Generative Shape Design V5R8 Update

8/11/2019 Generative Shape Design V5R8 Update

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Copyright DASSAULT SYSTEMES 2002 1

Generative Shape

Design V5R8 Update

CATIA TrainingFoils

Version 5 Release 8

January 2002

EDU-CAT-E-GSD-UF-V5R8


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Course Presentation

Objectives of the courseIn this course you will see the main enhancements in the Generative Shape Designworkbench

Targeted audienceCATIA V5R7 users

PrerequisitesV5R7 CATIA Generative Shape Design

2 hour


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Table of Contents

1. Introduction to Generative Shape Design p.4

User Interface: Generative Shape Design p.5

2. Creating Wireframe Elements p.6Creating a Cornered Polyline p.7

Other Enhancement about Wireframe p.11

3. Creating Surface Elements p.16

Creating an Offset Surface p.17

Creating a Swept Surface: Smooth Sweeping p.18

4. Performing Operations p.20

Federating Elements p.21

Applying an Axis-to-Axis Transformation p.27

Smoothing a Curve on a Support p.31

Fillet Creation Enhancements p.36

Other Enhancements about Operations p.40


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The Generative Shape Design user interface

You wil l become fam il iar with the Generat ive Shape Design Work bench .

Introduction to Generative Shape Design


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User Interface: Generative Shape Design

V5R8

V5R8



Creating a Polyline with Corners

Other Enhancements :Creating a Spline Curve

Creating a Connect Curve

In this lesson you learn how to create som e types of Wireframe Elements :

Creating Wireframe Elements



You w il l learn how to create a poly l ine includ ing c orners in

one operat ion.

Creating a Cornered Polyline

V5R8



Why create Cornered Polylines ?

You can use this tool to create rapidly a polyline including corners :

V5R8

Not using the point-point chain mode with corner tool :

Using the line point-point chain mode with corners tool :

Creating the lines point-point :

n-1 operationsInput data : 4 pointsCreating the corners :

n+1 operations

Triming the lines

with the corners :

n+5 operations

Input data : 4 pointsCreating the polyline:

1 operation

Whatever the number of point you want to

use, only one operation is necessary to create

the polyline.



Lets see now how to create a Cornered Polyline ...

How to create a Cornered Polyline

The federation of elements is available through the Join and the Extract tools :

V5R8



1

2 Select existing points.

Creating a Cornered Polyline

3 Specify a radius for the intermediatepoints.

4 Click OK to confirm the corneredpolyline creation.

You can now create a polyline including corners

V5R8



You w il l learn oth er enhancements in the Wireframe Creation

of the Generat ive Shape Design w orkb ench

Other Enhancement about WireframeV5R8



Creating a Spline Curve

You can now use a curve to specify a tangency condition at a point of the spline

Create the spline selecting

existing points.

1

2

Select the point on which you want to add

a tangency condition and expand the

Parameters panel.

3

In the constraint type field, choose the new option

From curve that allows you to choose a curve to

add the tangency constraint.

Now you can select a curve to specify the

tangency constraint :

V5R8

4

Note : the point of the

spline must lie on the

selected curve.



1

2Select the first curve to

connect and a point on

this curve.

Creating a Connect Curve

4 If needed click on the

red arrow located oneither point to

reverse the

orientation of the

associated curve, or

use the dialog boxs

new option.

Curve 1

3 Select the second curveto connect and a point on

this curve.

Point 1

Point 2

Curve 2

Curve

orientation

Creating a connect curve, you have now the possibility to invert the

orientation of the associated curve from the dialog box

V5R8



1

2 Select the two curves.

Intersecting Elements : Type of created Elements (1/2)

3 Choose the type of

element you want togenerate.

You can choose the type of elements that is created when you perform an

intersection operation :

V5R8

The type of element that was selected

is created (in our exemple, it is a curve

that is created).


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Intersecting Elements : Type of created Elements (1/2)

Four different type of element can be generated :V5R8

- Points : when

intersecting two curves

or a curve and a surface. - Curves : when intersecting

two curves or a curve and a

surface.

- Faces : when intersecting a surface

with another or a surface with a pad.

- Contours : when intersecting a

surface with another or a surface

with a pad.


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Creating an Offset SurfaceCreating a Sweep Surface

In this lesson you learn how to create som e types of Surface Elements :

Creating Surface Elements


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1

Creating an Offset Surface

2 Select the reference surface and key inthe offset value.

Click OK to confirm the offset creation.

If you want to create both side of the

offset surface, choose the Check both

side option.

3

4

You can now create both side of an offset surface with the same offset distance.

Reference surface

V5R8


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1

Creating a swept Surface : Smooth Sweeping (1/2)

2Select the elements to create the swept surface.

The guide curve contains a tangency discontinuity.

Create the swept surface without using

the smooth option and analyse its

continuity :3

When you create a swept surface using elements (curve or surface) with small

tangency discontinuities, you can now smooth the resulting surface while

creating it. Guide curve (thediscontinuities are

displayed)

Profile

The resulting surface

contains a 0.41deg

tangency discontinuity.


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Creating a swept Surface : Smooth Sweeping (2/2)

4 Edit the swept surface and activate the new optionSmooth Sweeping.

Go and check the analysis : the

maximum tangency discontinuity has

been lessened.

3

V5R8

Note : by default, the

discontinuities under 0.5deg

are taken in account.

This option aims to generate better quality surfaces.


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Federating ElementsTransforming Elements Axis-to-Axis

Smoothing Curve on Support

Creating Fillets

Other Enhancements

Splitting and Trimming: Intersection ComputationJoining Surfaces: Angle Tolerance

Healing Surfaces: Distance and Tangency Objective

In this lesson yo u learn how to p erform some Operations :

Performing Operations

F d ti El t


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You wil l learn how to federate elements whi le jo in ing surfaces

and extract ing faces

Federating ElementsV5R8

Wh f d t ? (1/2)


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Why federate ? (1/2)

1- Surfaces are made of several faces.

Elements created from a surface are in fact created from its faces.

2- A modification of the part geometry may lead to a change of the supporting face.

The pad has been created with the

option Up to surface, using the blue

surface.

A fillet have been added to the top

edge of this pad.

This edge depends on a face of the

blue surface.

The sketch supporting the pad have

been modified so that the filleted edge

does not lie anymore on the same face

V5R8


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How to Federate Elements


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Lets see now how to federate ...

How to Federate Elements

The federation of elements is available through the Join and the Extract tools :

V5R8

V5R8

Federating Elements while Joining Surfaces


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Click OK to create the federated

joined surface.

1

2 Select one by one the elements to be joined together.

Federating Elements while Joining Surfaces

3Expand the new Federation panel

in the join dialog box.

4 Select one face of the join surfaceand choose a propagation type.

5

Joining surfaces, you have now the possibility to federate the faces of the resulting

surface

V5R8

Federating Elements while Extracting Faces


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Click OK to create the federated

extracted surface.

1

2 Select one face of the solid.

Federating Elements while Extracting Faces

3 Choose a propagation type.

4 Activate the federation switch.

5

Extracting faces from a solid, you have now the possibility to federate the faces of the

resulting surface

V5R8

Applying an Axis-to-Axis transformation V5R8


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You w il l learn how to perform an Axis -to-Axis transformat ion.


What is an Axis-to-Axis transformation ?


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What is an Axis to Axis transformation ?

An Axis-to-Axis transformation transform geometry positioned according to an axis

system into another axis system :

V5R8

Reference Axis System

Target Axis System

Element to transform

Transformed Element

The green surface has been duplicated

and positioned according to the new

axis system.

How to apply an Axis-to-Axis transformation


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Lets see now how to apply an Axis-to-Axis transformation ...

How to apply an Axis to Axis transformationV5R8



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Click OK to create the transformed

surface.

1

2 Select the element to transform.

Applying an Axis to Axis transformation

3Select the reference Axis System.

4 Select the target Axis System.

5

V5R8

Smoothing a Curve on a SupportV5R8


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You w i l l learn how to smooth o n i ts supp ort .

g ppV5R8

Why smoothing curve on a support ? (1/2) V5R8


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y g pp ( )

1- Smoothing a curve that lies on a surface, you may obtain a curve that does not lie

anymore on the surface.

So you may not be able to use this smoothed curve properly :

Trying to make a linear swept surface with

reference surface using the smoothed curve

as guide curve

an error message occurs because

the guide curve does not lie on the

reference surface.

V5R8

Why smoothing curve on a support ? (2/2)


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y g pp ( )

2- Using the new option Support surface while smoothing the curve, you make sure

that the smoothed curve remains on the surface :

Selecting a support surface

the swept surface is correctly created

because the smoothed curve now lies on the

support surface.

V5R8

How to smooth Curve on a Support


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Lets see now how to smooth a

curve on a support ...

V5R8

Smoothing a Curve on a Support


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Click OK to create the smoothed

curve : it will lie on the surface.

1

2 Select the curve to smooth.

3 Define the smooth parameters.

4Select the support surface (the curve

to smooth must lie on this surface).

5

Smoothing a curve, you have now the possibility to select a support surface.

V5R8

Fillet Creation EnhancementV5R8


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You w il l learn the enhancements abou t the fi l lets creation.

V5R8

Creating Shape Fillets : Hold Curve and Spine


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Creating Shape Fillets, you can now choose a curve sketched on one of the support

to be connected to control the radius variation.

Select the supporting faces.

1

2

4

Select the shape fillet icon.

V5R8

Spine Curve

Hold Curve

Click OK to create the fillet surface :

Select a hold curve lying on one support to drive

the fillet radius, And a spine curve.

3

Note : the result is a variable radius

fillet whose radius is driven by the

hold curve.

Creating Shape Fillets : trim first or second support (1/2)


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You can now trim only the first or the second support of a shape fillet.

Select the two support surfaces.

1

2

Choose the support you want to trim.

By default, the two support will be trimmed.

V5R8

3

Type in the fillet radius and select

the fillet parameters.

4

Creating Shape Fillets : trim first or second support (2/2)


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Four combinations are possible :

No support are trimmed Both support are trimmed

The second support is left unchanged.

Only the first support is trimmed.The first support is left unchanged.

Only the second support is trimmed.

V5R8 V5R8

Other Enhancement about OperationsV5R8


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You wil l learn other enhancements in the Operat ions of the

Generat ive Shape Design wo rkbench

V5R8

Splitting and Trimming : Intersection Computation


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While splitting or trimming elements, you can now compute their intersection.

Select the elements you

want to trim or to split :12

You can now compute

the intersection while

performing the split or

trim operation.

3

V5R8

The elements intersection is

computed and the

intersection is added in the

tree.

Joining Surfaces : Angle Tolerance


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While joining surfaces, you can specify an angle tolerance.

If the angle value on the edge between two elements is greater than the Angle

Tolerance value, the elements are not joined

Select the elements to be

joined. The tangency

discontinuity between these

surfaces is 6deg :

1 2

V5R8

3

Click OK to

confirm the join

creation.

4

Activate the newoption Angle

Tolerance.

CATIA refuses to create the join

surface because the tangency

discontinuity between the

surfaces is greater than the

specified angle tolerance:

H li t f h th ibilit t ll i i

Healing Surfaces : distance and tangency objective


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Healing two surfaces, you have now the possibility to allow a remaining gap or a

remaining tangency discontinuity between the surfaces.

Select the

surfaces to heal :12

If you should decide to allow a remaining gap between

the surfaces, key in the maximum tolerated value of

this gap.

Then CATIA inform you about the value of the

remaining gap :

3

4

0.2 mm gap

Key in a merging distance superior to the gap value.

V5R8

The same option is available

concerning the tangency continuity

type healings.

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Generative Shape Design V5R8 Update

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