Auxiliary Views Auxiliary Views Auxiliary view Orthographic projection

  • Slides: 17
Download presentation
Auxiliary Views

Auxiliary Views

Auxiliary Views • Auxiliary view – Orthographic projection of an angled surface – Appears

Auxiliary Views • Auxiliary view – Orthographic projection of an angled surface – Appears foreshortened in a typical multi-view drawing • Auxiliary views are used to show true size and shape of angled surface features

Foreshortened Surfaces • Foreshortened surfaces on multiview drawings are unclear and inaccurate representation of

Foreshortened Surfaces • Foreshortened surfaces on multiview drawings are unclear and inaccurate representation of size or shape • View should not be dimensioned Foreshortened Face

sta Di ry Au xil ia • Auxiliary view is perpendicular to an angled

sta Di ry Au xil ia • Auxiliary view is perpendicular to an angled surface • Shows true size and shape of the surface features e. g. , hole in surface as shown nc e Foreshortened Surfaces Tru e. H eig ht

Types of Auxiliary Views • Three types of ordinary auxiliary views 1. Depth auxiliary

Types of Auxiliary Views • Three types of ordinary auxiliary views 1. Depth auxiliary 2. Height auxiliary 3. Width auxiliary

Types of Auxiliary Views • Depth auxiliary view derived from front or back view

Types of Auxiliary Views • Depth auxiliary view derived from front or back view to show true depth • Width auxiliary view derived from side view to show true width • Height auxiliary view derived from top or bottom view to show true height

Creating Auxiliary Views • Step #1 – Multi-view drawing containing canted surface – Example

Creating Auxiliary Views • Step #1 – Multi-view drawing containing canted surface – Example will be more clear with auxiliary view of canted surface on front view

1 2 1 5, 6 3 4 5 4, 7 2, 9 9 3,

1 2 1 5, 6 3 4 5 4, 7 2, 9 9 3, 8 8 1, 2 1 2 3, 4 4 3 5 9 8, 7 6 5 8, 9 7 6

Creating Auxiliary Views • Step #2 – Determine true dimension to show on auxiliary

Creating Auxiliary Views • Step #2 – Determine true dimension to show on auxiliary view – Identify reference edges on existing view – Draw appropriately spaced construction lines where auxiliary view will be drawn – Construction lines are reference lines parallel to angled edge

Edge View of Reference Plane R ef er en ce Li ne

Edge View of Reference Plane R ef er en ce Li ne

Creating Auxiliary Views • Step #3 – Draw construction lines outward from each corner

Creating Auxiliary Views • Step #3 – Draw construction lines outward from each corner of view – Auxiliary view will be a 90° rotation of view – Lines must be perpendicular to angled edge – Identify relationship between object corners and construction line intersections

1 1 1 2 5, 6 2 4, 7 2, 9 3 4 3

1 1 1 2 5, 6 2 4, 7 2, 9 3 4 3 7 9 3, 8 1, 2 8 1 4 3 5 9 8, 7 6 5 8, 9 5 9 8 2 3, 4 5 6 7 6 4 7 6

Creating Auxiliary Views • Step #4 – Draw object lines to connect corners that

Creating Auxiliary Views • Step #4 – Draw object lines to connect corners that share a visible edge

1 1 1 2 5, 6 2 4, 7 2, 9 3 4 3

1 1 1 2 5, 6 2 4, 7 2, 9 3 4 3 7 9 3, 8 1, 2 8 1 4 3 5 9 8, 7 6 5 8, 9 5 9 8 2 3, 4 5 6 7 6 4 7 6

 • Auxiliary view is projected from front view • Shows true size and

• Auxiliary view is projected from front view • Shows true size and true shape of the angled surface • If hole were located on surface, then it could be properly dimensioned

Partial Views • Foreshortened object faces can be difficult to draw because of complex

Partial Views • Foreshortened object faces can be difficult to draw because of complex shapes or curves • Short break lines and partial views simplify difficult curves on foreshortened faces while maintaining complete shape description

Partial Views short break lines

Partial Views short break lines