Pro_Engineer_Wildfire_Surface_Modeling_Tutorial.pdf

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.

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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

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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

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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

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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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