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AutoCAD Tutorial

AutoCAD 3D Modeling: Extruded Solids

August 20, 2003

The EXTRUDE command creates 3D solids by extruding closed polylines, circles, ellipses, closed splines, or regions. The following tutorial shows you how.

Notes:

  • This tutorial is designed for AutoCAD 2004 though might be applicable to other releases.
  • In this tutorial user entries are in boldface.
  • The 8 symbol represents pressing Enter.

1. Download r16_extrude.dwg.

Note: If you are using AutoCAD 2002 or an earlier release download r15_extrude.dwg.

2. Open the drawing in AutoCAD. The drawing consists of a region, an open U shape polyline and a closed polyline (rectangle) [Figure 1].


Figure 1

3. Invoke EXTRUDE (Draw menu > Solids > Extrude).

4. Create a pyramid with the taper angle of 10 degrees and height of 3 units [Figure 2]. Select the rectangle as the base object:

Command: _extrude
Current wire frame density: ISOLINES=4
Select objects: 1 found
Select objects:
Specify height of extrusion or [Path]: 3
8
Specify angle of taper for extrusion <0>: 10
8


Figure 2

5. Invoke EXTREUDE again. Extrude the region along the open polyline. Select the polyline as the path of extrusion [Figure 3]:

Command: ext 8
EXTRUDE
Current wire frame density: ISOLINES=4
Select objects: 1 found
Select objects:
Specify height of extrusion or [Path]: p
8
Select extrusion path or [Taper angle]:


Figure 3

6. Change the viewpoint with 3DORBIT [Figure 4].


Figure 4

Note: For more information on 3D views read the following tutorial:
AutoCAD 3D Modeling: 3D Views

About the Author

Alireza Parsai is the founder of cadpanel.com. He is a mechanical engineer with more than 12 years experience with AutoCAD. Alireza is an Autodesk Authorized Author, the AutoCAD consultant for Al Khawarizmi Institute, a contributing editor for Augiworld magazine, a writer for CAD Digest, an instructor for AUGI Training Program, and an elected speaker for Autodesk University 2002. He has written 7 books in Farsi, 3 booklets in English, and more than 100 articles for different magazines and newsletters. You can reach him at alireza.parsai@cadpanel.com or visit his website www.cadpanel.com

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