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Multiview Drawings

Multiview Drawings. Objectives. Identify an orthographic projection. Select the best views to describe an object. Identify objects from an orthographic projection drawing. Identify the visualization rules of an orthographic projection drawing. What is an Orthographic Projection?.

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Multiview Drawings

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  1. Multiview Drawings

  2. Objectives • Identify an orthographic projection. • Select the best views to describe an object. • Identify objects from an orthographic projection drawing. • Identify the visualization rules of an orthographic projection drawing.

  3. What is an Orthographic Projection? • An orthographic projection is a multi-view drawing used to show all of the features of an object. • Different views are set up in a systematic way to mentally connect them together.

  4. Purpose of Orthographics • Shows the true size and shape of the features of an object • Provide certain information on how the object is to be made.

  5. The Projection of Views • Must be able to visualize the object as a whole and be able to mentally put the views together. • Views are projected at right angles (90 Deg) to each other. • There are 6 different views possible in an orthographic projection.

  6. Possible Views Top Bottom Front Right Side Back Left Side

  7. Selection of Views • Not all 6 views have to be shown in an orthographic projection drawing. • Details are repeated in the top and bottom, right and left, and the front and back views.

  8. Rules For Selecting Views • 1. Only views that clearly describe the object are used. • 2. Views that show the least hidden lines should be selected. • 3. The object should be shown in it’s functioning position when possible. • 4. The view that best describes the object should be selected as the front view.

  9. Visualization • Visualization is the ability to form a mental picture of what an object is going to look like when it’s completed.

  10. Visualization Rules • 1. Scan briefly all views shown. • 2. Study the front view for shape description. • 3. Move from view to view to find similar lines, surfaces, and shapes. • 4. Study one feature at a time and begin to put the shapes together to form the 3 dimensional shape of the object.

  11. Summary • The purpose of an orthographic projection is to show an object in it’s true shape and size. • The different views in an orthographic projection are projected at 90 degrees to each other.

  12. Summary • Four rules should be considered when selecting which views to use. • Visualization involves being able to form a mental picture of what the object is to look like. • Use the 4 visualization rules to help form a mental picture of the object.

  13. Summary Questions • 1. What is an orthographic projection? • 2. What are the proper locations of all six views that can be produced in an orthographic projection? • 3. Out of the six possible views, why do we usually only select 3? • 4. What 4 rules must you follow when selecting the views for an orthographic projection?

  14. Objectives • Identify an orthographic projection. • Select the best views to describe an object. • Identify objects from an orthographic projection drawing. • Identify the visualization rules of an orthographic projection drawing.

  15. Assignment • Identify the proper orthographic layout for the 3 dimensional objects on page 45 in your book. • Complete to an accuracy of 100%.

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