CatiaSurface

Generative Shape

Design

CATIA Training

Exercises

Table of Contents

Master Exercise : the Mobile Phone p.4

Creating the Wireframe Elements p.7

Creating the Surfaces p.11

Performing Operations p.13

Analyzing and Modifying p.18

Offsetting a Solid p.21

Wireframe Geometry Recap Exercise p.24 Surface Geometry Recap Exercise p.26

Operation Recap Exercise p.29

Managing Features Recap Exercise p.33

The Knob p.

Generating the Wireframe p.7

Extruding Basic Surfaces p.11

Performing Operations p.13

Table of Contents

The Plastic Bottle p.35

Creating the Bottom of the Bottle p.38

Creating the Body of the Bottle p.43

Creating the Bottleneck p.47

Assembling the Three Open Bodies p.57

Creating the Bottleneck Screw p.63

The Space Mouse p.68

Creating the Base Pad and the Upper Fillet p.71

Creating the Surfacic Elements p.74

Sewing the Surface on the Pad p.78

Step 4 to 7 p.80

Creating the Holes and Pockets p.85

Assembling a New Body to the Part Body and Patterning it p.90

The Shampoo Bottle p.94

The Lemon Squeezer p.98

Completing the Wireframe Geometry p.101

Creating the Basic Surfaces p.107

Creating a Blend Surface with Coupling Points p.111

Master Exercise

60 min.

In this exercise you will have the opportunity to complete a telephone part by creating the place for its screen.

You will create the supporting Wireframe and build the base surfaces. Next, you will trim,.

You will then perform a Draft analysis on the surfaces to determine if the telephone can be extracted from a mould.

You will modify a supporting sketch and will see the automatic propagation of this change through to the final Skin.

Design Intent: The Mobile Phone

Adaptative sweep and 0.5mm fillet. Variable fillet (from

2mm to 4mm)

0.1 mm. Thickness 2mm fillet

Sewed surface 1mm fillet

Design Process: The Knob

Creating the Surfaces

Analyzing and splitting the part Performing operations :

Symmetry, trim, fillet, join

Create a solid from the surface. 4 3 2 5 Generating the Wireframe 1

Master Exercise

The Mobile Phone (Step 1): Creating the Wireframe Elements

In this step you will create :

•Parallel curves on a support •Extracted curves •Connect Curves •Corners •Circles •Projected curves 10 min.

Do It Yourself (1/4)

Extract these edges from the original surface :

Extract this face from the blue surface :

You created the basic elements to complete the wireframe geometry. Now you can hide the blue datum surface.

Do It Yourself (2/4)

Create a parallel curve from the top extracted edge using the extracted face as support (offset=45mm) :

Create the vertex point of the created parallel curve :

Create a parallel curve from the side extracted edge using the extracted face as support (offset=1.5mm) :

Create a parallel curve from the top extracted edge using the extracted face as support (offset=2mm)

Do It Yourself (3/4)

Create a connect curve using the first and the last parallel curve as support and project this connect curve to the extracted face :

Do It Yourself (4/4)

Create a point on the YZ plane :

Create a circle using the previous point as center and the YZ plane as support (radius=4mm) :

Master Exercise

The Mobile Phone (Step 2): Creating the Surfaces

In this step you will create :

•An adaptative sweep •A swept surface •A fill surface

Do It Yourself (1/6)

Insert a new open body and rename it “Surfaces”. Define in work object this open body.

You are going to create points that are necessary to define the sections of the adaptative sweep :

Create two points on the corner curve using the ratio 0.8 and 0.2.

You are now going to create the

adaptative sweep based on these two points, the corner curve’s vertices and the corner curve :

• Open an adaptative sweep dialog box clicking on the adaptative sweep icon :

Load:

CATGSD_F_Phone_Step2_start.CATPart

0.2 point 0.8 point

Do It Yourself (2/6)

Select the corner curve as guide curve. Right click in the “sketch” field and select “create sketch”.

This dialog box appears :

Select this vertex as point defining the first sweep section :

Do It Yourself (3/6)

When in the sketch, design this profile :

Exit the sketcher.

Do It Yourself (4/6)

You are back in the adaptative sweep dialog box. Select the 0.8 ratio point to define the second section ….

….. then select the 0.2 ratio point to define the third section …

….. finally select the corner curve’s vertex to define the

Do It Yourself (5/6)

In the adaptative sweep dialog box, modify the sections parameters :

1st _{section parameters}

2nd _{section parameters}

3rd section parameters

4th section parameters Parameters correspondence

Do It Yourself (6/6)

Click OK to confirm the adaptative sweep surface creation :

Create a linear sweep using the circle as guide curve and the YZ plane as reference surface (length1=7mm, length2= 5mm, angle=100deg) :

Finally, create a fill surface using the upper boundary of the previously created sweep :

Master Exercise

The Mobile Phone (Step 3): Performing operations

In this step you will perform :

•A symmetry •Join operations

•Trim and split operations •A variable fillet

•Edge filets

Do It Yourself (1/4)

Insert a new open body and rename it “operations”. Define in work object this open body.

Apply a symmetry an the adaptative sweep using the ZX plane as reference. Join the two surfaces :

Join the linear sweep and the fill surface.

Do It Yourself (2/4)

Split the second join surface with the previous trim surface :

Create a variable radius fillet on these two edges (from 2mm at the phone top to 4mm at the phone bottom) :

Do It Yourself (3/4)

Create a 1mm edge fillet on these two edges :

Do It Yourself (4/4)

Create a 0.5mm edge fillet

Master Exercise

The Mobile Phone (Step 4): Analysis and Modifications

In this step you will :

•Perform a draft analysis on the surface. •Modify the adaptative sweep parameters.

•Create a reflect line to split the surface and make it extractible from a mold.

Do It Yourself (1/5)

Insert a new open body and rename it “Analysis”. Define in work object this open body.

Create a reflect line using the surface as support, Z as direction and an angle of 90deg :

Load:

CATIA asks you if you want to keep only one sub-element of the generated reflect line. Click YES and use the point (0,0,0) to define the near element :

Do It Yourself (2/5)

Use this reflect line to split in two parts the surface, keeping both sides. Two split entities are generated. Rename the top surface “top” and the bottom one “bottom”.

Hide the top surface.

Perform a draft analysis on the bottom surface :

Do It Yourself (3/5)

Perform a draft analysis on the top surface :

There is a red area in this analysis : that means that the upper surface cannot be extracted. It needs to be modified.

Click on this button to invert the analysis direction

Do It Yourself (4/5)

Access the surface open body and edit the adaptative sweep. Modify the section.1 and section.2 angle parameter :

Do It Yourself (5/5)

Confirm the Adaptative sweep modification by clicking OK in the adaptative sweep dialog box.

The complet surface is updated and the analysis becomes :

Master Exercise

The Mobile Phone (Step 5): Offsetting a Solid

In this step you will :

•Add thickness on the surfaces. •Perform a Boolean operation. •Sew a surface.

•Create an edge fillet.

Do It Yourself (1/2)

Access the part design workbench. Insert a new body.

In this new body, apply a thickness to the top surface :

Define in work object the part body.

Apply the same thickness to the bottom surface :

Load:

Do It Yourself (2/2)

Add these two bodies :

In the operation Open Body, show the splitted antenna : Sew this surface to the previously created solid :

Exercise

Wireframe Geometry Recap Exercise

Create Extremums

Create a Connect Curve using these Extremums as endpoints

Do It Yourself

Create a Maximum Z Extremum on the left curve and a Minimum Z Extremum on the right curve

Create a Connect Curve using the Extremums (Tangency Continuity; Trim Option)

Exercise

Surface Geometry Recap Exercise

Create:

Offset, Blend, Sweep, and Loft Surfaces

Do It Yourself (1/2)

Offset 7 surfaces (1 mm.) from the inside of the Solid Clamp.

Create a Blend Surface (Tangent Limits) to close off the Offset Surfaces. Extra Credit: Insert a JOIN operation to assemble all the Offset surfaces and the Blend surface into one single surface.

Do It Yourself (2/2)

Extract a Boundary Curve from this JOIN surface.

Create a Segment Sweep Surface using the black circle as a profile, the Output1-Plane as reference surface, a –88 degree angle and 100mm for length1.

Create a Loft tangent to the Join and the Sweep surfaces and using Spline.1 as the Spine. (Make sure that the Closing Points are on the same side and that the section curves are oriented in the same direction - see arrows - otherwise you will have a twisted Loft).

Exercise

Operation Recap Exercise

This Dolphin is a fun part that would normally be most efficiently created as a solid. However, creating it as a surface model, although leading to a heavier model, will allow us to practice creating all the different types of Fillets available:

Shape, Edge, Variable, Face-to-Face, and Tri-Tangent.

Do It Yourself (1/3)

For this exercise, go to the menubar and change the Units to Inches. (Note: The model is quite heavy so be patient during your interactions.)

Create a Face-Face Fillet (Radius 0.9 in.) selecting faces on the two upper fins.

Trim this Fillet with all the side fins (Join.15)

Do It Yourself (2/3)

Create two Variable Fillets on these edges from (R=0.1in.) at the bottom to (R=0.03in.) at the top.

Do It Yourself (3/3)

Create a (R=0.25in.) Shape Fillet between the last Tri-Tangent and the Nose surface of the Dolphin - use the Trim option to obtain a single surface as the result.

Create (R=0.25in.) Edge Fillets between the body and the two front side fins.

Exercise

Managing Features and Open Bodies Recap Exercise

You will use the Group management tool to organize the specification tree of the Dolphin part Shape, Edge, Variable, Face-to-Face, and Tri-Tangent.

Do It Yourself

Create a Group “SurfaceModel” from the Open Body leaving out the six sketches.

Rename the sketches to the names below and change the sketch color and line width for easy visualization.

Go into the Front_Top_Fin sketch and drag the top right control point. Exit the sketch and update the part.

Exercise

The Knob

In this exercise you will have the opportunity to model an appliance Knob starting from an empty model. You will create the supporting Wireframe and build the base surfaces for a quarter section of the Knob. Next, you will trim, fillet, and perform symmetry operations on these surfaces to obtain the complete Knob. You will then perform a Draft analysis on the surfaces to determine if the Knob can be extracted from a mould. In order to obtain a 4 Degree draft, you will modify a supporting line segment and will see the automatic propagation of this change through to the final Skin.

Finally, you will see how to work in a Hybrid environment by creating a Solid by offsetting the Skin. A completed model “Knob_Completed.CATPart” is available for reference.

Design Intent: The Knob

Design Process: The Knob

symmetry

3

Analysing and modifying draft

4

Offset a solid

Exercise

The Knob (Step 1): Generating the Wireframe

In this step you will sketch

and constrain the wireframe

geometry that will support the

surface.

Do It Yourself (1/3)

Using the ZX Plane as Support, draw on the fly a quarter circle with R=64 mm, centered on the origin ; as shown.

Rem. : ➨ Do not use the sketcher. ➨ Use the stacking commands functionality

Do It Yourself (2/3)

Using the YZ Plane as Support, draw the highlighted arc on the right at the

position shown.

Rem. : ➨ Do not use the sketcher. ➨ Use the stacking commands functionality

Do It Yourself (3/3)

Using the YZ Plane, Sketch the line on the right and set all the

Constraints as shown. Save your Part. Call it “Knob_Step1”

Exercise

The Knob (Step 2): Extruding Basic Surfaces

In this step you will create

the basic surfaces for the

Knob.

Do It Yourself

Extrude the two arcs by 70 mm and revolve the line by 90 Degrees. Save your part. Name it “Knob_Step2”.

Exercise

The Knob (Step 3): Performing operations

In this step you will perform the following operations on the Knob: Trim Split Extrapolate Variable Fillet Edge Fillet Symmetry Join 20 min.

Do It Yourself (1/4)

Trim the first Extrusion with the Revolution. Split the second Extrusion with the Trim.

Do It Yourself (2/4)

Extrapolate the Split “Up to Element” - specify the Trim. Use the “Assemble Result” option.

Extrapolate the Extrapolation “Up to Element” - specify the Trim. Use the “Assemble Result” option.

Do It Yourself (3/4)

Rotate the part around. Put in a fillet varying from 20 mm. on the left to 10 mm. on the right.

Do It Yourself (4/4)

Perform a Symmetry on the resulting EdgeFillet. Now, Join the two symmetrical parts.

Perform a Symmetry on the Join and once again, Join the two symmetrical parts.

Exercise

The Knob (Step 4): Analyzing and modifying draft

In this step you will perform Draft Analysis on the Knob. You will then modify underlying Wireframe geometry in order to increase the Draft Angle.

Notice how the change propagates to downstream surfaces and how the Analysis visualization is immediately updated.

Do It Yourself (1/2)

To see the result of the Draft Analysis, the current Render Style must be “Customized” with “Materials” active.

Select the final surface and activate the Draft Analysis Tool. Set the Color Code Bar as above.

Load: Knob_Step4.CATPart

We will apply a 4 Degree draft angle to this vertical wall.

Do It Yourself (2/2)

Close the Color Code Bar. Double-Click into the Line Sketch and change the angle to 86 Degrees.

Upon exiting from the Sketcher, the software propagates the change to the surfaces and the Draft Visualization is updated immediately.

Exercise

The Knob (Step 5): Offsetting a Solid

In this step you will see how surfaces are useful for creating complex solids. In this exercise you will specify an offset on the final surface to obtain a solid with a specific wall thickness.

Do It Yourself (1/2)

Change to the Part Design Workbench.

Select the final join and create a 4mm Thicksurface pointing inward. No-Show the open body to see only the solid.

Switch the render style to wireframe mode and look normal to the YZ plane. Notice that the offset of the 4 mm Degree drafted wall has resulted in a non-horizontal footprint for the knob.

Do It Yourself (2/2)

Perform a Split on the solid using the XY plane to take off the excess. Add a material – Rubber – and switch to the Customize Render Style.

Exercise

The Plastic Bottle

In this exercise you will see how to create a plastic bottle using the Generative Shape Design workbench functionnalities :

Creating wireframe elements (point, line, plane..) Creating surfaces (sweep,loft, extrude,revolve…) Manipulating surfaces (trim, symmetry, join…)

Design Intent: The Plastic Bottle

• Creation of wireframe geometry : points, lines, planes, helix

using the stacking commands

capabilities and working on support

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

• Operations on surfaces using Fillets, Trim, Join and healing

• Analysing the surfaces using the connect checker.

Design Process: The Plastic Bottle

Creating the body of the bottle 2 Creating the Bottom of the bottle 1 Creating the Bottleneck 3 Assembling the three open bodies

Exercise

The Plastic Bottle (Step 1): Creating the bottom of the bottle

In this step you will complete the

existing Wireframe and create the

bottle’s bottom surfaces.

Do It Yourself (1/4)

Insert a new Open Body, rename it as Bottle_Bottom.

Create an Intersection point between the Intersect.1 axis and the green profile Sketch.2.

Working on the ZX plane support, draw a circle by Center and point (creating the center point on the fly) with the following characteristics :

Center point on the pink axis and 5 mm below the Intersection point just created

Intersect.1

Do It Yourself (2/4)

Create a point on plane (-15mm ; -20mm) with the Intersect.4 as reference. Create a Symmetry of this point using the pink axis (Intersect.1) as

reference.

Using these two points, create two bi-tangent lines with the previous circle. Trim the two created lines with the circle.

Exit the Work on support mode.

Create two symmetric planes with a angle of 36 degrees with the YZ reference plane.

Do It Yourself (3/4)

Create an Explicit sweep using the Trim.2 as profile and the green Sketch.2 as Guide curve.

Do It Yourself (4/4)

Create a Variable edge fillet as shown.

Split the created EdgeFillet.1 with the two 36 degrees planes created before. Create 4 Rotate surfaces (72 degrees) to complete the bottom.

Join the created surfaces an rename the Join as Bottle_Bottom.

Exercise

The Plastic Bottle (Step 2): Creating the bottle body

In this step you will complete the

existing Wireframe and create the bottle’s

body surfaces.

Do It Yourself (1/3)

Insert a new Open Body, rename it as Bottle_Body.

Create two parallel curves of the Sketch.4 on the ZX plane at a distance of 3mm in both directions.

Create a parallel curve of the Circle.1 on the Plane.2 at a distance of 1.6mm inward. Create 2 Combined curves between the Circle.1 and the two curves Parallel.1 and Parallel.2

Create a Combined curve between the Sketch.4 and the Parallel.3

Sketch.4 Circle.1 Circle.1 Parallel.1 Parallel.2 Parallel.3 Load: bottle_step2_begin.CATPart

Do It Yourself (2/3)

Create a Implicit Circular Swept surface with three guides using the three created combined curves as guide curves.

Create 3 instances of this Sweep using a Translate along the Z axis and the Repeat object after OK option. For the distance between the instances,

Do It Yourself (3/3)

Create an Revolved surface using the Sketch.3 as profile and the the Intersect.1 as Revolution axis.

Trim the created revolved surface with the previous Join.

Create a 2 mm edge fillet on the edges resulting of the previous Trim. Rename the created fillet as Bottle_Body.

Sketch.3

Exercise

The Plastic Bottle (Step 3): Creating the bottleneck

In this step you will complete the

existing Wireframe and create the

bottleneck surfaces.

Do It Yourself (1/9)

Insert a new Open Body, rename it as Bottle_Body.

Create a Point between the Intersect.2 and Intersect.3 points with a ratio of 0.6

Create a plane parallel to the Plane.2 through the created Point.3

Do It Yourself (3/9)

Create an Revolved surface using the Sketch.3 as profile and the the Intersect.1 as Revolution axis.

Create a Boundary curve with the lower edge of the revolution surface. Create a point on the boundary at a quarter distance from the Extremum.2

Do It Yourself (4/9)

Create a 12 mm Extruded surface with the Circle.1 in the Z axis direction upward.

Create a Boundary curve with the lower edge of the revolution surface.

Plane.5

Do It Yourself (5/9)

Create two projected points of Extremum.2 on the Circle.3 and on the Boundary.2

Create a Loft between the three sections : Boundary.1 ; Circle.3 ; Boundary.2

Use the boundaries surfaces as tangents and the Extremum.2 and its projections as closing points

Do It Yourself (6/9)

Create a Line on the Loft. Starting from the extremum.2 with an angle of 45 deg with the upper boundary and with a length of 500 mm.

Do It Yourself (7/9)

Create a new boundary curve on the revolution surface relimited by the two previous lines.

Create a second boundary on the Extruded surface relimited by the two previous lines. Hide the Loft and create a Fill surface with four previous curves.

Do It Yourself (9/9)

Create a healing surface with the Fill.1 and all the rotated surfaces. Define a Merging distance of 0.5mm

Join this surface with the revolution and the Extruded surfaces. Rename the Join as Body_Style.

Exercise

The Plastic Bottle (Step 4): Assembling the three open-bodies

In this step you will complete

the existing Wireframe and assemble

the previous bodies with trim

operations and fillets.

Do It Yourself (1/5)

Insert a new Open Body, rename it as Bottle_Assembled.

Create a 2mm upward offset plane from the Plane.1.

Create a 2mm downward offset plane from the Plane.2.

Do It Yourself (3/5)

Create an Implicit linear swept surface with two guide curves : Intersect.6 and Intersect.7

Create an Implicit linear swept surface with two guide curves : Intersect.5 and Circle.1

Do It Yourself (4/5)

Do It Yourself (5/5)

Create an 5mm EdgeFillet on the two salient edges. Rename the fillet as Bottle_Assembled.

Exercise

The Plastic Bottle (Step 5): Creating the bottleneck screw

20 min.

In this step you will

complete the existing

Wireframe and

bottleneck screw

surfaces.

Do It Yourself (1/4)

Insert a new Open Body, rename it as Bottleneck_Screw.

Create on the fly a point and a plane with the characteristics shown below.

Do It Yourself (2/4)

Create a Helix starting from the last created Point.5 with Intersect.1 as axis and with the following parameters : Pitch = 3 mm / Height = 7mm /

Do It Yourself (3/4)

Create a point on the helix at a distance of 0.8mm from the starting Point.5 Create a Connect Curve to link the Helix with the Line.5

Exercise

The Space Mouse

In this exercise you will see how to create an Hybrid part using the Generative Shape Design and the Part Design

workbenches :

Creating Wireframe elements. Creating surfaces and solids. Assembling surfaces and solids.

Design Process: Space Mouse

Create the base pad and the upper fillet

1

Create the surfacic elements

2

Sew the surface on the pad

3

Create the groove.

4

Split the part with the imported surface

5

Shell the created solid.

6

Create the shaft

7 Create the holes and the pockets

8

Assemble a new body and create a circular

pattern.

Exercise

The Space Mouse (Step 1): Creating the base pad and the upper fillet

In this step you will create the

base sketch, the main pad of the

part, and you will fillet the upper face

of the pad.

Do It Yourself (1/2)

Draw the following sketch on the XoY plane.

Create a plane with an angle of 6.5 deg with the XoY plane.

Offset this plane upward of 15mm.

Do It Yourself (2/2)

Create a Up-to-Plane pad with the previous sketch and the upper plane.

Create a 3mm edge fillet on the upper edge of the previously created pad.

Exercise

The Space Mouse (Step 2): Creating the surfacic elements

In this step you will create two

profiles, a loft from these profiles, a fill

surface, and finally you will split the

surfaces with the pad.

Do It Yourself (1/3)

Create a 10mm offset from the XoZ plane.

Create a 110mm offset from the XoZ plane in the same direction.

On the first plane draw this sketch :

Do It Yourself (2/3)

Create a loft using the two created sketches :

Do It Yourself (2/3)

Create a fill surface between the line and the first sketch.

Join the filled surface with the previous loft. Split this join with the lower face of the pad.

Exercise

The Space Mouse (Step 3): Sewing the surface on the pad

Sew the just created surface on the

solid.

Do It Yourself

In the CATIA Part Design workbench, sew the previously created split surface with the solid.

Exercise

The Space Mouse (Step 4 to 7):

In these steps, you will create a

groove, split the part with an imported

surface, shell the solid and create a

shaft.

Do It Yourself : step 4

On the YZ plane, draw the following sketch :

Groove the created profile as shown :

Do It Yourself : step 5

Select the

imported_surface in the tree and put it in Show mode :

Split the solid with the blue surface :

Load : SMBase_step4.CATPart

Do It Yourself : step 6

Do It Yourself : step 7

Sketch this profile :

Create a shaft with this profile.

Create a 2mm edge fillet as shown :

Exercise

The Space Mouse (Step 8):Creating the holes and pockets

In these steps, you will create holes,

instantiate holes with a user pattern and

create pockets.

Do It Yourself (1/4)

Create a 28mm diameter hole on the shaft.

On the upper plane of the part, sketch the following profile :

Do It Yourself (2/4)

Create a Up_to-Next pocket with the sketch you have just created

Create a 11mm diameter hole as shown on right :

Do It Yourself (3/4)

Create the following sketch on the upper plane of the part :

Reuse this sketch to instantiate the previous hole on the part :

Do It Yourself (4/4)

Create a 0,5mm edge fillet an the upper edges of the created holes.

Sketch the following profile on the ZX plane.

Create a pocket from this sketch.

Exercise

The Space Mouse (Step 9):Assembling a new body to the part body and patterning it.

In these steps, you will create a new

body, a shaft and pad under this new body,

assemble this body with the part body, and

create a circular pattern of this assembled

body.

Do It Yourself (1/3)

Insert a new body.

Sketch the following profile on the YZ plane.

Create a 12,5 degree

symmetrical shaft from the previous profile.

Do It Yourself (2/3)

Create a 0,5mm edge fillet on the 5 edges as shown.

Sketch a 8mm diameter circle on the bottom face of the part.

Create a 3mm pad from this sketch.

Assemble the body with the part body.

Do It Yourself (3/3)

Exercise

The Shampoo Bottle

In this exercise you will:

• Create wireframe elements • Create Lofted Surface

• Create Extrude Surfaces • Create Fill Surfaces

• Create Fillets • Create Join • Create Split

Design Intent: The Shampoo Bottle

Design Process: The Shampoo Bottle

Creating Basic Shape Wireframe Geometry

1

Create a Symmetry and Join the surfaces

7

Creating the Handle of the Bottle

8

Creating Fillets

9

Thick the Surface

Exercise

The Lemon Squeezer

In this exercise you will create a Lemon Squeezer starting from an existing model. First you will complete the supporting Wireframe using :

• Evolution laws • Extremum points

• Wireframe relimitation

Next, you will create the surfaces using : • Swept and fill surfaces

• Blend surfaces with coupling points • Trim operator

Then you will add fillet on sharp edges and you will create filtering holes in the lemon squeezer using : • Circular patterns

• Projected curves

Design Intent: The Lemon Squeezer

Design Process: The Lemon Squeezer

Creating basic surfaces

Creating blend surface with coupling and adding the

handle Creating filtering holes 3 2 4 Completing the Wireframe 1

Exercise

The Lemon Squeezer (Step 1): Completing the Wireframe Elements

In this step you will:

•Create an evolution law

• Use it to create a driven parallel curve • Create an extremum point

•Re-limite the existing Wireframe elements 30 min.

Do It Yourself (1/5)

Using the Knowledge advisor create an evolution law in the PART 2 : Y=abs(2sin(10  X))

Rem. : ➨ Before creating the law the part has to be active as shown below.

Do It Yourself (2/5)

Create a parallel curve to Circle.1 on Plane.3 using the law mode : select Law.

Do It Yourself (3/5)

Create the symmetry of Parallel.1 using Project.2 as reference.

Do It Yourself (4/5)

Create the minimum point on Sketch.1 along the Z axis.

Do It Yourself (5/5)

Translate Project.2 :

Direction = Plane.3 Distance = 10mm.

Create a plane parallel to Plane.3 through point. On the previously created plane create a circle :

Radius = 2mm.

Translate the previous point of 1.2mm.

➨_{The wireframe is completed. It will support the}

surfaces creation in the next step.

Reference model : lemon_step1_end.CATPart

Exercise

The Lemon Squeezer (Step 2): Creating the basic surfaces

In this step you will:

•Create swept surfaces • Create fill surfaces •Join the result

Do It Yourself (1/3)

Create the following explicit sweep and create the lower boundary :

Do It Yourself (2/3)

Create the following explicit sweep and create the lower boundary :

Do It Yourself (3/3)

Fill the Circle.5 passing through the point called Translate. 3 :

Reference model : lemon_step2_end.CATPart

Exercise

The Lemon Squeezer (Step 3): Creating a blend surface with coupling points and adding the handle

In this step you will:

•Create coupling points

• Create blend surface using the coupling points •Add the handle to the result

Do It Yourself (1/5)

Create the upper boundary of the entity Join.3.

Create a plane passing through this boundary and its central point.

Using the previously created elements create a polar extremum on the boundary :

Keep only one sub-element using the Point.3 :

Load : lemon_step2_end.CATPart

Do It Yourself (2/5)

Create a point on the boundary curve using the extremum point previously created as reference.

Do It Yourself (3/5)

Put Circle.5 in the No-Show and create the boundary of the fill surface Fill.3.

Project all the previously created points on this boundary (you can project them in one operation).

Do It Yourself (4/5)

Create a blend to complete the part using the previously created points as coupling points :

Do It Yourself (5/5)

Show the handle and trim it with the previous Join.

Add a 1mm fillet on the inner edge.

Reference model : lemon_step3_end.CATPart

Exercise

The Lemon Squeezer (Step 4): Creating the filtering holes

In this step you will:

•Create a sketch

• Create a circular pattern •Project curves

•Trim a surface with curves 30 min.

Do It Yourself (1/4)

Create an offset plane from XY (10mm and –Z direction) and create this sketch in this plane :

Do It Yourself (2/4)

Create a circular pattern from the previous ellipse on the Plane.7 :

Do It Yourself (3/4)

Project in the Z direction the ellipse and the circular pattern on the main surface (keeping all the sub-elements) :

Do It Yourself (4/4)

Split the Lemon Squeezer with the previous projected curves :