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Chapter
14
Surface Modeling
Learning Objectives
After completing this chapter you will be able to:
• Creating an Extruded Surface.
• Creating a Revolved Surface.
• Creating a Sweep Surface.
• Creating a Blended Surface.
• Creating a Swept Blend Surface.
• Creating a Helical Sweep Surface.
• Creating a Surface by Blending the Boundaries.
• Creating a Surface using Variable Section Sweep.
• Creating surfaces using Style environment.
• Understand surface editing tools.
14-2
Pro/ENGINEER Wildfire for Designers
SURFACE MODELING
Surface models are a type of three-dimensional (3-D) models with no thickness. These models
are widely used in industries like, automobile, aerospace, plastic, medical, and so on.
Surface models should not be confused with the thick models, that is, models having mass
properties. Surface models do not have thickness whereas thick or solid models have a
user-defined thickness. In Pro/ENGINEER, the surface modeling techniques and feature
creation tools are same that are used in solid modeling. A solid model of any shape that is
created can also be created using the surface modeling techniques. The only difference between
the solid model and the surface model will be that the solid model will have mass properties
but the surface model will not. Sometimes, complex shapes are difficult to create using solid
modeling. Such models can be easily created using surface modeling and then convert the
surface model into the solid model. It becomes easy for a person to learn surface modeling if
he is familiar with solid modeling feature creation tools.
CREATING SURFACES IN Pro/ENGINEER WILDFIRE
In Pro/ENGINEER Wildfire, a sketch can be toggled between a solid model and a surface
model. The two tool buttons that are used to toggle between the solid feature and a surface
feature are available on dashboards.
Creating an Extruded Surface
To create an extruded surface, choose the
Extrude Tool
button from the
Base Features
toolbar. The Extrude dashboard is displayed as shown in Figure 14-1.
Figure 14-1
Extrude dashboard
In this dashboard, the
Extrude as solid
button is selected by default. Select the
Extrude as surface
button to extrude the sketch and create a surface model. All the
attributes that are related to a solid model and that were discussed in Chapter 3 are
same for a surface model also. Some examples of these attributes are, sketch plane, both
sides or one side extrusion, depth of extrusion, and so on.
A surface model can be extruded with capped ends or with open ends. Figure 14-2 shows the
open end surface model and Figure 14-3 shows the capped end surface model. Remember
that to create the capped end surface model, the sketch should be a closed loop. Otherwise,
a surface can be created with the open sketch.
To create a surface with capped ends, select the
Capped Ends
check box in the
Options
slide
up panel.
Surface Modeling
14-3
Figure 14-2
Surface with open ends
Figure 14-3
Surface with capped ends
Creating a Revolved Surface
To create a revolved surface, choose the
Revolve Tool
button from the
Base Features
toolbar.
The Revolve dashboard is displayed as shown in Figure 14-4. This feature creation tool works
in the same way as in the case of solid modeling.
Figure 14-4
Revolve dashboard
The
Revolve as solid
button is selected by default, choose the
Revolve as surface
button to create a revolve surface. You can create a revolved capped end surface or an
open end surface. The
Capped End
check box in the
Options
slide-up panel is
available only when the sketch is closed and the angle of revolution is less than
360-degrees. Figure 14-5 shows the open end revolve surface and Figure 14-6 shows the
capped end revolve surface.
Figure 14-5
Revolved surface with open ends
Figure 14-6
Revolved surface with capped ends
14-4
Pro/ENGINEER Wildfire for Designers
Creating a Sweep Surface
To create a sweep surface feature, choose
Insert
>
Sweep
>
Surface
from the menu bar. The
SWEEP TRAJ
menu is displayed. The method to create a surface sweep feature is same as
creating a solid sweep feature. To create a solid sweep feature, refer to Chapter 7. The additional
option of capping the ends that were available in the Extrude and Revolve options is also
available in the Sweep option.
Figures 14-7 and 14-8 shows the sweep surfaces with the open ends and closed ends respectively.
Figure 14-7
Sweep surface with open ends
created using a closed sketch
Figure 14-8
Sweep surface with capped ends created
using a closed sketch
Creating a Blended Surface
To create a surface blend, choose
Insert
>
Blend
>
Surface
from the menu bar. The
BLEND
OPTS
menu is displayed. The method to create a blended surface is same as creating a solid
blend. To create a solid blend feature, refer to Chapter 7. Blended surfaces can be with open
ends or capped ends. Figure 14-9 shows the blended surface with open ends and Figure 14-10
shows the blended surface with capped ends.
Figure 14-9
Blended surface with open ends
Figure 14-10
Blended surface with capped ends
Surface Modeling
14-5
Creating a Swept Blend Surface
To create a swept blend surface, choose
Insert
>
Swept Blend
>
Surface
from the menu bar.
The
BLEND OPTS
menu is displayed. The method to create a swept blend surface is same
as creating a solid swept blend feature. To create a solid swept blend feature, refer to Chapter 8.
Figure 14-11 shows the swept blend with open ends and Figure 14-12 shows the swept blend
with capped ends.
Figure 14-11
Swept blend surface with open
ends
Figure 14-12
Swept blend surface with capped ends
Creating a Helical Sweep Surface
To create a surface helical sweep, choose
Insert
>
Helical Sweep
>
Surface
from the menu
bar. The
Surface
dialog box and the
ATTRIBUTES
menu is displayed. The method to create
a helical sweep surface feature is same as creating a solid helical sweep feature. For more
information on creating solid helical sweep features, refer to Chapter 8. Figure 14-13 shows
the helical sweep surface with open ends and Figure 14-14 shows the helical sweep surface
with capped ends.
Tip
:
If you want to create a surface blend with capped end, you need to create closed
sketch. Pro/ENGINEER does not accept a open sketch for a capped end blend surface.
To create a surface blend with capped ends and keeping the sketch open can also be
done. For this purpose, select the
Open Ends
option and then draw a open sketch.
Give the blend depth and create the blended surface. Now, redefine the surface feature
and modify the open ends attribute to capped ends. Choose
OK
from the
SURFACE
dialog box. The blended surface with the capped ends is created. This is also true
with other features like extrude, revolve, sweep, and so on.
Creating a Surface by Blending the Boundaries
To create a surface by blending the boundaries, datum curves, or points, choose
Boundary Blend
Tool
button from the
Base Features
toolbar. The Boundary Blend
dashboard is displayed as shown in Figure 14-15 and you are prompted to select two
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