Page 123 - CITS - ED - Mechanical

ENGINEERING DRAWING - CITS

Formula for finding angle
Radius of base cone circle x360
Slant height

Exercise 7.14
Draw the development of intersecting cylinders of dia 30 mm at 120°. (Fig 14a)

All the cylindrical pipes are of same diameter and intersecting each at equal angles. Hence in this case the de-
velopment of all the pipes are same and so the development of one pipe will represent other pipes.
• Draw the plan and elevation of the pipe `A' and mark the division on the plan. (Fig 14b)
• Draw the vertical projectors from the plan to front view to meet the line of intersection.

• Draw horizontal projectors from these points on to the development.
• Mark the intersecting points and join with a smooth curve to complete the required development. (Fig 14c)

Fig 14

Exercise 7.15
Two square prism of A & B positioned as stated below intersects each other. Draw the plan, elevations and show
the line of intersection. Prism `A' is resting on its square base and its face are at 45° to XY line. (HP) Prism `B'
intersects at 10 mm from base at 45°. The dimensions of prisms are:
– Side 40 mm height 60 mm (Prism A)
– Side 35 mm height 80 mm (Prism B)

Draw the top view of 40 mm square prism, with its two sides at 45° to (VP) X'Y' line.
• Mark the corners as a,b,c & d.

110
CITS : Engineering Drawing (Mechanical) - Exercise 7