Three-dimensional space - Introduction to AutoCAD 2011: 2D and 3D Design - page 350

Octagon edge length 40

Hole Ø70

R20

10

40
60

Sq head bolts M10

Holes Ø10

10

10

Hole Ø30

R5 R10

Fig. 17.7 Second example UCS - The orthographic projection of a steam venting valve

3. Construct the central part of the valve - a fi lleted 80 square extrusion
with a central hole.
4. At the command line:

Command: enter ucs right-click
Current ucs name: *WORLD*
Specify origin of UCS or [Face/NAmed/OBject/
Previous/View/World/X/Y/Z/ZAxis] <World>:
enter x right-click
Specify rotation angle about X axis <90>:
right-click
Command:

and the model assumes a Front v i e w .
5. With the Move tool, move the central portion vertically up by 10 .
6. With the Copy tool, copy the base up to the top of the central portion.
7. With the Union tool, form a single 3D model of the three parts.
8. Make the layer Construction current.
9. Place the model in the UCS *WORLD* view. Construct the separate
top part of the valve - a plate forming a union with a hexagonal plate
and with holes matching those of the other parts.

10. Place the drawing in the UCS X view. Move the parts of the top into

their correct positions relative to each other. With Union and Subtract
complete the part. This will be made easier if the layer 0 is turned off.