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Tutorial 8: Assembly Modeling
Introduction
Pro/E's assembly module allows parts to be
grouped into assemblies or subassemblies to model a complete part or
mechanism. In this tutorial, you will learn how to create assemblies,
apply constraints between parts, change view properties of parts, and create
exploded views. These techniques will be applied to a pulley
mechanism.
Creating an Assembly
- For this tutorial, you will need the
parts you created in Problem 2 and
Tutorial 5. You will also need to download
the parts below. Make sure all parts are stored in the same folder.
shaft.prt
bearing.prt
- Start Pro/E Wildfire.
- Select [File] -> [New] and choose
Assembly under the Type category. Name the assembly [Example8].
- You will now begin to add parts to the
assembly. Select the Add Component icon from the tool bar at the right
of the screen, as shown in Figure 8.1.
[Figure 8.1]
- Select the part you made in Problem 2.
This part will be used as a support for the pulley mechanism.
- The Component Placement window will pop up
as shown in Figure 8.2. This window will be used to constrain the
part.
- Select [Coord Sys] from the pull down menu
under the Type category, as shown in Figure 8.2.
[Figure 8.2]
- Select the part's coordinate system and
then the assembly's coordinate system, as shown in Figure 8.3. This
will align the part and fully constrain it.
[Figure 8.3]
- If you have trouble locating the
coordinate systems, or if you have trouble locating a datum at any point
during this tutorial, you can use the icons at the tool bar at the top of
the screen to select what to display. These icons can be used to hide
datum planes, axes, points, and coordinate systems. The icons are
shown in Figure 8.4.
[Figure 8.4]
- Select Okay from the Component Placement
window.
- Now you will add the other support.
Select the Add Component icon again, and select the part from Problem 2
again.
- Select [Align] from the Type category in
the Component Placement window. Click near points A and B in Figure
8.5 to select the bottom surfaces of each support.
[Figure 8.5]
- Make sure the offset of the constraint in
the Component Placement window is set to [Coincident], as shown in Figure
8.6. If it is not set to [Coincident], double click on it and use the
pull-down menu to select [Coincident].
[Figure 8.6]
- Now select [Mate] from the second
pull-down menu in the Type category. Click near points C and D in
Figure 8.7 to select the front faces of the supports. The second
support that you just added should rotate so that the two sides face each
other.
[Figure 8.7]
- If the offset of the constraint is set to
[Coincident] or [Oriented], double click on it and change it to [0.0] as
shown in Figure 8.8.
[Figure 8.8]
- Type [340] into the textbox, as shown in
Figure 8.9, and hit the Enter key. This will specify the distance
between the two supports. You should see the parts as shown in Figure
8.10.
[Figure 8.9]
- Click the plus sign icon in the Components
Placement window to add a new constraint.
- Select [Align] from the Type menu, and
select the axes of the holes of each part, as shown in Figure 8.10.
[Figure 8.10]
- Make sure the offset is set to
[Coincident]. You should see the parts as shown in Figure 8.11.
[Figure 8.11]
- The Placement Status section in the
Component Placement window should now say Fully Constrained. Hit the
OK button.
- Now you will add the bearings.
Select the Add Component icon again, and select the part called bearing.prt.
- Set the first constraint to be
[Insert]. Select the outer surface of the bearing and the inner
surface of the hole in one of the supports, as shown in Figure 8.12.
[Figure 8.12]
- Set the second constraint to be
[Align]. Select the front surface of the bearing and the back surface
of the support, as shown in Figure 8.13.
[Figure 8.13]
- Set the offset to [-7.5]. This
should place the bearing inside the hole, as shown in Figure 8.14.
[Figure 8.14]
- The Placement Status section in the
Component Placement window should now say Fully Constrained. Hit the
OK button.
- Repeat steps 21-25 to add a bearing inside
the other support.
- Now you will add the pulley. Select
the Add Component icon again, and select the pulley you made in Tutorial 5.
- Set the first constraint to be [Align].
Select the central axis of the pulley and the axis through the hole in one
of the supports. You may have a hard time locating the axis of the
hole in the support since the bearing has many axes. Run the cursor
over the location you think it should be until you see a description of an
axis that mentions Problem2, such as what is shown in Figure 8.15.
[Figure 8.15]
- Set the second constraint to be [Align].
Select one face of the pulley and one face of the left support, as shown in
Figure 8.16.
- Change the Offset to be [207.5].
This should place the pulley in the center of the two supports.
[Figure 8.16]
- The Placement Status section in the
Component Placement window should now say Fully Constrained. Hit the
OK button.
- Now you will add the shaft. Select
the Add Component icon again, and select the part called shaft.prt.
- Set the first constraint to be [Insert].
Select the surface of the shaft and the inner surface of a bearing, as shown
in Figure 8.17.
[Figure 8.17]
- Set the second constraint to be [Align].
Select the end face of the shaft and the back face of the support, as shown
in Figure 8.18.
- Change the offset to be [0.0].
[Figure 8.18]
- The Placement Status section in the
Component Placement window should now say Fully Constrained. Hit the
OK button. You should see the assembly as shown in Figure 8.19.
[Figure 8.19]
Modifying Appearances
- In this section you will modify the
appearance of the parts. Select [View] -> [Color and Appearance] from
the menu bar.
- There is currently
only one appearance available - the grey shaded coloring of the parts in the
assembly. To add more colors and textures, select the plus sign arrow
in the Appearance Editor window as shown in Figure 8.20.
-
Select the Color icon to alter the color of the new appearance.
[Figure 8.20]
-
A Color Editor window will pop up, as shown in
Figure 8.21. Use the R, G, and B slide bars to change the amounts of
red, green, and blue to define a new color. Alternatively, you can
select a color from the color wheel.
[Figure 8.21]
- Select the Close button from the Color
Editor window when you are satisfied with the new color. You can use
the other slide bars in the Appearance Editor window to adjust other
properties of the new appearance.
- To set a part to this appearance, select
[Components] from the Assignment category.
- Select a part from the assembly with the
left mouse button, and then click the middle mouse button somewhere on the
screen.
- Select the Apply button from the
Appearance Editor window. The part should change color, as shown
in Figure 8.22.
[Figure 8.22]
- You can repeat this process to allow
different parts to have different appearances. An example of this
is shown in Figure 8.23.
[Figure 8.23]
Exploded Views
- In this section you will create an
exploded view of the assembly. Select [View] -> [View Manager] from
the menu bar.
- Select the Explode
tab in the View Manager window.
-
Right click on the Default view and select [Explode] from the menu, as shown
in Figure 8.24.

[Figure 8.24]
-
You will see an exploded view of the assembly.
However, this view is not very good (some of the parts overlap, it is not
clear where the bearings belong, etc), so you will now define your own
exploded view.
- Right click on the Default view and select
[Unexplode].
- Select the New button under the Explode
tab, type [Exploded1], and hit Enter.
- Right click on the Exploded1 view and
select [Redefine]. This will bring up the Menu Manager.
- Select [Position] on the Menu Manager.
- Select [Plane Normal] as the Motion
Reference in the Explode Position window. Select a plane parallel to
the support, such as the one shown in Figure 8.25.
[Figure 8.25]
- Click on the right support. You can
now move the mouse back and forth to move the part. Click again
farther to the right to set the new location for the support, as shown in
Figure 8.26.
[Figure 8.26]
- Now click on the bearing and move it to
the right.
- Repeat this process for all of the parts
so that they are all separated, as shown in Figure 8.27.
[Figure 8.27]
- Select the OK button from the Explode
Position window, and select [Done/Return] from the Menu Manager.
-
You can unexplode and explode the view by
right clicking on the Exploded1 view and selecting the appropriate command.
- Select [File] -> [Save] from menu bar
to save the assembly.
- Test the information you have learned in
this tutorial by completing Problem 8.
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