6-6-wireframe and design ex

Copyright DASSAULT SYSTEMES 2002 1

Wireframe and Surface Design

CATIA Training Exercises

Version 5 Release 10December 2002

EDU-CAT-E-WFS-FX-V5R10

Table of Contents

1. Master Exercise : Mobile Phone p. 31. Mobile Phone : Presentation p. 42. Mobile Phone : Creating the wireframe geometry p. 83. Mobile Phone : Creating the surfaces p. 124. Mobile Phone : Trimming and joining the body surfaces p. 175. Mobile Phone : Creating the part body p. 216. Mobile Phone : Modifying the geometry p. 24

2. Recap Exercise p. 261. Button (Step 1) : Creating the wireframe geometry p. 272. Button (Step 2) : Creating the surfaces p. 293. Button (Step 3): Creating the solid p. 314. Button (Step 4): Modifying the geometry p. 34

3. Wrench Body Exercise p. 361. Wrench body : Presentation p. 372. Wrench body : Creating the Surface of the Handle p. 413. Wrench body : Creating a Lofted Surface to Link the Parts p. 444. Wrench body : Creating the Side Surface of the Head p. 485. Wrench body : Creating a Connecting Surface p. 516. Wrench body : Completing the Wrench Body p. 53

Master Exercise : Mobile PhoneMobile Phone: Presentation

Mobile Phone (1): Creating WireframeGeometry

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

ExerciseMobile 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, circles, projected curve) Creating surfaces (swept, extruded, blend, loft) Manipulating surfaces (trim, symmetry, join) Creating solid from surface (Close, fillet) Modifying the geometry

35 min

Design Intent : Mobile Phone

• Creation of guide and profile curves by using sketcher and spline.

• Creation of surfaces using Sweep, Extrude, Blend and Loft

• Operations on surfaces using Trim, Symmetry and Join

• Creation of solid from surfaces using Close and Fillet

• Modification of the geometry by changing parameters of the surface definition

And now practice in the context of the Mobile phoneEnter the

workbench

Create the surfaces

2Trim and join

the body surfaces

3Create the part

Enter the Part Design

workbench

Modify the geometry

Create the wireframe geometry

workbench

Trim and join the body surfaces

3Create the part

workbench

Modify the geometry

Create the surfaces

ExerciseMobile Phone : Creating the wireframe geometry

Create the guide curves and profiles.

10 min

Do It Yourself (1/2)

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-Project Guide Curve 2 into ZX plane normally.

4-Create this sketch in the YZ plane and rename it “Profile”:

Guide curve 1

Guide curve 2

Part used: Mobile_phone_step1-1.CATPart

Do It Yourself (2/2)5- Create this circle centered on the point (70,0,0):

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

workbench

Trim and join the body surfaces

3Create the part

workbench

Modify the geometry

Create the surfaces

ExerciseMobile Phone : Creating the surfaces

Create swept, extruded, loft and blend surfaces.

10 min

1- Create a swept surface using “Guide curve 1” and “Guide curve 2” as guide curves, the sketch “Profile”as profile and its two vertex points as anchor points.Rename it “Side”.

2-Extrude the Spline curve in the ZX direction with these parameters:

3-Create a Blend surface between the Spline curve and “Guide Curve 1”, using the previous extrusion as tangency surface and rename it “Top”:

4-Create a loft surface between the “Guide Curve 2” and the Projected curve. Rename it “Bottom”:

5-Extrude the two circle arcs in the XY direction using these parameters:

workbench

Create the surfaces

2Trim and join

the body surfaces

3Create the part

workbench

Modify the geometry

ExerciseMobile Phone : Trimming and joining the body surfaces

Join, Trim and Mirror the surfaces.

Do It Yourself (1/2)1- Join the surfaces “Side”, “Top” and “Bottom”:2- Trim the previous join surface with the first extruded surface from the circle arcs:

3-Trim the previous trim surface with the remaining extruded surface:

4- Symmetry the resulting surface with the ZX plane and join the surfaces:

workbench

Create the surfaces

2Trim and join

the body surfaces

3Create the part

workbench

Modify the geometry

ExerciseMobile Phone : Creating the part body

Close the body surface into a solid, then fillet the solid.

Do It YourselfAccess 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 these 2mm edge fillets :

workbench

Create the surfaces

2Trim and join

the body surfaces

3Create the part

workbench

Modify the geometry

ExerciseMobile Phone : Modifying the geometry

Modify the geometry by modifying a construction element.

Do It Yourself

1- Edit this point double-clicking on it:

2- Modify its Z coordinate from 7.5 to 8.5 and its X coordinate from 40 to 39:

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

See that the wireframe modifications are impacting the body:

Recap ExerciseIn 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.

ExerciseButton (Step 1) : Creating the wireframe geometry

In this step you will: Create the points Create the profile curves Create the direction lines

5 min.

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 Pt54- Draw a sketch on XY plane with two coincidences and a radius of 20mm5- Draw a vertical line on YZ plane

Pt2 Pt3

Pt4 Pt5

Spline.1

Line.1 Pt5

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

Create the wireframe geometry:

Button_step1.CATPart

ExerciseButton (Step 2) : Creating the surfaces

In this step you will: Create extruded surfaces

5 min.

Do It Yourself

1- Create the first extruded surface : select profile Sketch.1 and direction Sketch.22- 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

ExerciseButton (Step 3): Creating the solid

In this step you will: Create a pad using the existing surfaces as limits Add fillets on edges Shell the part

10 min.

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

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

3- Create a pad on Sketch.3, up to the Extrude.2 surface4- Split Pad.1 with Extrude.1 as splitting surface5- Create a pad on Sketch.4 up to the Extrude.1 surface6- Make 1.5 mm fillets on the 6 horizontal and vertical edges7- Shell the bottom faces with 1mm (5 faces)

Pad up to surface (5-)

Shell (7-)

ExerciseButton (Step 4): Modifying the geometry

In this step you will: Modify the geometry by moving the definition points of the spline and changing parameters in the Sketcher

5 min.

1- Double click on Pt3 and change the Z value to 5mm to modify the shape of the spline2- Open Sketch.1 to change the radius value to 25mm

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

Do It Yourself

Wrench Body Exercise

Wrench Body: PresentationWrench Body (1): Creating the Surface of the HandleWrench Body (2): Creating a Lofted Surface to Link the PartsWrench Body (3): Creating the Side Surface of the HeadWrench Body (4): Creating a Connecting SurfaceWrench Body (5): Completing the Wrench Body

ExerciseWrench 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

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

• Creation of revolution, loft and sweep surfaces

• Creation of solid from surfaces using close and thick

And now practice in the context of the Wrench BodyEnter the

workbench

Create the surface of the

handle

Create a lofted surface to link

the parts 2Create the side surface of the

Create a connecting

surface

Complete the wrench body

And now practice in the context of the Wrench BodyEnter the

workbench

the parts 2Create the side surface of the

Create a connecting

surface

handle

ExerciseWrench body : Creating the Surface of the Handle

Create the surface of the handle by revolving a spline defined in 3D.

Do It Yourself

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

Part used: Wrench_body_step1.CATPart

And now practice in the context of the Wrench BodyCreate the

surface of the handle

the parts

Enter the Wireframe and Surface Design

workbench

2Create the side surface of the

Create a connecting

surface

ExerciseWrench body : Creating a Lofted Surface to Link the Parts

Create a lofted surface to associate the head with the link.

10 min

Plane and Sketch.4 Middle pointsSketch.5

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 face Sketch.4

Sketch.5

Head bottom face

Middle points

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

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- In the SURFACES Open Body, create a loft using the splines 2 and 3 as sections, the ZX plane as tangent direction for the spline.3, and the 3 circle arcs as guide curves. 7- Create a loft using the splines 3 and 4 as sections, the ZX plane as tangent direction for the spline.3, and the 3 circle arcs as guide curves.8- Apply a symmetry to the lofted surface with respect to the XY plane. 9- Join the lofted surfaces and the symmetries.

Spline.2

Spline.4Spline.3

Loft 1

Loft 2

And now practice in the context of the Wrench Body

Create the side surface of the

the parts

handle

workbench

Create a connecting

surface

ExerciseWrench 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

Do It Yourself

1- In the WIREFRAME Open Body extract with tangency continuity the upper and lower edges of the head..2- Split sketch.5 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.5 split) and two guide curves (Extract.1 and Extract.2).

Extracted edges

Side face of the head

Split of Sketch.5

Side surface

And now practice in the context of the Wrench Body

Create a connecting

surface

Create the side surface of the

the parts

handle

workbench

ExerciseWrench body : Creating a Connecting Surface

Create a connect surface at a junction by sketching the profile and revolving it.

Do It Yourself

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. 6 around the horizontal axis of Sketch.1 (360deg).

Sketch. 6

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

ExerciseWrench body : Completing the Wrench Body

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

Sweep.1PartBody

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

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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