EDU_CAT_E_GSD_FF_V5R8

Copyright DASSAULT SYSTEMES 2002 1

Generative Shape Design

CATIA Training Foils

Version 5 Release 8January 2002

EDU-CAT-E-GSD-FF-V5R8


Course Presentation

Objectives of the courseThis course covers tools for surface design included in the Generative Shape Design Workbench that are not present in the Wireframe and Surface Design Workbench. At the end of the course, the student will be able to model complex fillets and analyze surface quality.

Targeted audienceMechanical Designers

PrerequisitesWireframe and Surface Design

1 day


Table of Contents

Introduction to Generative Shape Design p.6 Creating Wireframe Geometry p.12

Creating an Extremum p.13Creating a Polar Extremum p.21Creating a Reflect Line Methodology p.29Creating a Spine p.39Creating a Parallel Curve onto a Support within GSD p.Extracting Multiple Edges from a Sketch p.Tools for Wireframe Geometry Creation p.

Creating Surfaces p.67Creating Swept Surfaces p.68Creating an Adaptative Swept Surface p.72


Table of Contents

1. Performing Operations p.67Joining Elements p.Healing Elements p.Smoothing Curves p.Extracting Elements p.Federating Elements p.Creating Fillets p.Inverting Orientation p.Creating Laws p.

Using Analysis Tools p.Managing Features and Open Bodies p.Hybrid Design (Working with Hybrid Parts) p.


Generative Shape Design WorkbenchGenerative Shape Design InterfaceGenerative Shape Design Terminology

1 hour

In this lesson you will see V5 Generative Shape Design user interface and basic functions

Introduction to Generative Shape Design


From the MENUBAR

Start/Shape/Generative Shape Design

Accessing the Workbench

1

2By clicking on the current Workbench icon (top right) to access the Favourite Workbenches window.


ShapeDesign tools...

Sketcher access...

Part Tree

Standard tools

All Non-Solids(i.e. Points, Curves, Surfaces) grouped under “Open Body”

User Interface: Generative Shape Design General Presentation


User Interface: Generative Shape Design (1/2)


User Interface: Generative Shape Design (2/2)


The PartBody is the default Body for a Part where Solids are storedThe Open Body is where non-solids (points, curves, surfaces) are

stored

TerminologyA Part is a combination of one or more Bodies and Open Bodies

Wireframe features

Surface features

Group :Set of surfacic features


From Assembly > create a new part

(Top-down approach)or

Create a new part> insert in assembly

(Bottom-up approach)

General Process

Go into the Sketcher to create the planar

Wireframe Geometry

Create Surfaces on the Wireframe Use GSD to create all

required 3D Wireframe Geometry

Optional : Join Multiple Surfaces then Offset a solid

43

2

1

5

Use GSD to create Planes in 3D to support 2D Wireframe

geometry


Creating Wireframe GeometryIn this lesson, you will learn how to create all types of Wireframe elements.


WFS Wireframe versus GSD WireframeWireframe & Surface Design and Generative Shape Design are two workbenches which have many common functionalities.Within GSD you will discover new functionalities that are not in WFS and also advanced capabilities in some functions that exist in both workbenches.

Functionalities specific to the Generative Shape Design workbench.

WFS

GSD

Functionality common to both workbenches but with more capabilities within GSD.


Review of WFS Wireframe Geometry

You can review the tools covered in the Wireframe & Surface Design Course which are also included in the Generative Shape Design Workbench.

Creating Points in 3D

Creating Lines in 3D

Creating Planes in 3D

Creating Curves in 3D


In this Skillet you learn what is an Extremum and how to create it.

Creating an Extremum


Why Create an Extremum?In order to help CATIA find the maximum or minimum point of a curve or surface along any direction chosen by the user.

Maximum Extremum on a Curve along the Z Axis

Minimum Extremum on a Surface along the X Axis

The element might be a sketch, a 3D curve or line, a surface or a solid face.

Maximum Extremum on a solid face along the Z Axis


1

2

Select the Extremum Icon.

Creating an Extremum

5

Select the element on which to find the Extremum.

3 Click OK to confirm. The Extremum is added to the specification tree

Select a line or a plane (normal direction) to specify the direction to evaluate the Extremum

Select Max or Min according to your requirement.

4


Additional Information on Extremum

If the element is a surface, you may specify two others optional directions.

If the Element is a surface, according to the chosen direction you can obtain a curve or a line as Extremum.


In this Skillet you learn what is a Polar Extremum and how to create it.

Creating a Polar Extremum


What is a Polar Extremum?Any planar curve can be defined with its polar equation (relation linking the radius and the angle).The polar extremum function allows you to find the points on the curve corresponding to :

The minimum radius from a specified origin :

The maximum radius from a specified origin :

The minimum angle regarding to a specified direction :

The maximum angle regarding to a specified direction :

The polar extremum is calculated in an axis system defined by :

- An origin.

- A reference direction.


Creating a Polar Extremum

1 Select the Polar Extremum Icon.

2 Select the type of polar extremum you want to create.

3 Select the planar contour on which you want to create the polar extremum and its supporting plane.

4 Select the origin point from the polar extremum will be calculated.

5 Define the reference axis.

6 Click OK to confirm the polar extremum creation.


Creating a Reflect Line Methodology

You will learn what is a Reflect Line and how create it.


What is a Reflect LineReflect lines are curves for which the normal to the support surface in each point presents the same angle with a specified direction. It is very useful to find the parting plane of a complex surface.

If we perform a Draft analysis on this part, we can see, thanks to the red areas that the part is non extractible.

Thanks to the Reflect Line curve, we can cut the part in two extractible parts.


1

2 Select a support surface and a direction.

Creating a Reflect Line

4 Click OK to confirm reflect line creation

Key in an angle representing the value between the selected direction and the normal to the surface.

Support

3

Reflect lines

You can define one of the X,Y or Z axis by opening a contextual menu in the Direction field.

Direction


Creating a Spine

You will learn what is a Spine and how create it.


What is a Spine ?

Profile

Guide Curve

In this Swept surface, the Spine is, by default, the guide curve. Each section of the swept surface is perpendicular to this Guide Curve

Swept sections are perpendicular to the guide curve

The swept sections may be oriented by another Spine (not the default one). For instance you want to get the swept sections perpendicular to the green spine:

Spine Swept sections are perpendicular to the Spine.

For the Swept and Lofted surface, there is a default spine (the guide or a computation from the guides). If you want to fix an orientation for your surface sections you will have to define a Spine.

The Spine icon will allow you to create a curve that will be use later as a spineThere are two ways to build a spine :

Curve normal to a list of ordered planes or planar curves

Spine curve computed from several guide curves


1

2

Select the Spine Icon.

Creating a Spine from planes and planar curves

Successively select planes or planar profiles.

3 Click OK to confirm. The Spine is added to the specification tree.

You can also select a start point.The point is projected onto the first plane as the spine starting point.

Use these three buttons to replace, delete or add a plane or a profile.


1

2

Select the Spine Icon.

Creating a Spine from Guide Curves

Click in the field Guide3

Click OK to confirm. The Spine is added to the specification tree.

Use these three buttons to replace, delete or add a plane or a profile.

Select the Guide Curves

4

Sweep using the default spine (guide curve 1)

Sweep using the user created spine


Creating a Parallel Curve onto a Support Within GSD

You will learn how create various parallel curves.


1

Creating a Curve Parallel to another on a Support (1/3)

2 Choose the parallelism type :

Geodesic :

The distance between the curves will be calculated taking the support curvature into account.

Reference curve

Euclidean Parallel Curve

Geodesic parallel curve

Support

Euclidean :

The distance between both curves will be calculated without taking in account the support curvature.

Reference curve

Parallel Curve

Geodesic

Euclidean


3


Select the reference curve and the support plane or surface.

Click OK to continue

The created curve is defined as an Object, i.e. the reference for creating the other curves

Specify the Offset by entering a value or using the graphic manipulator (green arrows).

4

Reference curve

Support

If you want to create several parallel curves separated by the same offset check the option Repeat object after OK

If you have chosen the euclidean parallel type, you can choose to offset the curve at a constant distance or according to a law.

56

Check here to create two parallel curves symmetrically in relation to the reference curve.

Select the parallel corner type.


7 Define the number of parallel curves to be created

8 Click OK to confirm parallel curve creation

• As many parallel curves as indicated in the Object Repetition dialog box are created, including the object parallel curve.• The parallel curves are separated from the object line by a multiple of the offset value.• The curve instances are grouped in a new Open Body if you have checked the option.


Object parallel curve

Parallel curve instances in a new Open Body

You can choose to create or not the instances in a new Open Body.


Extracting Multiple Edges from a Sketch.

You will learn to extract some geometrical elements from a Sketch.


1

Extracting Multiple Edges

2

Select the Extract Multiple Edges icon

If you have a sketch containing several elements, you can extract a subpart of these elements to create geometry.

Select the geometry of the multi profile sketch that you want to extract

3 Click on OK, the extract is added to the specification tree

Click on this button to delete a sub element of the list


Tools for Wireframe geometry creation.

Stacking Commands Work on Support

Now let us look at some Wireframe tools common to the WFS and GSD Workbenches ...


You will learn how to stack commands while creating wireframe elements.

Stacking Commands


What about stacking commands ?You can create the following construction elements:- points, - planes, - intersections.- lines, - projections,You have access to the stacking commands capability while creating:- points, - circles, - translations, - lines, - conics - rotations, - planes, - corners, - symmetry.

Why Do You Need to Stack Commands ?

Stacking commands allows you to create construction elements while creating an element which requires those construction elements.

Using mouse button 3 you display a contextual menu listing all the elements you can create using the stacking commands capability.


You define the parameters of the construction element.

Let ’s see now the way to stack commands...

Stacking Commands…

While creating an element you may need a construction element that you will create on the fly.

The construction element is created and selected at the same time.

When using the stacking command capability you can check the status of the stack in the Running Commands window.


1

2

Stacking Commands (1/4)

Select the type of plane you want to create.

When you create some wireframe elements (point, line, plane, circle, corner, conic) or when you perform a translation, a rotation or a symmetry on an object you can create on the fly the

missing construction elements, i.e. points, lines, planes, intersections or projections.

In the following example you will see how to create a plane from scratch.

3 Using mouse button 3 click in the Point field and select the Create Point option.The Point Definition window is displayed.



4 Define the parameters to create the point.The status of the stacking commands is also displayed in the Running Commands window.

5 Click OK to accept point creation.The Plane Definition window is displayed again with Point.1 in the Point field.

The Point button next to the Point field allows you to edit the point parameters.

6 Using mouse button 3 click in the Line field and select the Create Line option.The Line Definition window is displayed.



7 Define the parameters to create the line.The status of the stacking commands is also displayed in the Running Commands window.

8 To create the points needed for the line you can also use the stacking commands.In that case the Running Commands window will look like this:



9 Once the two points are created click OK to accept the line creation.The Plane Definition window is displayed again with Line.1 in the Line field.

The Line button next to the Line field allows you to edit the Line parameters.

10 Click OK to accept the plane creation.

If you want to modify a parameter of the plane you can also double-click on its identifier in the specification tree.

Point.1

Point.2

Point.3

Line.1

Plane.1


You will learn how to define a planar or non-planar support, work on it with or without a grid and snap to a point.

Working on a Support


What about support ?• If you define a plane as a support a grid is displayed and positioned in the plane of the screen. In that case you have access to the ‘Snap to Point’ capability.• If you define a surface as a support the elements created after selection of the surface will be located on the surface by default.

Why Do You Need to Work on a Support ?

You can select a plane or a surface to use it as a support for further element creation.

Support plane = YZWith the ‘Snap to Point’ capability the created points are located at the nearest intersection of the grid.

Support surface = Extrude.1When you create a point after selecting the surface as a support the Point Definition window automatically displays the option ‘On surface’.


Working on a Support – Plane Support (1/3)

1

2 Select the plane you want to define as a support, here the YZ plane.

The Work on Support window is displayed. A Working support.1 feature is added to the specification tree under the Working supports entry.

By default the last created working support (current) is displayed in red in the specification tree. The ‘not current’ working supports are displayed in blue.


Working on a Support – Plane Support (2/3)The Work on Support window changes and displays several options to define the grid.

Define the number of steps in a grid subdivision

Selected plane

Define the total length of the grid subdivision

Check this option if you want a different primary spacing in the second direction

Define which axis is taken as H direction in the 2D plane

3 Click OK to confirm grid creation.

Set the grid visualization parallel to the screen

If you enter coordinates when the ‘Snap to point’ icon is active, the system does not take the grid into account.

4 If you want your cursor to move directly to an intersection point of the grid click on the Snap to Point icon.


Working on a Support – Plane Support (3/3)

Here you are creating a point. Note that :- the point type is automatically set to ‘On plane’,- the cursor points only on the grid intersection points.

Create an element on the support.5

Exit the working support :6

Using the Working Supports Activity icon

Using the Set as Not Current option in the contextual menu


Working on a Support – Surface Support (1/2)

1

2 Select the surface you want to define as a support, here the extruded surface.

The Work on Support window is displayed. A Working support.1 feature is added to the specification tree under the Working supports entry.

By default the last created working support (current) is displayed in red in the specification tree. The ‘not current’ working supports are displayed in blue.


Working on a Support – Surface Support (2/2)

3 Click OK to confirm grid creation.

Here you are creating a point. Note that the point type is automatically set to ‘On surface’.

Create an element on the support.4

Exit the working support :5

Using the Working Supports Activity icon

Using the Set as Not Current option in the contextual menu


Creating Surfaces

In this lesson, you will review all the Surface creation tools that were covered in WFS and that are also available in the GSD Workbench


What about surfaces ? You can create a surface from:- a line, curve or sketch- other surfaces

You can use basic surfaces either to create a new part or to complete the design of a solid part

Surface of revolution created from a profile (Spline) and an axis of revolution

Offset surface created from another surface and a direction

For each type of surface you will also define its limits or the angle of revolution

Why Do You Need Surfaces ?


WFS Surfaces versus GSD SurfacesWireframe & Surface Design and Generative Shape Design are two workbenches which have many common functionalities.Within GSD you will discover new functionalities that are not in WFS and also advanced capabilities in some functions that exist in both workbenches.

Functionality specific to the Generative Shape Design workbench.

Functionality common to both workbenches but with more capabilities within GSD.

WFS GSD


Review of WFS SurfacesYou can review the tools covered in the Wireframe & Surface Design Course which are also included in the Generative Shape Design Workbench.

Creating a Surface from a profile- Creating a Extruded Surface- Creating a Surface of Revolution- Creating a Sphere

Creating a Surface from Boundaries- Creating a Fill Surface- Creating a Blend Surface

Creating a Surface from another Surface- Creating an Offset Surface

Creating a Lofted Surface


Explicit Swept Surfaces

Implicit Swept Surfaces

You will learn how to create Explicit and Implicit Swept Surfaces within the Generative Shape Design Workbench

Creating Swept Surfaces


You will learn how to create swept surfaces using Any Profile

Creating Explicit Type Swept Surfaces


1

2

3 Confirm swept surface creation

Creating an Explicit-type Swept Surface (1/7)

Select the guide curve and the profile. You can then choose to give a reference plane or surface (Reference tab) or to select another guide curve and anchor points (Second Guide tab).

If no spine is selected the guide curve is used as spine.

Select the Sweep Surface icon.

By default, the swept profile is constant in each section along the guide curve.



You can define a reference surface to control the position of the profile along the sweep.

Using a reference surface :

You can define a law to drive the angle evolution between the profile and the reference surface


Using positioning and a reference surface :Using positioning and a reference surface :

The guide curve axis system is now oriented regarding the reference surface orientation :

Using positioning :Using positioning :

The profile is oriented in the guide curve axis system.

Using no positioning :Using no positioning :

When the profile position is fixed with respect to the guide curve, the sweep lies on the profile and on the guide curve (if it intersects the profile) or on the parallel to the guide curve crossing the profile (minimum distance).


You can position the profile with the guide curve.Using the Position profile mode, the reference is no more the profile but the Guide Curve.

Green axis-system : current profile orientation

Grey axis-system : profile reference axis

Position Profile



In the Position profile mode you can display parameters to modify the position of the sweep profile on the guide curve defining a new origin and a rotation angle or direction.

These coordinates (or the selected point) define the position of the origin of the positioning axis system (green) in the first sweep plane.

The direction defines the X axis of the positioning axis system.

Position Profile : Parameters

Or

45 deg

You can rotate the positioning axis system around the guide curve with respect to initial axis system of the profile.



In the Position profile mode you can display parameters to modify the position of the sweep profile on the guide curve defining a new origin and a rotation angle or direction.

You may want to invert the orientation of the X or Y axes of the positioning axis system.

You can select a point defining the origin of the axis system linked to the profile.

Position Profile : Parameters



You can select a second guide curve to define the sweep.Second Guide Curve and Anchor Points

• If you check the Profile extremities inverted option, the profile extremities connected to the guides are inverted.

• If you check the Vertical orientation inverted option, the vertical orientation of the profile is inverted.

If no spine is selected, the first guide curve is the spine :

You can create a spine if you want to obtain a more regular surface :


Creating an Explicit-type Swept Surface (7/7)Second Guide Curve and Anchor Points

You also can use Anchor Points to position the profile on the guide curves.

Anchor points

Profile

Guide curves

While creating the swept surface, the anchor points are remaining on the guide curves all the sweep long.

So, the profile is positioned regarding to the initial geometrical conditions between the profile and the anchor points.


You will learn how to create swept surfaces using Linear Profiles

Creating Line Type Swept Surfaces


1

2

Creating a Line-type Swept Surface : Two Limits

Line type :

3 Confirm surface creation

Click on the Line icon, then select the Two limits subtype and the two guide curves.

If no spine is selected the first guide curve is used as spine.

Subtype : Two limits

Length 1

Length 2

Guide curve 1

Guide curve 2

You can select the second guide curve as middle curve instead of entering length values (same as Limit and middle subtype)


1

2

Creating a Line-type Swept Surface : Reference Surface

Line type :


Click on the Line icon, then select the With reference surface subtype, the guide curve and the reference surface. Key in an angle value and define the length of the surface.


Subtype : With reference surface

Angle between the sweep and the reference surface.

Length 2Length 1

Guide curve 1

Reference surface

Angle


1

2

Creating a Line-type Swept Surface : Tangency Surface

Line type :


Click on the Line icon, then select the With tangent surface subtype, the guide curve and the tangency surface.


Subtype : With tangency surface

Tangency

surface

Guide curve 1


You will learn how to create swept surfaces using Circular Profiles

Creating Circle Type Swept Surfaces


1

2

Creating a Circle-type Swept Surface : Two Guides and Radius

Circle type :


Click on the Circle icon, then select the Two guides and radius subtype, the two guide curves and the radius.


Subtype : Two guides and radius

Radius

In case of several solutions you can check them all and then select one of them (green color = active solution)


1

2

Creating a Circle-type Swept Surface : Center and Radius

Circle type :


Click on the Circle icon, then select the Center and radius subtype, a center curve and a radius.

If no spine is selected the center curve is used as spine.

Subtype : Center and radius


Click on the Circle icon, then select the one guide and tangency surface as subtype. Select the guide curve, the tangency surface, and key in a radius sufficient to link the guide curve and the tangency surface.

Creating a Circle-type Swept Surface : One Guide and Tangency Surface

Circle type : Subtype : One Guide and Tangency Surface1

2

In case of several solutions you can check them all and then select one of them (orange color = active solution)


You will learn how to create swept surfaces using Conical Profiles

Creating Conical Type Swept Surfaces


1

2

Creating a Conical-type Swept Surface : Two Guide Curves

Conical type :


Click on the Conic icon, then select Two guide curves and their tangency supports.

Define an angle between the swept surface and the tangency surface

Subtype : Two Guide curves

Set the parameter value (ranges from 0 to 1) indicating the sweep proximity to the spine.


1

2

Creating a Conical-type Swept Surface : Five Guide Curves

Conical type :


Click on the Conic icon, then select Four guide curves and a tangency support.

You can specify a Spine curve. The default spine is always the first guide curve.

Subtype : Five Guide curves

Five Guide Curves


You will learn what is an Adaptative Swept Surface and how create it

Creating an Adaptative Swept Surface


What is an Adaptative Swept Surface.

You can modify the constraints defined in the original sketch independently for each section.

Sketch By giving some points, you will define automatically intermediate sections on the spine.

This particular sweep uses a Sketch as Implicit profile along a Guiding Curve. The guiding curve is used as the default spine.

Guiding Curve

The Sketch has been designed in context directly from the dialog box and represent a connex profile


What are the differences with the Classic Sweep.

In an adaptative sweep, the surface inherits of the sketch constraints.

In the Explicit sweep the surface does not inherit of the constraints defined in the sketch.

The Implicit sweep is always defined from a sketch. This leads to build a surface that inherits of the sketch constraints scheme on the whole surface. Besides you can create on the fly intermediate sections along the guiding curve and modify the constraints independently in each section.

If we analyse the connections between the surfaces, there is a few acceptable tangency discontinuity areas.

If we analyse the connections between the surfaces, there are important tangency discontinuities.

What does that mean ?


1

Creating an Adaptative Swept Surface (1/3)

2

Select the Adaptative Sweep icon.

Select the Guide Curve and the Sketch to be swept.

3Select predefined points or vertices on the guide curve to add intermediate sections.

Sketch

Guiding Curve

Intermediate sections


4


Under the Parameters tab, you can modify the constraints defined in the original sketch for each section independently

75 mm radius

22 mm radius

Use this icon to remove a section


5


Under the Moving Frame tab, you can replace the spine (the default one is the guiding curve).

Click OK to confirm the surface creation6

The Discretization scroll bar allows you to define the precision of the surface. The step value define the number of virtual intermediate sections used to create the surface.

Result with a discretization step = 1.00

Result with a discretization step = 0.50


Additional Information on Adaptative Sweep (1/2)

If you want to create an adaptative swept surface which lays on other surfaces, you will create your sketch in context because you want to put some associative constraints with the existing geometry.

Here we want that the sketch keeps its tangency with the surfaces (the intersection between the surface and the sketch plane) in each section of the sweep.

In many cases, you will meet some difficulties to build associative elements from existing geometry.

To avoid this problem, it is better to build its sketch directly from the Adaptative sweep dialog box.

Open a contextual menu in the Sketch field then choose Edit Sketch.


Additional Information on Adaptative Sweep (2/2)

The Sketch Creation for Adaptative Sweep dialog box is displayed.

You just have to follow the instructions of the prompt bar.

Click on OK, the sketch is automatically defined with the construction elements.

Associative construction elements


In this lesson, you will review WFS tools to transform, to split, and to trim 3D geometrical elements. You will also see additional, powerful tools in GSD for Filleting, Extrapolating, Healing, and inverting the orientation of Surfaces.

Review of WFS Operations

Joining Surfaces

Healing Surfaces

Smoothing Curves

Extracting Elements

Federating Elements

Creating Fillets

Inverting Orientation

Creating Laws

Performing Operations on the Geometry


WFS Operations versus GSD OperationsWireframe & Surface Design and Generative Shape Design are two workbenches which have many common functionalities.Within GSD you will discover new functionalities that are not in WFS and also advanced capabilities in some functions that exist in both workbenches.


WFS

GSD


Review of WFS OperationsYou can review the tools covered in the Wireframe & Surface Design Course which are also included in the Generative Shape Design Workbench.

Restoring Surfaces

Disassembling Surfaces

Splitting Elements

Trimming Elements

Transforming Elements- Translating an Element- Rotating an Element- Applying a Symmetry to an Element- Scaling an Element- Creating an Affinity- Performing an Axis-to-Axis transformation

Extrapolating Elements

Creating Near Elements

Creating Patterns


You will learn how to join wireframe or surface elements

Joining Elements

Element 1

Element 2

Join result


What about joined elements ? You can create joined elements from:- adjacent curves- adjacent surfaces

You can join elements to use two or more elements as a single element in a further operation.

Why Joining Elements ?

Four adjacent surfaces.

Join result

Join result

Two adjacent splines.


Let ’s see now the way to join elements ...

How to Join Elements…


1

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

Joining Elements (1/2)

3 Click OK to confirm join operation.

To modify the join definition you can edit it and remove elements or replace an element by another.

This option checks the connexity between the elements in the resulting join.

CATIA will:- reduce the number of resulting elements- ignore the elements that do not allow the join to be created.

You can define a merging distance, i.e. the maximum distance below which two elements are considered as only one element.

Element 1

Element 2


Joining Elements (2/2)

While joining elements you can exclude some sub-element from the joined surface.

Face to be removed

You can also select sub-elements to exclude from the joined surfaces.

You can create another join surface with the excluded sub-elements.


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

Additional Information on Joining

Select the elements to be joined. The tangency discontinuity between these surfaces is 6deg :

Activate the new option Angle Tolerance.

CATIA refuses to create the join surface because the tangency discontinuity between the surfaces is greater than the specified angle tolerance:


Healing Surfaces

You will learn about the Healing operation


Why Healing?

While Join is a topological integration of surfaces into one logical surface, HEALING will mathematically deform the shape of surfaces at boundary areas so they smoothly blend into one another.

When physical parts are manufactured from CAD models, the machining is guided by the exact representation of the individual surfaces. Hence, Healing is important to ensure that each one of these surfaces transitions smoothly between one another.


1

2

Healing Surfaces (1/3)

3Choose if you want to heal the point discontinuities or the tangency discontinuities.

Select the Join where you know there is a gap that you would like to Heal. You can also select directly the surfaces to heal.


Healing Surfaces (2/3) : ParametersThe objective of the parameters is to choose the discontinuities you want to heal or not :

4 Key in parameters :

Note : a quick violation analysis can help to choose these parameters :

Healed Not healed

Merging distance

Healed Not healed

Tangency angle

Not healed Healed

Distance Objective

Not healed Healed

Tangency Objective

Gap value

Tangency discontinuity value

These parameters are thresholds that allows you to:- define the discontinuities to be healed (Merging distance and Tangency angle).- define the discontinuities you consider it is not necessary to heal (Distance Objective and Tangency Objective).


Healing Surfaces (3/3)

5 Click OK to confirm the healed surface creation.

Note : a quick violation analysis now shows :


Smoothing Curves

In this Skillet you will learn how smoothing curves.


We want to create a Line-type sweep from this curve using the plane as reference surface.

Why Smoothing CurvesSometimes when you want create a sweep for instance, CATIA answers you that the profile curve is not continue in tangency and that it could not build the geometry as you whish. The Smoothing Curve function allows you to clean these curves in distance and tangency.

We need to smooth the curve before generating the sweep.

We can see the discontinuity points and their values to correct the curve.

Using the smoothed curve, we can create the swept surface.


1

2 Select the curve to be smoothed.

Smoothing Curves (1/2)

3 Using the displayed values, set the tangency and curvature thresholds up to the value you want to repair.

Select the Smoothing Curve icon.

A discontinuity analysis is displayed :

- In area : discontinuity type and value before smoothing.

- Out area : discontinuity status after smoothing.

4 Click on OK to create the smoothed curve


Smoothing Curves (2/2)

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.

4 Select the support surface (the curve to smooth must lie on this surface).

5

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


Additional Information on Smooth Curve(1/2)

Meaning of the boxes colour:

The status of the discontinuities is displayed using a colour code.

A red boxred box means that the discontinuity has not been corrected.

Reason : the discontinuity is not within the specified threshold.

A yellow boxyellow box means that the discontinuity has been partially corrected.

Reason : the discontinuity in tangency is within the tangency threshold, but the curvature discontinuity is not within the curvature threshold.

A green boxgreen box means that the discontinuity has been completely corrected.

Reason : both tangency and curvature discontinuity are within the curvature and tangency threshold.


Additional Information on Smooth Curve (2/2)You can choose to visualize only the non-corrected discontinuities :

You can choose to visualize the discontinuities interactively, placing the mouse on the discontinuity to make the text box appear :

You can also display the information sequentially :

The total number of discontinuities is displayed.


You will learn how to extract edges and faces from a surface.

Extracting Elements

Edge extraction

Face extraction


1

2

3

Select a surface edge and choose the propagation type.

Click OK to confirm edge extraction.

Extracting an Edge from a Surface

Selected edge

According to the selected propagation type you get :

1- No propagation 3- Point continuity2- Tangent continuity

Here there is an ambiguity about the propagation side you are prompted to select a support face. In this case, the dialog box dynamically updates and the Support field is added.

You can extract one or several edges of a surface which can be either boundaries or limiting edges of faces. You cannot define limit points.

Selected support face


1

2

3

Select a face and choose the propagation type.

Click OK to confirm face extraction.

Extracting a Face from a SurfaceYou can extract one or several faces of a surface with or without propagation.

The complementary mode :

Switching on this button, you can de-select the elements to extract, and select the non-selected elements :


You will learn how to federate elements while joining surfaces and extracting faces

Federating Elements


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


Why federate ? (2/2)

3- This change can lead to an update error because the elements created from these faces are no longer recognized.

4- Federating the faces of the surfaces, this kind of update error does not occur anymore.

During the update of the part, an update error occurred : the filleted edge is not recognized :

To solve the problem, you just have to federate the faces of the blue surface.Then the part is updated without any problem :


Let’s see now how to federate ...

How to Federate ElementsThe federation of elements is available through the Join and the Extract tools :


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

3 Expand the new “Federation” panel in the join dialog box.

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

5

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


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 the possibility to federate the faces of the resulting surface


Creating Fillets

Filleting is an operation that is used to smoothly connect surfaces.

You will learn how to create Shape, Edge, Variable, Face-To-Face, and Tri-Tangent Fillets


Why Fillets?

Fillets were originally used in industry to remove sharp edges on parts.

More and more, people having been using Fillets as a general modelling tool for surface creation.


1

2

Select the Shape Fillet Icon

Creating a Shape Fillet (1/3)

5

Choose one of the Extremities conditions (Switch between the four types - and Apply - to see the difference)

3

Click OK to confirm. The Shape Fillet is added to the specification tree

Select two surfaces and put in the required radius value. Make sure the red arrows point towards the concave side of the fillet.

4

Decide which supporting surface you want to trim.

Use these command to create a fillet between two surfaces


Creating a Shape Fillet (2/3) : Extremity Type

Here are the different types of extremities


Creating a Shape Fillet (3/3) : Trimming the supportsFour 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.


1

2

Select the Edge Fillet Icon

Creating an Edge Fillet (1/2)

Select one or more internal edges of a surface

Use these command to provide a transitional surface along a sharp internal edge of a surface

You can control the Extremities of the Fillet the same way as for the Shape Fillet

3 Enter the Radius value.

You can also fillet an entire face


Creating an Edge Fillet (2/2)

Choose a Propagation type :4

Click OK to confirm. The Edge Fillet is added to the specification tree5

If Minimal, only the selected edges will be filleted.

If Tangency, all edges tangent to the selected edges will also be filleted.


1

2

Select the Variable Fillet Icon

Creating a Variable Fillet (1/3)

3

Select one or more internal edges of a surface

4

You can specify a Zero radius value at limit points of a Variable Fillet

Double-Click on any of the shown radius values to change it

Select inside this box then select anywhere along the edge to put in an additional radius value along the edge. (You can also create a point on the edge and select this point if accuracy is required)

In this type of fillet the radius varies at selected points along a selected edge

You can control the Extremities of the Fillet the same way as for the Shape Fillet and the Propagation type the same way as for the Edge Fillet



Choose a radius variation type : Cubic (function ax3+bx2+cx+d)

Click OK to confirm. The Variable Fillet is added to the specification tree6

5

Linear (function ax+b)



Edge to be filleted

You have the capability to create a variable fillet with the fillet sections keeping a constant direction in accordance with a spine

The fillet sections are perpendicular to filleted edge

The fillet sections are perpendicular to the Spine

Spine


12

Select the Face-To-Face Fillet Icon

Creating a Face-To-Face Fillet

3

Click OK to confirm. The Face-To-Face Fillet is added to the specification tree

Select the two faces (belonging to the same surface) between which you want to create the Face-To-Face Fillet

The shape of the Face-To-Face Fillet is basically generated by lying a Cylinder with a specific radius into the gap between two faces. If the radius is too small, the Cylinder will not be able to touch both faces at once. If the radius is two big, we will not be able to achieve a Cylinder tangent to the faces.

Put in the desired radius

4

Use the Face-Face fillet command when there is no intersection between the faces or when there are more than two sharp edges between the faces.

You can control the Extremities of the Fillet the same way as for the Shape Fillet


1

2

Select the Tri-Tangent Fillet Icon

Creating a Tri-Tangent Fillet

3

Click OK to confirm. The Tri-Tangent Fillet is added to the specification tree.

Select the two faces you want to keep

The Tri-Tangent Fillet is a variable radius Fillet tangent to all three faces selected.

Select the face to be removed.

4

The creation of tri-tangent fillets involves the removal of one of the three selected faces.

The three faces must belonging to the same surface.


Additional Information on Fillet : Hold Curve and SpineThis option concerns with all type of fillet : we will focus on the shape fillet creation.

Creating Fillets, you can now choose a curve sketched on one of the support to be connected to control the radius variation. Spine Curve

Hold Curve

Select a hold curve lying on one support to drive the fillet radius, And a spine curve.

Note : the result is a variable radius fillet whose radius is driven by the hold curve.


Additional Information on Fillet : Limiting ElementsThis option concerns the edge, the variable radius, the face-face and the tri-tangent fillets.

While creating one of these fillets, you can limit it by selecting an element (plane or surface) that intersects it completely :

Edge to fillet

Limiting element

Edge to fillet Limiting element


Additional Information on Fillet : Trim ribbonThis option concerns the edge and the variable radius fillets.

In some case, fillets may be overlapping. The Trim ribbons option lets you solve this by trimming the fillets where they overlap.

Overlapping fillets


Additional Information on Fillet : Rolling Edge (1/2)This option concerns the edge and the variable radius fillets.

In some case, you may need to indicate that an edge should not be filleted, if a radius is too large for instance.

Click on the more button to expand the dialog box, then select the edge you wish to keep.


Additional Information on Fillet : Rolling Edge (2/2)

You may need that a fillet roll around an edge.

You just have to expand the edge fillet dialog box clicking on the more button, then select the edge on which the fillet will roll in the Edge to keep field.


Inverting Orientation

You will learn how to invert the orientation of Curves and Surfaces

Inverting a Curve

Inverting a Surface


Why Invert Orientation?

The results of most surface creation and trimming operations depend on the orientations of the elements involved. Most menu interfaces allow the user to change these orientations on the fly.

The Invert Orientation operation exists solely for the user’s convenience.


1

2

Access the Invert Orientation from the Menubar - under Insert/Operation

How to Invert Orientation

3

Click OK to confirm. The Invert operation is added to the specification tree

Select the curve or surface to invert its orientation. The initial display of the red arrow is the already inverted direction.

Clicking on the red arrow or on the Reset Initial button displays the initial (uninverted) orientation of the element

4


Laws

You will learn how to create evolution laws, to be used later on when creating Generative Shape Design elements, such as swept surfaces, or parallel curves.


What are Laws?A law is computed as the distance between points on the reference line and their matching points onto the definition curve.

d

Reference Line

Definition Curve

The law is defined on the common length between both entities.

L

The law define the variations of d along L.

The interest to define laws is to reuse them in others tools. You can reuse this variable distance only to create parallel curves or sweeps.Instead having a constant distance for a parallel curve you will be able to make vary this distance with a predefined law.


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2

Select the Law Icon.

Creating Laws

Click OK to confirm. The law is added to the Specification Tree.

Select the line you want as reference line.

Select the line or curve you want as definition curve for the evolution law.

4

When the reference line and definition curve do not present the same length, only the common area is used to compute the law.

Create an evolution function from existing geometry.

Reference

Definition curve3

Fix a X value or use the manipulators to see the corresponding Y value


Additional Information on LawsYou can combine the laws created within GSD with laws created with the Knowledge Law Editor

Reuse these law combinations in Parallel curves or classic sweeps creation like the other laws.

Define the parameter names and types Select the Law icon in the

Knowledge toolbar.

To reuse the graphic law, check “Select Feature” then use the “Evaluate” object as written above.


In this lesson, you will learn how to use the Draft, Curvature, and Connection Analysis Tools

The Connect Checker

The Curve Connect Checker

Draft Analysis

Curvature Analysis

Porcupine Curvature Analysis

Using Analysis Tools


The Connect Checker

You will learn how to use the Connect Checker tool to analyze the connection between surfaces.


Why the Connect Checker?For surface modeling, to ensure good transition from one surface to another, the Connect Checker allows the user to examine :

• the distance (mm)• the tangency (deg)• the curvature (%)

along an edge joining two surfaces.

Tangency analysis

Curvature analysis

Distance analysis


1 2Multi-Select the two surfaces between which you would like to check the connection

How to use the Connect Checker (1/2)

3

Select the Connect Checker Icon

Choose the Analysis Type : distance, tangency or curvature

45 Adjust the color ranges taking account

your Minimum and Maximum values

Choose the type of Display you require.

Note the Minimum and Maximum values between the two surfaces.


How to use the Connect Checker (2/2)

Click OK to confirm. The Connection Analysis is added to the specification tree7

The number of selected elements and the number of detected connections are displayed. Select the Quick button to obtain a simplified analysis

taking into account tolerances (distance, tangency and curvature).

Check the analysis result on the geometry.6


The Curve Connect Checker

You will learn how to use the Connect Checker tool to analyze the curvature discontinuities on curves.


Why the Curve Connect Checker ?For wireframe based surface modeling, it is necessary to use curve that are continuous in tangency and in curvature. The curve connect checker allows you to detect the point, tangency or curvature discontinuities in order to smooth the non-continuous curves :

• the distance (mm)• the tangency (deg)• the curvature (%)

This curve is discontinuous in tangency.

Building a circle sweep on it, you get a surface that is not continuous in tangency.


How to use the Curve Connect Checker (1/2)This tool allows you to detect the point, tangency and curvature discontinuities on curves.

Distance analysis

Tangency analysisCurvature analysis

The point discontinuities are displayed on the analysed curve.

The curvature discontinuities are displayed on the analysed curve.

The tangency discontinuities are displayed on the analysed curve.

1Select the Curve Connect Checker icon and the curve to analyse.

2 Select the Analyse Type you want to process.


How to use the Curve Connect Checker (2/2)

This option allows the user to give thresholds bellow which the discontinuity is not detected.

If both tangency and curvature discontinuities are detected, only the tangency discontinuity is displayed.

Display of the maximum discontinuity values on the curve.

3 Select the Quick Violation Analysis mode by clicking on the Quick button.

Click OK to confirm. The Curve Connect Checker Analysis is added to the specification tree :

4


Draft Analysis

You will learn how to use the Draft Analysis tool to analyze the draft values of surfaces or solids


Why analyze Draft?

For mold design, Drafts need to be analyzed to determine extractability of the part.

For NC Machining, a part is analyzed to look for negative Draft angles in order to determine if a 5-Axis NC machine will be required to cut the part.


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How to use the Draft Analysis Tool (1/2)

3

Select the customized view render style.

Adjust the color range fields - here Red is negative draft, Dark Blue is 0-3 Degrees (probably vertical), Light Blue is 3-15 Degrees, and Green is 15-20 Degrees

Select the surface(s) or solid where you want to examine Draft

Select the Draft Analysis Icon.

The analysis is displayed on the selected element.

4

The Draft analysis tool gives you at every point the angle between the normal to the surface and the Draft direction which is by default the Z axis.


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How to use the Draft Analysis Tool (2/2)

Click Close when done.

The default Draft direction is the Z axis. To modify it drag and drop the compass on a plane or on the surface.

7

Activate the fly analysis checkbox and navigate with the pointer over the surface

Arrows are displayed under the pointer. Green arrow is the normal to the surface, red represent draft direction.

The displayed value indicates the angle between the draft direction and the normal to the surface at the current point.

The part is not extractible

Using this draft direction, the part sould be extractible

Click on this button to invert the draft direction.

You can manipulate the compass, the analysis follows the w axis as draft direction


Curvature Analysis

You will learn how to use the Mapping Analysis tool to analyze surface curvature


Why Curvature Analysis?

Curvature analysis of surfaces in generally used to help model high quality surfaces.

Abrupt change of curvature on a surface (for example on a car exterior body) can be readily seen by the naked eye and must be smoothed.


What is a Curvature Analysis? (1/2)Curvature analysis of surfaces is used to detect the defaults on high quality surfaces. Abrupt change of curvature on a surface can be readily seen by the naked eye and must be smoothed.The curvature analysis measure the curvature on each point of a surface according to the following method :

curvature radius in one point (R): represents the local convexity of the surface

The curvature in one point (C): C = 1 / Ris the inverse of the radius

Radius measure of the surface intersection with a cutting plane

Curvature measure of the surface intersection with a cutting plane

Radius (R)

Curvature (C)

If radius R ➬ ð curvature C ➮

If radius R ➮ ð curvature C ➬

Intersection Plane / Surface


What is a Curvature Analysis? (2/2)

If we rotate planes around the normal on a point of the surface, we can build the intersection of these planes with the surface.

Point on surface

Normal

On these intersection curves we can measure an infinity of curvature values in this point.

In each point we will have a maximum curvature value CM and a minimum curvature value Cm.

The Mapping analysis tool allows you to measure these minimum and maximum values, the mean value (Gaussian analysis) and to see the inflection areas.

Gaussian : C = CM.Cm Minimum Maximum Inflection area


1 2

Measuring the Mean Curvature on a Surface.

3

Click Close when done

Select the Mapping Analysis Icon

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5

Adjust the color range fields taking into account your observation in Step 3. The objective is to differentiate the various curvature sub-areas of the surfaces

Pass the mouse over the surfaces and read the curvature values shown in order to get a general idea of curvature variation on the part

Select the surfaces where you want to examine Curvature


Select Gaussian as analysis type.

Change the color scale to linear


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Measuring the Minimum or Maximum Curvature on a Surface.

3


Select the Mapping Analysis Icon

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5

Adjust the color range fields taking into account your observation in Step 3 : drag and drop the arrows or key in directly the right values in the fields.

Pass the mouse over the surfaces and read the curvature values shown in order to get a general idea of curvature variation on the part.



Select Minimum or Maximum as analysis type.

Notice that the minimum curvature is always in the perpendicular plane to the maximum curvature .


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Checking a Surface Using the Limited Radius

3


Select the Mapping Analysis Icon4

6



Select Limited as analysis type.

Use the Limited Radius analysis to check if the surface can be offset or to check if tool (an end mill) with a end radius can mill the part.

5 Set the Limited Radius value.

In the green area, the defined tool could not mill the part.


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Checking the Inflection Areas on Surfaces.

3


Select the Mapping Analysis Icon4

5



Select Inflexion Area as analysis type.

In the blue areas, the Gaussian curvature (mean) is negative.

In the green area, the Gaussian curvature (mean) is positive.

Using the Inflection Area analysis type you can check where are the curvature sign changes.


The Analysis is calculated on the mesh used to display the object, the precision of the analysis depends upon the display settings.

Additional Information on Mapping Analysis (1/2)

Fix the 3D Accuracy to the minimum value to have a better analysis rendering.


Additional Information on Mapping Analysis (2/2)Case of a multi surface analysis :

The analysis is done on each surface apart.

The displayed curvature information values are the values of the last selected surface

The analysis is done on all the set of surfaces

The displayed curvature information values are kept on the set of surfaces

Global analysisMulti surfaces analysis


Porcupine Curvature Analysis

You will learn how to use the Porcupine Curvature Analysis tool to analyze surfaces boundaries curvature


Why Porcupine Curvature Analysis?

The Porcupine Curvature analysis is an easy curvature discontinuities visualization tool.

The boundaries of a surface are impacted by the curvature discontinuities of the surface.The Porcupine Curvature analysis analyses the surfaces boundaries in order to detect the surfaces curvature discontinuities.


Using the Porcupine Curvature Analysis (1/4)

This tool can be applied on :-A curve.-A surface (boundaries analysis).

This tool allows you to detect the curvature discontinuities on curves and to visualize them.


Using the Porcupine Curvature Analysis (2/4)Analysis type :

Curvature discontinuities displayed with a

curvature type analysis.

Curvature discontinuities displayed with a radius

type analysis.

You can choose between a curvature type and a radius type analysis.- Curvature : you visualize the curvature evolution on the curve.- Radius : you visualize the radius evolution along the curve.


Using the Porcupine Curvature Analysis (3/4)The diagram :

You can choose to visualize the curvature evolution using the diagram:-Each curve analysis posses its own color for a clearer visualization.- The extremum values are displayed in the diagram window.- You can slide the pointer over the diagram to display the amplitude at a given point of the curve.


Using the Porcupine Curvature Analysis (4/4)The Porcupine Curvature Analysis visualization parameters :

Reverse the curvature values on the analyzed curves.

Display all the extremum on the analyzed curves.

Fills the analysis area.

Envelop the analysis area.

Adjusting these parameters, you can optimize the analysis visualization. It has no effect on the curvature values along the curves.


In this lesson, you will learn advanced tools for managing Open Bodies in the specification tree. You will also learn how to work in a Hybrid environment and in a Multi-Model environment.

Review of miscellaneous WFS tools• Manipulating Elements• Editing Surface and Wireframe Definition• Creating Datum Features• Updating a Part• Applying Material onto Surfaces

Managing the Geometry• Using the Historical Graph• Quick Edition of Geometry• Deleting Useless Elements• Auto-Sorting an OpenBody

Managing OpenBodiesCreating a GroupCreating a New OpenBodyChanging the Father Node of an OpenBodySelecting Bodies using the Body SelectorDuplicating an OpenBody

Managing Features and OpenBodies


WFS Management Features versus GSD Management FeaturesWireframe & Surface Design and Generative Shape Design are two workbenches which have many common functionalities.Within GSD you will discover new functionalities that are not in WFS and also advanced capabilities in some functions that exist in both workbenches.


WFSGSD


Review of WFS Miscellaneous Tools

Manipulating Elements

Editing Wireframe and Surface Definition

Creating Datum Features

Updating a Part

Managing OpenBodies

You can review the tools covered in the Wireframe & Surface Design Course which are also included in the Generative Shape Design Workbench.


Managing the Geometry

You will learn the following tools to help you manage Open Bodies in the specification tree:

Using the Historical Graph

Quick Edition of Geometry

Deleting Useless Elements

Auto-Sorting an OpenBody


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Using the Historical Graph (1/2)

3

Select the feature from which you want to know the hierarchy.

The Historical Graph allows you to display the hierarchical links between the different features of a part.

Select the Historical Graph icon.

Select the Surface Presentation to display the surfacic hierarchical elements.


Using the Historical Graph (2/2)

4a

Click on plus to expand the tree.

to Remove the Graph

Select the Parameter Filter button.

to Add a Graph

Reframe the Graph

You can Edit and modify a Parameter directly by double click on it

4b

Double click a feature to edit and modify it.


Quick Edition of Geometry.

1

Select the geometry

Select the Quick Edit icon.

2

The Quick Edit allows you to quickly access to the parent elements of the selected object.

You identify the generating elements.

Informations are displayed on the whole geometry :

Green : the last element generated in the selected geometry

Red : the direct parent of the last generated element

Purple (with G letter) : the first element that generate the final one

Compare with the historical graph.

You can Edit and modify an element directly by double click on it


Deleting Useless Geometry

1 Select Delete useless elements… in the Tools menu.

2

This command allows you to quickly delete all un-referenced datums, that are not participating in the creation of other geometrical elements.

CATIA gives you a list of elements to delete and ask you to confirm before delete

Click on Yes to confirm.


Auto-Sorting OpenBodies

1 Select the OpenBody node in the Specification tree.

2

This command allows you to sort hierarchically the wireframe features under the selected OpenBody.

Open a contextual menu, then select Auto-Sort OpenBody.

In this specification tree certain features are not in a hierarchical order.


Managing Open Bodies

You will learn the following tools to help you manage Open Bodies in the specification tree:

Creating a Group

Creating a new Open Body

Changing the Father node of an Open Body

Duplicating an Open Body


Why Open Body Management Tools?

In V5, during the creation and trimming of surfaces, the history of parent surfaces is kept in its entirety in order to allow for automatic update of downstream geometry following a modification of any parent surface. Due to this fact, the specification tree can get large and often confusing. The tools listed below help manage this tree.

Creating a Group Hides all the nodes of an Open Body except for specific nodes the user chooses to see.

Creating a new Open Body Creates a new Open Body branch in the specification tree with the option of putting nodes from existing Open Bodies into it. (Allows for multiple groups containing related elements)

Changing the Father node of an Open BodyAllows the user to change the position of an Open Body in the specification tree.

Duplicating an Open BodyOne of the modes of this tool duplicates the Open Body in its entirety. This allows the user to edit nodes in the copied Open Body without affecting the original Open Body.


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Activate “Create Group” in the Contextual Menu for the Open Body you would like to group.

Creating a Group

3

Click OK to confirm. The Open Body is replaced by a group of hidden nodes + the nodes in the Open Body that the user specified to remain displayed.

Name the group.

Select nodes in the Open Body that you would like to remain displayed in the specification tree.

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Hide all the nodes of an OpenBody except for specific nodes the user chooses to show.


1 Activate “Expand Group” in the Contextual Menu for the Group you would like to open.

Expanding and Collapsing a Group

2

Expand the tree under the group node see its contents, and collapse it when it is opened.

Activate “Collapse Group” in the Contextual Menu for the Group you would like to close.


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Activate Insert/Open Body from the Menubar.

Creating a New Open Body

3Click OK to confirm. The new Open Body is added to the specification tree.

Specify the node under which the new Open Body will be inserted.

4

If Part.1 was selected as the Father, the new Open Body will be created under this node

Select nodes from existing Open Bodies that you want to move to the new Open Body.


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Changing the Father Node of an OpenBody or a Feature

3 Click OK to confirm.

Select the destination node (new Father node) for your Open Body (or your feature)

Activate “Change Body” in the Contextual Menu for the Open Body (or the feature) you would like to move.

The Open Body is moved to its new location.


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Selecting Bodies using the Body Selector

Open the combo box of the Body Selector in the Tools toolbar, then choose the new active body.

The body selector allows you to quickly select a specific body to define it in Work Object.

2 You can also rename directly the body in the combo box.


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2

Duplicating an Open Body (1/2)

Click on the Selected then select the corresponding generating features as shown below

Select the Open Body to be duplicated

Select the Duplicate OpenBody icon in the Replication toolbar

3

Click on the green arrow to reverse the extrude direction

Click on “Use identical name” to just create an identical second instance of the selected Openbody.


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Duplicating an Open Body (2/2)

Click on OK to confirm the duplication

Select “As Specified in Part document” as format

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In this lesson, you will learn tools to build Hybrid Part using surfacic and solid features. You will also learn how to work in a Multi-Model environment.

Working with Hybrid Part.

Review of WFS Skillet.• Creating a Solid from Surfaces

• Working in a Multi-Model Environment.

Hybrid Design


Working with Hybrid Parts

You will learn how Surfaces and Solids can be used as modeling tools together within the same model


Why Hybrid Modeling?

With Hybrid modeling we have the best of both worlds:

- the ease of use and concise (inside/outside) mathematical definition of solids

- the capability to create complex surfaces

In this illustration, the Extrude.1 surface is used to create the ThickSurface.1 solid. Later, the Offset.1 surface was defined from the opposite face of the ThickSurface.1 solid.


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V5 and Hybrid Modeling

Surface to Solid Tools

Solid to Surface Tools

Access from within the Part Design Workbench

In general, solid edges are seen by V5 surfaces as any ordinary curve. Solid faces are seen as any ordinary surface. Hence, surface creation tools can use solid edges and faces as input.

Create a surface offset from a solid face

Create a Fill Surface from solid edges

JOIN solid edges into section curves then LOFT between these section curves

Create a Blend Surface between two solid faces

Extract a surface from a solid face


You will learn how to create a solid from surfaces

Creating a Solid from Surfaces


What about solids created from surfaces ? You can use a surface to:- split a solid body- create a solid body by thickening the surface- close it into a solid body- sew it onto a solid body

You may need to create a surface just for using it in a solid body. The surface is integrated into the body design.

Why Do You Need to Create a Solid from Surfaces ?

Split Body

Thicken Surface

Close Surface

Sew Surface


For each type of feature a dialog box is displayed.

1 Click on any Surface-Based Features icon.

2

Select the surface to be processed.

Let ’s see now the different ways to create surface-based features ...

3 Confirm feature creation.

Creating a Solid from a Surface …


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Splitting a Body with a Surface

Select the surface used as splitting element and orient the arrow towards the material to be kept.

Splitting surface

Material to be kept

3 Click OK to split the body.


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Thickening a Surface

Select the surface to be thickened.

Surface to be thickened

3 Click OK to thicken the surface.

Offset direction


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Closing a Surface into a Body

Select the surface to be closed.

Surface to be closed

3 Click OK to close the surface.


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Sewing a Surface to a Body

Select the surface to be sewn onto the body and orient the arrow towards the material to be kept.

Surface to be sewn

Material to be kept

3 Click OK to sew the surface to the body.


Working in a Multi-Model Environment


Why Work in a Multi-Model Environment?

- To reuse already existing geometry

- To establish associativity between parts


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Surface Modeling and Multi-Model Environment

Directly select geometry in the Passive Model to create a surface in the Active Model

The passive element selected is shown as an “External Reference” within the specification tree of the Active Model

In this case, the Offset.1 surface has the Surface.1 External Reference as its parent. As usual, changes in the parent will propagate downstream.

Select the Offset icon (for instance) 2

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