Extrude

After you create a 2D-sketch and apply the appropriate dimensions and constraints, you can Extrude the sketch to create a three-dimensional figure.

During the extrusion process, you control the direction and a taper angle. In addition, you determine whether to Cut, Join or Intersect with existing geometry. When you have completed this tutorial, you will be able to use the extrude feature to create your own solids.

Extrude Part 1

Create a 2D sketch of a rectangle with dimensions: 2 inches x 3 inches.

Change to an isometric view. When you have done so, your sketch should look like this:

Click Finish Sketch.

Select the Extrude tool from the ribbon.

The extrude dialog box will appear. Notice the arrows indicating the direction of the extrusion. Click on each one in turn and you will see how each affects the direction of the sketch extrusion.

On the Extrude Dialog box, you will find Behavior. Here we can change the depth of the extrusion, and the way in which it terminates. When extruding a sketch, your main focus is the distance extruded. Change this number and see what happens to your solid.

Create a final “box” by setting the Distance of the extrusion to 1.35 inches.

A rectangular solid is created.

Save as "Extrude Part 1"

***Additional***

The extrude dialog box will show the arrows indicating the direction of the extrusion. you may have the geometry symetrically or asymetrically extrude from the plane.

Extrude Part 2

Using the Extrude Feature: Taper

Create a sketch of a right triangle with dimensions as shown. Be sure to either create the perpendicular sides or add it as a constraint, if necessary.

Finish Sketch

In 3D model browser select 3D tool extrude

The extrude dialog box will appear.

Change the distance of the extrusion to .5 inches.

Select the Advanced Properties tab on the Extrude dialog box to access the Taper Angle Feature.

Set the taper angle to 10 (degrees). Note the arrow on the model indicating the direction of the taper angle.

*NOTE: A positive number for the taper angle will yield an extrusion that tapers wider than the original sketch, and a negative number for the taper angle will yield an extrusion that tapers narrower than the original sketch.

Click OK. The back face is now larger than the front face, following the direction of the arrow shown above.

Save as "Extrude Part 2"

Extrude Part 3

Extrude: Using Join, Cut, Intersect

Create a new sketch that measures 1.25-in. long x .75-in. tall and Extrude it to a depth of .5-in. Create a new Sketch Plane on the front of the rectangle and sketch a 1 in Circle on the face .

Finish Sketch

In 3D model browser select 3D tool extrude

choose Cut and have the distance be through all

Finish Sketch

In 3D model browser select 3D tool extrude

choose Cut and have the distance be through all

Save as "Extrude Part 3"

Repeat the steps listed above: .5" diameter circle drawn on one face. Call up the Extrude dialog box, and pick the circular region. This time choose Join and a Distance of .5 inches.

Save as "Extrude Part 4"

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