Why We Need Auxiliary Views?

What are Auxiliary views? According to a popular definition, an Auxiliary view is defined as, “It is an orthographic view which is taken in a manner that the lines...

What are Auxiliary views?

According to a popular definition, an Auxiliary view is defined as, “It is an orthographic view which is taken in a manner that the lines of sight are not parallel to the principal planes of projection like frontal, horizontal and profile. These views can be infinite for a given object. It is not among the six principal views. It is used when all the six principal views are not able to completely describe the object’s real shape and size. Usually it is needed when there are inclined planes or features of an object which are difficult to describe.

Auxiliary views are preferably used in engineering drawings. Whenever we need to provide real dimensions to given objects, we always choose and create auxiliary views to make the object appear true to size. Theoretically, there are three regular planes of projection but actually, there are six planes of projection. An auxiliary plane is not among these six planes.

The foremost and basic rule of dimensioning is that when true shape and size of a line and plane can be projected, it can be dimensioned. In order to satisfy this rule, an imaginary plane is created which is parallel to the line or surface of the object. This plane is called the Auxiliary plane.

Auxiliary views help to create the three-dimensional view of the lines and planes to be dimensioned. To explore more, ask for auxiliary views assignment help.

Many objects are so complex that single auxiliary view is not sufficient to explain the shape or dimensions of the object. The geometry or certain features may still remain hidden even after using a single auxiliary view. This is considered as the primary auxiliary view. Then a secondary auxiliary view is needed. The primary auxiliary view is projected off on one of the six principal views whereas secondary auxiliary view is projected off on primary auxiliary view. These views are explained as follows:

  • Primary auxiliary view: It is a single view projected from one of the six principal views.
  • Secondary auxiliary view: It is a single view projected from a primary auxiliary view.
  • Tertiary auxiliary view: It is a single view projected from a secondary or another tertiary auxiliary view.

In actual industry, complete auxiliary views are not commonly drawn. The partial auxiliary views are taken into consideration which shows mostly the T.S. of the object. As most of the surfaces are foreshortened, the complete primary auxiliary view becomes difficult to read. It becomes more difficult if the views accumulate or exceed the required number of views. Only those views which help in production and give a clear representation of the true geometry of the given object are used in reality.

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