Problem 6.2 Projection of Solids

Problem 6.2 Projection of Solids – A hexagonal prism of 30 mm side of base and 70 mm height, resting on the H.P. such that the axis is inclined at 300 to the H.P. and 600 to the V.P. Draw its projections. Keep the top end of the prism near to the V.P.

Projection of Solids Problems - Engineering Drawing
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Procedure:

Step-1 Draw a horizontal x-y line of some suitable length.

Step-2 Draw a hexagon of side of length 30 mm, below the x-y line at some suitable distance such that two sides of the hexagon should be perpendicular with the x-y line, as shown into the figure. And give the notations. It is the top view of the 1st stage.

Step-3 From the notations of the hexagon in top view, draw perpendicular vertical projectors of the length equal to 70 mm from x-y line, and give the notations as shown into the figure. It is the front view of the 1st stage.

Step-4 Now copy the front view of the 1st stage as the front view of the 2nd stage with the same dimensions, such that the center line of the hexagonal prism should be inclined at an angle 30° with the x-y line, and the corner of the prism that is  a’b’ should touch with the x-y line, as shown into the figure. And give the notations. It is the front view of the 2nd stage.

Step-5 From the notations of the front view of the 2nd stage draw vertical projectors into down ward direction and from the top view of the 1st stage draw projectors into horizontal direction as shown into the figure, which will intersect with each other at respective points.

Step-6 From these respective points of intersections, draw straight lines between all the points in sequence as shown into the figure. It is the shape like a hexagonal prism. But be careful that some of these lines are dotted lines because of hidden.  And give the notations. It is the top view of the 2nd stage.

Step-7 Copy the top view of the 2nd stage as the top view of the 3rd stage, at an angle 60° with the x-y line such that the center line should be inclined at the angle 60°, as show into the figure with the same dimensions. And give all the notations on it. It is the top view of the 3rd stage.

Step-8 From the front view of the 2nd stage, draw horizontal projectors, and from the top view of the 3rd stage draw vertical projectors in upward direction, which will intersect with the previously drawn projectors at respective points.

Step-9 From these respective points of intersections, draw straight lines between all the points in sequence as shown into the figure, It is the shape like a hexagonal prism, as shown into the figure. . But be careful that some of these lines are dotted lines because of hidden. It is the front view of the 3rd stage.

Step-10 Give the dimensions by any one method of dimensions and give the notations as shown into the figure.

Author: Vasim Machhar

An Engineering Drawing Geek. Working at Noble Group of Institutions, Junagadh as Head of Mechanical Engineering Department.