Lecture Autodesk inventor: Auxiliary views

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Lecture Autodesk inventor: Auxiliary views

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An auxiliary view is an orthographic view that is projected onto any plane other than the frontal, horizontal, or profile plane. An auxiliary view is not one of the six principal views. To show the true size and shape of surface ABCD, an auxiliary view can be created by positioning a line of sight perpendicular to the inclined plane, then constructing the new view.

Auxiliary Views     Motivation Multiview drawing set of an inclined  surface shows:  One view of the surface seen on edge Two views seen as a foreshortened  (i.e., not true size) surface  Sometimes need a view of inclined surface  that shows its true size and shape      From Descriptive Geometry True size and shape of a planar face (or  true length of a line) can only be  represented in an orthographic projection  if: Line of sight is normal to the face, or,  equivalently, View plane is parallel to the face      Definitions An auxiliary view is an orthographic  view that is projected onto any plane  other than one of the principal planes A primary auxiliary view is an auxiliary  view projected from one of the six  principal views  Used to find true size of an inclined surface A secondary auxiliary view is a view  projected from a primary auxiliary view    Used to find true size of an oblique surface   Auxiliary View Projection Theory ­  Object with inclined  surface placed inside  glass box Additional plane  added to glass box ­   parallel to inclined  surface Inclined surface  projected onto  inclined plane      Auxiliary View Projection Theory ­  Inclined projection  plane hinged to  principal projection  plane (Horizontal,  Frontal, Profile) that  shows inclined  surface as an edge     Auxiliary View Projection Theory ­    Views unfolded ­  auxiliary view shows  true size and shape  of inclined surface  Distance from hinge  to edge of inclined  surface same for all  views, principal or  auxiliary  Convention is to  only show inclined  surface in an  auxiliary view   Auxiliary Views: 3 Cases Depending upon  where the inclined  surface appears  on edge, primary  auxiliary views can  be projected from  either the:      Horizontal Plane Frontal Plane Profile Plane       Auxiliary Views Over and Out     ... only show inclined  surface in an  auxiliary view   Auxiliary Views:  3 Cases Depending upon  where the inclined  surface appears  on edge, primary  auxiliary views can  be projected from  either the:... Auxiliary View Projection Theory ­    Views unfolded ­  auxiliary view shows  true size and shape  of inclined surface  Distance from hinge  to edge of inclined  surface same for all  views,  principal or  auxiliary Convention is to ... principal views  Used to find true size of an inclined surface A secondary auxiliary view is a view  projected from a primary auxiliary view    Used to find true size of an oblique surface   Auxiliary View Projection Theory ­ 

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Mục lục

  • Auxiliary Views

  • Motivation

  • From Descriptive Geometry

  • Definitions

  • Auxiliary View Projection Theory - 1

  • Auxiliary View Projection Theory - 2

  • Auxiliary View Projection Theory - 3

  • Auxiliary Views: 3 Cases

  • Slide 9

  • Slide 10

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