3 Multiview Sketching – Page 2

Minimum number of views: Additional orthographic views to include: Minimum number of views: Additional orthographic views to include: Minimum number of views: Additional orthographic views to include: Object Front View Sketch © 2012 Project Lead The Way, Inc. Introduction to Engineering Design Activity 1.2.3 Multiview Sketching – Page 3

Minimum number of views: Additional orthographic views to include: Minimum number of views: Additional orthographic views to include: © 2012 Project Lead The Way, Inc. Introduction to Engineering Design Activity 1.2.3 Multiview Sketching – Page 4

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