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Copyright DASSAULT SYSTEMES 2002 1

Wireframe and

Surface Design

CATIA TrainingExercises

Version 5 Release 9

June 2002

EDU-CAT-E-WFS-FX-V5R9


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Table of Contents

1. Master Exercise: Mobile Phone p.3

Creating the wireframe geometry p.7

Creating the surfaces p.12Trimming and joining the body surfaces p.15

Creating the part body p.19

Modifying the geometry p.21

2. Recap Exercise: Button p.23

Creating the wireframe geometry p.24

Creating the surfaces p.26Creating the solid p.28

Modifying the geometry p.31

3. Exercise: Wrench Body p.33

Creating the surface of the handle p.37

Creating a lofted surface to link the parts p.39

Creating the side surface of the head p.42

Creating a connecting surface p.44

Completing the wrench body p.46


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Mob i le Phone Exercise

Mobile Phone: Presentation

Mobile Phone (1): Creating wireframe geometry

Mobile Phone (2): Creating basic surfaces

Mobile Phone (3): Trimming and joining the body surfaces

Mobile Phone (4): Creating the part body

Mobile Phone (5): Modifying the Geometry


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And now practice in the context of the Mobile phone

Enter the

Wireframe and

Surface Design

workbench

Create thesurfaces

2

Trim and join

the body

surfaces

3

Create the part

body4

Enter the Part

Design

workbench

Modify the

geometry

5

Create the

wireframe

geometry

1


5/48Copyright DASSAULT SYSTEMES 2002 5

Exercise

Mobile Phone : Presentation

In this exercise you will see how to create a mobile phone body using the Wireframe and Surface

Design and Part Design workbenches:

Creating wireframe elements (Points, splines, combine curves, circles, lines)

Creating surfaces (swept, extruded, revolved surfaces)

Manipulating surfaces (trim, symmetry, join)Creating solid from surface (Close, fillet, shell)

Modifying the geometry

35 min.



Design Intent : Mobile Phone

Creation of guide and center curves by using combine, lines, sketcher, and splines.

Creation of surfaces using Sweep, Extrude and Revolution

Operations on surfaces using Trim and Join

Creation of solid from surfaces using Close, Fillet and Shell

Modification of the geometry by changing parameters of the surface definition


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1- Create these points : (0,0,9), (40,0,7.5), (60,0,6), (80,0,5.8) and (90,0,5.8).

2- Draw a spline passing through these points imposing a tangency condition with the X axis at

the two extremities.

3- Create these points : (0,17,0), (20,20,0), (40,19,0), (60,18,0) and (90,18,0).


the last extremity.

5- Create a combine curve using the two previous spline curves. Rename it Guide curve 16- Create these points : (0,0,-3), (70,0,-4) and (90,0,-4).


the last extremity.

8- Create a combine curve using the last created spline curve and the second spline curve.

Rename it Guide curve 2.

Do It Yourself (1/4)

Guide curve 1

Guide curve 2

Part used: Mobile_phone_step1-1.CATPart



7- Create this sketch in the YZ plane :

Rename it Profile 1.

8- Create this circle centered on the point (70,0,0):

9- Create the circle centered on the point (20,0,0):





7- Create a combine curve using the first created spline and the second circle.


8- Create a combine curve using the third created spline and the second circle.


9- Create a combine curve using the first created spline and the first circle.


10- Create a combine curve using the third created spline and the first circle.


11- Create a line starting from the point (0,0,-300) and X directed (whatever its

length, it will be used as an axis).



Create this sketch in the YZ plane and rename it Profile 2.




Exercise

Mobile Phone: Creating the surfaces

Create swept, extruded and revolved surfaces.

10 min.




P1 users have to

load the next

CATIA Part to go

on.

1- Create a swept surface using Guide curve 1

and Guide curve 2 as guide curves, the sketchProfile 1as profile and its two vertex points as

anchor points.

2- Create a circle swept surface using Guide

curve 3 and Guide curve 4 as guide curve andProfile 2 as profile and its two vertex points as

anchor points.

3- Create a circle swept surface using Guide

curve 5 and Guide curve 6 as guide curve and

Profile 2 as profile and its two vertex points as

anchor points.

Note : switch on the option Position Profile for

thetwoprevious swept surfaces.



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4- Extrude the spline 3 using the ZX plane as

direction (Length=25mm).

5- Create a revolution surface using Spline 1

as profile and Line 1 as axis (Angle 1=0deg

and angle 2=5deg).


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Exercise

Mobile Phone: Trimming and joining the body surfaces

Trim the surfaces by selecting the

surface area you want to keep.

5 min.


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1- Trim the first created swept surface with the revolution surface.

2- Trim the previous trim surface with the extruded surface.



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3- Trim the previous trim surface with the first circle swept surface.

4- Trim the last trim surface with the second circle swept surface.


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5- Symmetrize the resulting surface using the XZ plane as reference and join it with

the last trim surface.


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Exercise

Mobile Phone: Creating the part body

Close the body surface into a solid,

then fillet and shell the solid.

5 min.

D It Y lf P t d M bil h t 4 1 CATP t


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Do It Yourself

Access the Part Design workbench and define in work object the Solid body.

1- Close the surface Body surface.

2- Add variable fillets on the two side top edges (from 4mm to 2mm)

3- Add 1mm edge fillets on these four edges :


E i


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Exercise

Mobile Phone: Modifying the geometry

Modify the geometry by modifying a

construction element.

5 min.

D It Y lf Part used: Mobile phone step5 1 CATPart


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Do It Yourself

1- Display the second spline and its points.

2- Double-click on Point.6 to change its Y component value to 16mm.

You will modify the overall shape of the part by changing the parameters of a

construction element.


R E i


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Recap Exercise

In this exercise you will see how to create a button body using the

Wireframe and Surface Design and Part Design workbenches:

Creating the profiles

Extruding the profile

Creating the solid part

Modifying the geometry

25 min.

Exercise


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Exercise

Button (Step 1) : Creating the wireframe geometry

In this step you will:

Create the points

Create the profile curvesCreate the direction lines

5 min.

Do It Yourself


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Do It Yourself

1- Create 5 points : Pt1(0,0,5), Pt2(0,10,9), Pt3(0,23,7), Pt4(0,30,8), Pt5(-20,30,7)

2- Create a spline passing through Pt1 to Pt43- Create a line passing through Pt4 and Pt5

4- Draw a sketch on XY plane with two coincidences and a radius of 20mm

5- Draw a vertical line on YZ plane

Pt1

Pt2Pt3

Pt4Pt5

Spline.1

Line.1Pt5

Pt1

Sketch on XY plane (4-) Line on YZ plane (5-)Points, Spline, Line (1-, 2-, 3-)

Create the wireframe geometry:

Button_step1.CATPart

Exercise


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Exercise

Button (Step 2) : Creating the surfaces


Create extruded surfaces

5 min.

Do It Yourself


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Do It Yourself

1- Create the first extruded surface : select profile Sketch.1 and direction Sketch.2

2- Create the second extruded surface : select profile Spline.1 and direction Line.1

Spline.1

Line.1

Sketch.1

Sketch.2

Surface Extrude. 1 (1-) Surface Extrude. 2 ( 2-)

Create the basic surfaces:

Button_step2-3.CATPart

Exercise


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Exercise

Button (Step 3): Creating the solid


Create a pad using the existing surfaces as limits

Add fillets on edges

Shell the part

10 min.



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Sketch.3 on XY plane (1-) Sketch.4 YZ plane (2-)

1- Create a sketch (rectangular contour) on the XY plane

2- Create a sketch (trapezoidal contour) on the YZ plane





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Pad up to surface (3-) Split of pad (4-) Fillets (6-)

3- Create a pad on Sketch.3, up to the Extrude.2 surface

4- Split Pad.1 with Extrude.1 as splitting surface

5- Create a pad on Sketch.4 up to the Extrude.1 surface

6- Make 1.5 mm fillets on the 6 horizontal and vertical edges

7- Shell the bottom faces with 1mm (5 faces)


Pad up to surface (5-) Shell (7-)

Exercise


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Exercise

Button (Step 4): Modifying the geometry


Modify the geometry by moving the definition points of the spline and changing parameters in

the Sketcher

5 min.

Do It Yourself


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1- Double click on Pt3 and change the Z value to 5mm to modify the shape of the spline

2- Open Sketch.1 to change the radius value to 25mm

Pt3

Sketch.1 (2-)Point on spline (1-)


Wrench Body Exercise


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Wrench Body Exercise

Wrench Body: Presentation

Wrench Body (1): Creating the Surface of the Handle

Wrench Body (2): Creating a Lofted Surface to Link the Parts

Wrench Body (3): Creating the Side Surface of the HeadWrench Body (4): Creating a Connecting Surface

Wrench Body (5): Completing the Wrench Body

Exercise


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Exercise

Wrench body : Presentation

In this exercise you will learn how to create a

wrench body using the Wireframe and Surface

Design and Part Design workbenches :

Creating wireframe elements (point, line, spline)Creating surfaces (revolution, loft, sweep)

Manipulating surfaces (symmetry, join)

Creating solid from surface (close, extrude)

35 min.

Design Intent : Wrench Body


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Creation of guide, section and spine curves using spline, sketcher, project and split

Creation of revolution, loft and sweep surfacesCreation of solid from surfaces using close and thick

And now practice in the context of the Wrench Body


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Enter the

Wireframe and

Surface Design

workbench

Enter the Part

Design

workbench

Create the

surface of the

handle

1

Create a loftedsurface to link

the parts 2Create the side

surface of the

head

3

Create a

connecting

surface

4

Complete the

wrench body

5

Exercise


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Wrench body : Creating the Surface of the Handle

Create the surface of the handle by

revolving a spline defined in 3D.

10 min.

Do It Yourself Part used: Wrench_body_step1.CATPart


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1- In the WIREFRAME Open Body create three points : (115,7,0), (122,6,0) and

(127,5,0). Rename them Point A, Point B and Point C.

2- Create a spline selecting Vertex 1 then points A to C and finally Vertex 2.

3- Impose horizontal tangency at the end points of the spline.4- In the SURFACES Open Body create a surface, revolving the spline 360

degrees around the horizontal line of the sketch. (360-degree revolution is

needed for the downstream close operation to create a solid in Part Design).

Revolving surface (4-)Points, Spline (1-, 2-, 3-)

Spline 1

Vertex 2 Vertex 1

ABC

Exercise


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Wrench body : Creating a Lofted Surface to Link the Parts

Create a lofted surface to associate

the head with the link.

10 min.

Do It Yourself (1/2) Part used: Wrench_body_step2.CATPart


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Plane and Sketch.3 (1-, 2-) Middle points (4-)Sketch.4 (3-)

1- In the WIREFRAME Open Body create a plane with a 7.2mm distance from the end

face of the link.

2- On the created plane create an arc of a circle (radius =7.2). Define three coincidences,

two between the end points of the arc and the H-axis of the Sketcher and one between

the center point of the arc and the V-axis of the Sketcher.

3- On the bottom face of the head, create an arc passing through the two vertices of the

face (radius =24). Define four coincidences, two between the arc and the vertices of the

bottom face and two between the end points of the arc and the H-axis of the Sketcher.

4- Create the middle points of Sketch.3, Sketch.4 and of the edge curve of the link end

face.

Offset plane

Link end faceSketch.3

Sketch.4

Head bottom face

Middle points



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P1 users should

create the three

sections loft in

two times.

Splines and line (5-, 6-) Symmetry and join (8-, 9-)Lofted surface (7-)

5- Create three splines, two passing through the two sets of end points of the three arcs

and one passing through the set of middle points created on the three arcs. The three

arcs are Sketch.3, Sketch.4 and the edge curve of the link end face. Impose an horizontal

tangency to each spline on the link end.

6- Create a line normal to the end face to the link (length=20) from Point.1.

7- In the SURFACES Open Body create a lofted surface by selecting three sections(Sketch.4, Sketch.3 and the edge curve of the link end face), three guide curves

(Spline.2, Spline.3 and Spline.4) and a spine (Line.1).

8- Apply a symmetry to the lofted surface with respect to the XY plane.

9- Join the lofted surface and the symmetry.

Spline.2

Spline.3

Spline.4

Line.1

S1

S2

S3

G1

G2

G3

Spine

Exercise


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Wrench body : Creating the Side Surface of the Head

Create the side surface of the head by a sweeping a profile.

The profile and guide curves are created from the existing

curves by projection and re-limited.

10 min.



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1- In the WIREFRAME Open Body extract with tangency continuity the upper and lower

edges of the head..

2- Split sketch.4 with the side face of the head.3- In the SURFACES Open Body define the side surface: create a sweep with a profile

(Split.1=sketch.4 split) and two guide curves (Extract.1 and Extract.2).

Extracted edges

Side face of the head

Split of Sketch.4

Side surface

Exercise


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Wrench body : Creating a Connecting Surface

Create a connect surface at a junction by

sketching the profile and revolving it.

10 min.



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1- In the WIREFRAME Open Body sketch the fillet profile on XY plane.

- activate the option Construction elements.

- create lines on the bottom and top horizontal edges and on the vertical edge of the

link by intersecting the 3D elements.

- define two coincidences between the profile and the bottom horizontal edge and

between the profile and the vertical edge, two horizontal tangencies at the ends of

the profile and two radius constraints (18mm and 5 mm).

2- In the SURFACES Open Body create the surface by revolving Sketch. 5 around the

horizontal axis of Sketch.1 (360deg).

Sketch. 5

Sketch.5 (1-) Surface of revolution (2-)

Exercise


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Wrench body : Completing the Wrench Body

Create solids by extruding and closing the surfaces.Remove the exceeding solid by pocketing.

5 min.

Do It Yourself (1/2) Part used: Wrench_body_step5.CATPart


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Sweep.1PartBody

1

Thick / Mirror / Close (2-, 3-, 4-)

Revolute.1

Revolute.2

Join.1

1- Exit the Wireframe and Surface Design workbench and enter the Part Design workbench.

2- Thick the surface Sweep.1 by 1.5 mm inwards.

3- Mirror the PartBody.

4- Close the surfaces Revolute.1, Revolute.2 and Join. 1.

Initial Part



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5- Sketch two rectangular contours on the XY plane and build four coincidences, two

between the contours and the V-axis of the Sketcher and two between the contours and

the corresponding horizontal edge of the head.

6- Remove the exceeding solid by pocketing (depth=20mm, Mirrored extent).

Sketch.6 (5-) Pocket (6-)

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