### Inventor Lecture #5

```EGR 110 – Inventor Lecture #5
Work Planes
So far we have created sketch planes by:
• Selecting an initial sketch plane in the front, top, or right side view
• Adding sketch planes to surfaces in existing solids
Sometimes a new feature will be located on a plane that is not available on the current
part. In such a case we can add work planes where sketches will be formed in order to
add new features. The simplest type of work planes use the standard orthographic
planes. We will later see other types of work planes and/or work features.
XY, YZ, and XZ Work Planes
Many features can be developed on standard planes in the world coordinate system.
These planes go through the origin, so it is helpful to have a key point in your model
located at the origin.
XY Plane – a plane parallel to the front view
YZ Plane – a plane parallel to the right side view
ZX Plane - a plane parallel to the top view
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EGR 110 – Inventor Lecture #5
Example: Create a pipe with a hole through the side as shown below. A work plane
will be used to draw the hole.
Work plane
1. 2D Sketch: Create the pipe by drawing two
concentric circles with their centers at the origin
Select Origin as
center of circles
2. Extrude: Use an extrusion to form the
pipe
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EGR 110 – Inventor Lecture #5
Example: Create a pipe with a hole through the side (continued)
3. Make the right (YZ) plane visible: Expand (+) Origin in the model browser. As you
pause over each plane it will can be seen on the screen. Right-click on YZ plane and
turn on () Visibility.
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EGR 110 – Inventor Lecture #5
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Example: Create a pipe with a hole through the side (continued)
4. Add a 2D Sketch to the YZ plane:
Select Create 2D Sketch
and pick this plane
EGR 110 – Inventor Lecture #5
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Example: Create a pipe with a hole through the side (continued)
5. Slice Graphics:
Try to add a circle to the center of the side of the pipe and you will find that you can’t locate
the midpoints or endpoints. This problem can be fixed as follows:
• Right-click on the solid and select Slice Graphics. This will remove the portion of the
solid in front of the plane so that you will see only the back half of the pipe.
The back half of the pipe is now displayed
(seen more clearly in the isometric below)
Select Slice Graphics
EGR 110 – Inventor Lecture #5
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Example: Create a pipe with a hole through the side (continued)
6. Project Geometry:
We still can’t locate the midpoints or endpoints of the pipe to add a circle so we need
to use Project Geometry to project some of the pipe features onto the sketch plane.
Select Project Geometry
Pick pipe features to project onto
the sketch plane (color changes to
yellow when selected)
EGR 110 – Inventor Lecture #5
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Example: Create a pipe with a hole through the side (continued)
7. Draw circle
We can now draw the circle at the center of the side of the pipe. A handy way to center the
circle is to locate it at the midpoint of a diagonal construction line that connects endpoints.
Diagonal
construction line
Isometric View
EGR 110 – Inventor Lecture #5
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Example: Create a pipe with a hole through the side (continued)
8. Extrude the circle
Note that even through the circle cannot be seen in the view below (as it is inside the pipe), it
can still be selected as the Profile.
Select circle as Profile
EGR 110 – Inventor Lecture #5
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Example: Create a pipe with a hole through the side (continued)
8. Extrude the circle (continued)
Use the following extrusion options:
- Cut
- Symmetric
- Extents: All
Cut
Symmetric
EGR 110 – Inventor Lecture #5
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Example: Create a pipe with a hole through the side (continued)
9. Final Result
Final Result
Final Result after turning off
Visibility of YZ Plane
EGR 110 – Inventor Lecture #5
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Offset Work Planes
Work planes can be created which are offset from
any desired surface.
Example: Create the part shown to the right using
a work plane. Make all walls and the bottom of the
model 0.125” thick.
The basic steps are illustrated below, but are shown
in more detail in the following slides.
Create
basic solid
work plane
slice graphics, and
draw rectangle
Extrude (cut)
rectangle
Final
result
EGR 110 – Inventor Lecture #5
Example (continued)
1) Create 2D Sketch of Front View
2) Extrude to form basic solid (1.25” used in this example)
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EGR 110 – Inventor Lecture #5
Example (continued)
• Select Plane on Work Features menu
• Select front plane of solid
• Hold down left mouse button and slide the plane behind the face
• Enter the offset distance (-0.125” in this case)
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EGR 110 – Inventor Lecture #5
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Example (continued)
3) Add 2D Sketch to work plane just created
4) Use Slice Graphics to only show solid features behind the plane
5) Use Project Geometry to project key edges onto the work plane
After adding 2D Sketch to Work Plane:
After using Slice Graphics
Project Geometry used
to project key edges
onto work plane
EGR 110 – Inventor Lecture #5
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Example (continued)
6) Draw rectangle. Use dimensions to control two key distances from edges of solid model.
Rectangle and dimensions
Isometric view
EGR 110 – Inventor Lecture #5
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Example (continued)
7) Extrude the rectangle with the following options:
• Select Distance (1.25 – 0.125 – 0.125 = 1.00”)
• Direction (behind plane)
• Cut
Rectangle extruded to form
box to be cut from model
Note that all
walls and the
bottom are
0.125” thick
EGR 110 – Inventor Lecture #5
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Example (continued)
Final Result
Final Result after
turning off Visibility
of Work Plane
EGR 110 – Inventor Lecture #5
Features in Inventor
Recall that Inventor models may contain various types of features, including:
• Placed Features (no 2D Sketch required):
• Holes
• Fillets
• Chamfers
• Etc
• Sketched Features (one or more 2D Sketches required):
• Extrusion (based on one 2D Sketch)
• Revolution (based on one 2D Sketch)
• Sweep (based on two 2D Sketches) – to be covered next
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EGR 110 – Inventor Lecture #5
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Swept Features
Extrusion – Used to project (or sweep) a profile along a linear path.
Sweep – Used to sweep a profile along any path (a curved path, for example)
A sweep is very useful for creating wires, tubing, etc., that follow some path.
A swept feature in Inventor requires two sketches:
• 2D path (along which the profile will be swept)
• Profile (created in a plane that is perpendicular to the plane containing the 2D path)
Extrusion
Sweep
Path
Extrude profile
along a linear path
Sweep along a
sketched path
Profile
Profile
EGR 110 – Inventor Lecture #5
Example: Create a section of tubing
(shown to the right) that follows a
curved path using a sweep.
1. Add a 2D Sketch in the front view and create the
following sketch (the required path):
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EGR 110 – Inventor Lecture #5
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Example: Create a section of tubing that follows a curved path using a sweep (continued).
2. Turn on Visibility for the YZ (right) plane and add a 2D Sketch to this plane.
3. Select Project Geometry and then select the lower part of the path so that you can tell where
it intersects the sketch plane.
Select Project
Geometry from
pick this line
• 2D Sketch added to the YZ plane
EGR 110 – Inventor Lecture #5
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Example: Create a section of tubing that follows a curved path using a sweep (continued).
4. Add two circles to form the Profile. The center of the circles must be on the path. If a green
dot does not appear then perhaps Project Geometry was not correctly used in the last step.
sure that the Green Dot
appears when locating the
centers.
Draw circles
from the
right view
Or draw circles from the isometric view
EGR 110 – Inventor Lecture #5
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Example: Create a section of tubing that follows a curved path using a sweep (continued).
5. Perform the Sweep
• Select Sweep from the 3D Model menu
• Select the Profile
• Select the Path
• Select OK
Sweep appears after selecting the
Profile and Path. Select OK to accept.
Path
Profile
EGR 110 – Inventor Lecture #5
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Example: Create a section of tubing that follows a curved path using a sweep (continued).
6. Final Result
Final Result
Final Result after turning
off Visibility of YZ Plane
EGR 110 – Inventor Lecture #5
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Triple-track window frame
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EGR 110 – Inventor Lecture #5
Example
This simple desk lamp was created using an extrusion, a revolution, and a sweep.
Which operation was used for each part? (Discuss and then see next slide for profiles.)
EGR 110 – Inventor Lecture #5
Example (continued)
Which profiles were used for each operation?
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```