ABSTRACT
A three-view projection of a pressure head is shown in Fig. 15.8. To construct a 3D model of the head: 1. From 3D Views select the Front view. 2. Construct the outline to be formed into a solid of revolution (Fig. 15.7)
and with the Revolve tool, produce the 3D model of the outline. 3. Place the screen in the 3D Views/Top view and with the Cylinder
tool, construct cylinders as follows: (a) In the centre of the solid already constructed – radius 50 and
height 50. (b) With the same centre – radius 40 and height 40. Subtract this
cylinder from that of radius 50. (c) At the correct centre – radius 10 and height 25. (d) At the same centre – radius 5 and height 25. Subtract this
cylinder from that of radius 10. 4. With the Array tool, form a 6 times polar array of the last two
cylinders based on the centre of the 3D model. 5. Place the drawing in the Front view. 6. With the Move tool, move the array and the other two cylinders to
their correct positions relative to the solid of revolution so far formed. 7. With the Union tool form a union of the array and other two solids. 8. Place the screen in the 3D Views/Right view. 9. Construct a cylinder of radius 30 and height 25 and another of radius
25 and height 60 central to the lower part of the 3D solid so far formed.
