12auxiliary views

7/27/2019 12Auxiliary Views

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AUXILIARY VIEWS


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Study of auxiliary projection planes

Study of AutoCAD technique to obtain true

shape and desired features of an inclined

surface in an object using auxiliary view.

Study of AutoCAD technique to obtain trueshape and desired features of an oblique

surface in an object using auxiliary views.

LEARNING OBJECTIVES


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INTRODUCTION

Auxiliary means additional.

An additional view, besides three

principal views to give better description

of an object or some of its features.

To understand how to generate views

that shows inclined and oblique

surfaces in true shape in multi-view


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NEED OF AUXILIARY VIEW


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NEED OF AUXILIARY VIEW


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TYPES OF AUXILIARY PROJECTION

PLANES

Projection plane perpendicular to HP and

inclined to VP and PP. This is also called as

Auxiliary Vertical Plane (AVP

)


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PLANES

Projection plane perpendicular to VP and

inclined to HP and PP. This is also called as

Auxiliary Inclined Plane (AIP)


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PLANES

Projection plane perpendicular to PP and

inclined to HP and VP. This is also called as

Auxiliary Inclined Plane (AIP)


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Projection plane which is inclined to HP, VP

and PP is called as Auxiliary Oblique Plane

(AOP)


PLANES


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TYPES OF AUXILIARY VIEWS

SINGLE AUXILIARY VIEW

1) ADJACENT TO F. V.

2) ADJACENT TO T. V.

3) ADJACENT TO S. V.

DOUBLE AUXILIARY VIEW

AUXILIARY VIEWS


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TYPES OF AUXILIARY VIEWS

Primary (Single) auxiliary view

technique is used to find out the true

shape of an Inclined Surface.

Secondary (Double) auxiliary view

technique is used to find out the true

shape of a Skew Surface.


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(True shape adjacent to FV)

Auxiliary plane is perpendicular to HP and inclined to VP &PP.

Auxiliary and front views have the height dimension in


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(True shape adjacent to TV)

Auxiliary plane is perpendicular to VP and inclined to HP& PP.

Auxiliary and top views have the depth dimension incommon.


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(True shape adjacent to SV)

Auxiliary plane is perpendicular to PP and inclined to HPVP.

Auxiliary and front views have the width dimension in


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From the three illustrations, it will reveal the

fact that a single auxiliary view is always

adjacent to the principal view.


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SINGLE AUXILIARY STEPS

Identify the edge view of the inclined surface

and mark points in both the views.

Copy the edge view, rotate it and make it

parallel to x-y line.

From this rotated edge view, complete the other

view by aligning the edge view points with the

surface view points.

Final view should be the true shape of an

inclined surface.


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A skew surface does not appear in its edge

view on any of the principal planes.

It is necessary to obtain the edge view of the

skew surface by an auxiliary projection before

its true view can be drawn by second

auxiliary projection.



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DOUBLE AUXILIARY STEPS

Locate one edge of the surface which represents true

length.

Rotate the surface view so that the true length

becomes perpendicular to x-y line.

Complete the other view by aligning the points. The

result is an edge view.

Rotate the edge view and make it parallel to x-y line.

From this rotated edge view, complete the other view

by aligning the edge view points with the surface view

points.

Final view should be the true shape of an inclined


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EXAMPLE 1


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EXAMPLE 2


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EXAMPLE 3

12auxiliary views

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