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Part Design Features Recognition

Copyright DASSAULT SYSTEMES

CopyrightDASSAULTSYSTEMES

Part DesignFeature Recognition

CATIA TrainingFoils

Version 5 Release 17September 2006

EDU-CAT-EN-FR1-FI-V5R17


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Course Presentation

Objectives of the course

You will learn how to use the Feature Recognition tool.

The Feature Recognition functionality, belonging to the Part Design toolbox, enables to buildcomprehensive V5 data structure for solids of which specifications are lost or unreachable, forinstance when imported from another CAD system.

This Feature Recognition operation allows then to operate flexible local design modifications on allkind of models, even when not initially designed with CATIA V5.

Targeted audienceDesigners

PrerequisitesFundamentals about CATIA V5,

including Part Design

0.5 day


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Planning

Part Design Feature RecognitionApplication Exercise

Exercises

Part Design Feature RecognitionPresentation Course

Lesson

Day 1


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Table of Contents

1. What is Feature Recognition ? p. 5

2. Accessing the Workbench p. 6

3. Part Analysis Tool p. 9

4. How to perform a FR ? p. 10

5. Feature Recognition Panel p.12

6. Examples p.16

7. Tips p.19


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What is Feature Recognition ?

Recognized Pad

This isolated solid (B-Rep) can be provided by:

- any CAD-system other than CATIA V5

- a migration as result from CATIA V4.

Feature

Recognition

Operation

We end up with a comprehensive CATIA V5data structure (Product Structure), made ofretrieved elementary Part Design features.


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At any time, the current workbench is indicated by an

icon on the right hand Tool Bar.

Accessing the Workbench

Feature Recognition is acomplementary tool to the Part Designbasic tools.

Actually, Feature Recognition icon isavailable in the Part Design

Workbench.

Part Design Feature Recognition tool isreachable through this panel: the 3 icons

stand for Manual FR, Automatic FR

and a Part Analysis tool.

NEW from R14 !Part Analysis Tool


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Exploring the User Interface (1/2)

Part Design tools

Part tree

Standard

Tools

Feature Recognitionspecific panel

Compass


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Exploring the User Interface (2/2)

Part Design Tools


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Part Analysis Tool

Fillet coloration :

This new command operates on anyPart Design body. It recognizes allrounds and fillets in the body and

colorizes them, depending on the radiiand polarities.The user is able to specify the colorsthat are to be used for certain importantradii, for instance the minimum and

maximum radii.

NEW from R14 !


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How to Perform a FeatureRecognition 1/2

Activate the isolated solid to

be recognized, in the tree

1Click the

Manual FR icon

2

Select the featuretype (hole, fillet)

3

Click the solid element to

be recognized

4

Manual Feature Recognition operation is made of the

following steps:

1. Activating the solid to be recognized, in the tree2. Clicking the Feature Recognition icon

3. Selecting the feature type (hole, fillet) in the panel4. Clicking the geometrical corresponding element to be

recognized

Manually


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How to Perform a FeatureRecognition 2/2

Activate the isolated solid to

be recognized, in the tree

1

Select the featuretype (hole, fillet)

3

Click the solid element to

be recognized

4

Automatic FR operation is made of the same steps as a

Manual FR, except the last step. It is not necessary to

click the geometrical elements to be recognized, this isdone automatically.

Automatically

Click the

Automatic FR icon

2


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Feature Recognition Panel 1/4 Through the Feature Recognition panel, you areable to recreate specifications for the element to berecognized, either manually or automatically.

Manual Feature Recognition Automatic Feature Recognition


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Feature Recognition Panel 2/4

Chain Faces option :

Allows an automatic selection of the

faces which are in contact with the

selected objects.

Especially useful when detecting aholes or grooves, of which faces are not

all easily reachable.

Show Labels option allows to createtags on faces that are part of

recognition selection.

Selected Objects :

A list of the selected objects is

displayed in this window. You can

select as many surfaces as wanted.

To withdraw a face from theselection, click it once more on the

geometry.

Through the Feature Recognition panel, you areable to recreate specifications for the element to berecognized, manually or automatically.

Features :

Major basic features can be recognized:

sketch-based features (pad, pocket, hole,shaft, groove), as well as dress-up features

(fillet and chamfer). In the future, other types of features will

be recognizable, such as stiffeners, ribs,patterns and mirrors.

Selection Type :

The user can input additionalinformation to help the objects

selection, such as:

a limiting face for the selection

with Up to face option

a Neutral Element for draftrecognition

Boolean and Draft :

You can recognize Boolean features

(add/remove), in such cases:

when the initial geometry iscomposed of complex shapes

when the recognition of standard

features fails

Draft can be recognized by selecting

faces making the draft and a neutral

surface.

Manual Feature Recognition

Manual FR allows torecognize a large diversityof feature types, selectingthe geometry in a precise

way.


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Feature Recognition Panel 3/4Feature Recognition allows to recreate CATIA V5 features :

- Thanks to a global recognition tool that analyses the

whole isolated solid

- By selecting faces

Exhaustive list of features that can be recognized

Pad (blind /up to next, normal direction)Pocket (blind /up to next, normal direction)Simple Holes (blind /up to Next)Countersunks Holes (blind /up to next)Counter drill Holes (blind /up to next)Counterbore Holes (blind /up to next)Tapered Holes (blind /up to next)

Fillet (rolling ball, constant radius)Chamfer (length-length)Chamfer (angle-length)Shaft

GrooveDraftBoolean

Annotations, publications and constraints are notrecognized during a recognition operation.

Sketches are created as positioned and they are not

associative. To make them associative, you need toassociate them to a planar face or a plane as support.

About Recognition Operation:


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Feature Recognition Panel 4/4Automatic Feature Recognition allows a smart and

immediate detection of 3 types of features:

holes, fillets and chamfers.

AUTOMATIC Feature Recognition

Automatic FR allows a

simple and fastrecognition, for the 3 most

common feature types.

Features :

The only input in an Automatic FR

operation is the type of features we want torecognize, among holes, fillets and

chamfers. One or several types of features can be

recognized in one single operation.

Selecting the 3D geometry is not

necessary. The recognition is madeautomatically.


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Examples 1/3

Chain Faces

Some Feature Recognition Operation Examples

By checking ChainFaces option, facesadjacent to theselected face areautomatically includedin the Selected

Objects list.


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Examples 2/3Draft


The Draft Feature Creation involves two steps:

-Selecting the draft face(s)

-Selecting a neutral face


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Examples 3/3

Boolean


Boolean recognition allows to recognizecomplex shaped that have been added orremoved.

It is also very useful in case the standardrecognition failed.


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Tips 1/3

In case you made a mistake in your selection, you can remove some elements from

the Selected Objects list:

- Edit the list contextual menu, by right clicking in the Selected Objects window

- Choose between the two options- RemoveSel will remove only the element which you right clicked

- RemoveAll will remove all elements from the list

Tip About Faces Selection


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Tips 2/3

To visualize the whole body

correctly, it is necessary to activate

the main PartBody, using Definein Work Object in its contextualMenu.

To perform a Feature Recognition on a Solid, the latter has

to be the active element.

>> Dont forget to choose Define in Work Object in thecontextual menu before performing a recognition

After having performed the Feature

Recognition operation, the active

part by default is still the initialsolid, therefore the pad is notvisible

Tip About Active Elements


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Tips 3/3After having recognized some elements as V5 features, we can edittheir parameters and modify them, the usual way:

- By double-clicking them in the specification tree- By reaching them directly in the geometry

Tip About Feature Rework

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