Multiview Drawings - PowerPoint PPT Presentation

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  1. Multiview Drawings

  2. Visualization is the ability to see clearly in the mind's eye what a machine, device, or other object looks like. • Implementation is the process of drawing the object that has been visualized.

  3. A properly made technical drawing, such as the one at right, gives a clearer, more accurate description of an object than a photograph or written explanation. Technical drawings made according to standard principles result in views that give an exact visual description of an object. Pictorial Drawing

  4. Normal Views • The front, top, and right-side views are the ones most often used to describe an object in a technical drawing. They are therefore known as the normal views. The normal views of the V-block shown above are shown in the example at right.

  5. Other Views • Most objects have six sides, or six views: top, front, bottom, rear, right-side, and left-side, as shown below. In most cases, two or three views can be used to describe completely the shape and size of all parts of an object. However, in some cases it may be necessary to show views other than the front, top, and right side. Only in very unusual cases are six views necessary.

  6. Orthographic Projection

  7. Number of Views • The main purpose of drawing views is to describe the shape of something. Therefore, it is a waste of time to make more views than are necessary to describe an object. In fact, some objects require only one view.

  8. Selecting the Front View • Look for the best shape or most contours. • Show the most natural position of use. • Display the most stable position. • Provide the longest dimension. • Contain the least hidden features.

  9. Showing Hidden Features • Hidden features are parts of the object not visible in the view you are looking at. A visible edge appears as a solid line. A hidden edge is shown with a hidden line. Hidden lines are thin to provide contrast to object lines.