3-pat design fundamentals

7/28/2019 3-Pat Design Fundamentals

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1

CATIA TrainingFoils

Part DesignFundamentals



Objectives of the course

In this course you will learn basic methods to create and modify

solids features and parts

Targeted audience

New CATIA V5 Users

Prerequisites

CATIA Basics

Course Presentation

1 day

2



3

Table of Contents (1/2)

1. Introduction to Part Design p. 5

2. Sketch Based Features p. 13

1. Creating Pads p. 14

2. Creating Pockets p. 29

3. Creating Thin Solids p. 39

4. Creating Shafts p. 43

5. Limiting Features p. 56

6. Creating Holes p. 66

3. Dressing-Up Features p. 78

1. Creating Drafts p. 79

2. Variable Draft Angles p. 92

3. Filleting p. 100

4. Chamfering p. 123

5. Drafted Filleted Pads p. 129

6. Drafted Filleted Pockets p. 134

7. Shelling a Part p. 1398. Threads and Taps p. 145

9. Creating Patterns p. 153



4

Table of Contents (2/2)

4. Modifying Parts p. 167

1. Modifying Profile Geometry p. 168

2. Reordering Features p. 175

3. Modifying Features p. 179



Introduction to Part Design

You w i l l becom e famil iar with the CATIA V5 Part Design m ain features

5



What is Part Design?

The Version 5 Part Design application makes it possible to design precise 3D mechanical parts with

an intuitive and flexible user interface, from sketching in an assembly context to iterative detailed

design. Version 5 Part Design application will enable you to accommodate design requirements for

parts of various complexities, from simple to advanced.

This new application, which combines the power of feature-based design with the flexibility of aBoolean approach, offers a highly productive and intuitive design environment with multiple design

methodologies, such as post-design and local 3D parameterization.

As a scalable product, Part Design can be used in cooperation with other current or future

companion products such as Assembly Design and Generative Drafting. The widest application

portfolio in the industry is also accessible through interoperability with CATIA Solutions Version 4 to

enable support of the full product development process from initial concept to product in operation.



Part Design Interface : General Presentation

CATPart extension

Part Design

tools...

Sketcher

access...

Part tree

Standard

tools

Features...



Part Design Interface

See Wireframe

and Surfaces

Insert menu

Sketch-based

Transformations

Operations

Constraints

Dress-up



Part Design Terminology

• A Part is a combination of one or more features,

and bodies• The first feature is generated from a sketch

(profile), by extrusion or revolution

• Features are components based on sketches

(sketch-based ) or on existing features (dress-up

and transformation ). They can also be generated

from surfaces (surface-based )

• A body is a set of features that can be assembled

to a part through Boolean operations (Assemble,remove, ...)



Part Design General Process

From Assembly

> create a new part

(Top-down approach)

or

Create a new part> insert in assembly

(Bottom-up approach)

Generate the

main pad

Create

additionalfeatures

Add dress-up

features

Modify &

reorder features

Insert new

features or

bodies for more

complex parts

43

2

1

5

6

Sketch the

profile of themain pad



To Sum Up ...

You have seen CATIA V5 Part Design User interface:

How to access the workbench

Its user interface and tools

The terminology that will be used

The general design process

... and Basic functions:

Extruding features (pads, pockets)

Adding fillets, drafts

Mirroring and shelling the part



Sketch Based Features

Creating Pads

Creating Pockets

Creating Thin Solids

Creating Shafts

Limiting FeaturesCreating Holes

To Sum Up

13



Creating Pads

You wi l l learn how to create simple pads from a 2D prof i le (or sk etch)

Extruded Pad

14



15

What is a Pad ?

• A pad is a basic solid which is extruded from a 2D profile, called sketch

• It is one of the first features that can be created when starting a new part

Extruded pad2D profile (sketch)

• Its length can be defined by dimensions (exact values) or with

respect to other 3D elements (thus associative).

Length

Length types



16

Creating Simple Pads ...

Select the profile

Define the pad’s

dimensions2

1

OK to validate3



17

Creating a Simple Pad

Select the Profile

sketch to be used

for the Pad

The Pad definition can be

modified after creation by

double clicking on the Pad

geometry or product structure

Modify the Paddefinition3

1

Select the Padicon2

You get:



18

Pad : Selection of a Sub-Part of a Sketch (1/2)

Select the Pad icon (be sure

that no sketch is selected)If necessary, select the Sub-elements

option from the appearing dialog box

1

2

3

Using the right mouse button

(MB3) on the Profile Selection

field, select Go to profile

definition

When creating a Pad, it is possible to select only certain sub-elements of

a sketch as the pad profile



19

Pad : Selection of a Sub-Part of a Sketch (2/2)

Select one edge of the sub-

element you want to extrude4

When creating a Pad, it is possible to select only certain sub-elements of

a sketch as the pad profile

5 Select OK

You get:

6 Select OK

M lti L th P d (1/3)



20

Multi-Length Pad (1/3)

Select the Multi-lengthpad icon

The Pad Definition dialog

box is displayed. You cansee the number of domains

to be extruded.

You can extrude multiple profiles belonging to a same sketch using different length

values. The multi-pad capability lets you do this at one time.

1

2 Select the Sketch.

Note that all profiles

must be closed and

must not intersect.

3




21


A red arrow is displayed normal to

the sketch. It indicates the proposedextrusion direction. To reverse it,

you just need to click it.

4



5Select a Domain in the list. This one now

appears in blue in the geometry area.




22


Specify the length by entering a value.

For example, enter 20mm. Repeat the

operation for each extrusion domain.

6



7 Click OK to create the Multi-heightPad.

Note that you can multi -

select extrusion domains in

the list before defining a

common length or thickness.

Pad : Reverse Side



23

Pad : Reverse Side

The Reverse Side button applies to open profiles

only. This option lets you choose which side of

the profile is to be extruded

Select the Pad icon1 Select the open sketch2

Modify the Pad length3

Select the arrow to reverse the pad side (or

click the Reverse Side button in the dialog box)4

Select OK in the dialog box5

You get:

Additional Information (1/5)



24

Additional Information (1/5)Open prof i les

CATIA allows you to create pads from open profiles provided existinggeometry can trim the pads. Example on the right illustrates thisconcept.

Cavity

Arc Pad

Square & circle

Mult iple prof i les • Pads can also be created from sketches

including several profiles. These profiles must not

intersect.

• In this example, the sketch to be extruded is

defined by a square and a circle. Applying the Pad

command on this sketch lets you obtain a cavity




25


It is also possible to add other sub-elements during the profile

definition

Add ing Sub-Elements

Select Add

Select the Sub-element

to be added




26


It is also possible to remove other sub-elements during the

profile definition

Remov ing Sub-Elements

Select Remove

Select the Sub-element

to be removed




27


Capability to solve ambiguity when selecting a sub part of a

sketch

Solv ing Ambigui ty

Select the edge

Ambiguity

Select the edge

to solve the

ambiguity

You get:




28


If no sketch has been created when activating the Pad icon, you can access the Sketcher by

selecting the Sketcher icon in the dialog box. When you have completed the sketch, you can

leave the Sketcher then you will return to the Pad creation

Select the Sketcher icon in the

dialog box then select the

sketch plane

Creating Pockets



Creating Pockets

You wi l l learn how to create simple pock ets from a 2D prof i le (or sk etch)

Through PocketBlind Pocket

29

What is a Pocket ?



30

What is a Pocket ?

• A pocket is removing material from an existing feature, by extruding a 2D profile

Pocket2D profile (sketch)

• Its length can be defined by dimensions (exact values) or with

respect to other 3D elements (thus associative).

Length

Length types

Creating Simple Pockets ...



31

g p

Select the profile

Define pocket’s dimensions 2

1

OK to validate3

Creating a Simple Pocket



32

g p

Select the Profile sketch

to be used for the Pocket

Pockets can also be created

from sketches including

several profiles. These profiles

must not intersect

Modify the

Pocket

definition

3

1

Select the Pocket icon2

You get:

Multi-Length Pocket (1/3)



33

g ( )

Select the Multi-length

pad icon

The Pocket Definition

dialog box is displayed. You

can see the number of domains to be extruded.


values. The multi-pocket capability lets you do this at one time.

1


Note that all profiles

must be closed and

must not intersect.

3

Note that a red arrow is displayed

normal to the sketch. It indicates the

proposed extrusion direction. To

reverse it, you just need to click it.




34

4



5

Select a Domain in the list. This one nowappears in blue in the geometry area.

Specify the length by entering a value.

For example, enter 10mm. Repeat the

operation for each extrusion domain.

Note that you can multi-select extrusion

domain from the list before defining a

common length or thickness.




35

6



Click OK to create the Multi-height Pad.

Pocket : Reverse Side



36

The Reverse Side button applies to open profiles

only. This option lets you choose which side of

the profile is to be extruded

Select the Pocket icon1 Select the open sketch2

Modify the Pocket Depth3

Select the arrow to reverse the pocket side (or

click the Reverse Side button in the dialog box)4


You get:




37

Open prof i les

CATIA allows you to create pockets from openprofiles if existing geometry can limit thepockets. The example illustrates this

concept.

8 pockets

Open profile Pocket

8 profiles

Mult iple pro f i les •

Pockets can also be created fromsketches including several profiles. These

profiles must not intersect. In the example,

the initial sketch is made of eight profiles.

Applying the Pocket command on this

sketch lets you create eight pockets

Can a po cket create material? • If your pocket is the first feature of a new body, CATIA

creates material.




38

If no sketch has been created when activating the Pocket icon, you can access to the Sketcher

by selecting the Sketcher icon in the dialog box. When you have completed the sketch, you can

leave the Sketcher then you will return to the Pocket creation

Select the Sketcher icon

in the dialog box then

select the sketch plane

Creating Thin Solids



g

You wi l l learn how to create a Sketch B ased feature know n as Thin Sol ids.

39

What are Thin Solids ?



40

Thin Solids are features resulting from adding Thickness to both sides of a pad’s profile.

Profile to extrude

Resulting Thin Pad

This task can also be applied on Pocket.

Profile to extrude Resulting Thin Pocket

Creating Thin Solids (1/2)2 Select the Pad icon



41


Select the Pad icon.

The Pad Definition Dialog box is displayed. You

can now define your Thin Pad using the options

available in the Thin Pad Frame.

3Enter Thickness1 and Thickness2 values after clicking on

More in the Dialog box. You can see that Material has been

added to both sides of the Profile.

4To add Material equally to both sides, check Neutral fiber.

Thickness1 is then distribued equally. Note that Thickness2

is not available.

Creating Thin Solids (2/2)



42

Using the Thin Pad option, it is possible to extrude Profiles from Networks. The

resulting Features do not depend on the wire creation order in Networks.

With Merge Ends Without Merge Ends

5

Creating Shafts



You wi l l learn how to create simple Shafts from a 2D prof i le (or sketch )

Shaft

43

What is a Shaft ?



44

Lim its : First angle

• A shaft is a basic solid obtained from the revolution of a 2D profile around

an axis

• The axis and the profile must be created in the same sketch

Shaft2D profile (sketch)

• This angle defines the revolution angle of the profile around the

axis, starting from the profile position and orientated in the

clockwise direction

Angular Limits

Limi ts : Second angle

• This angle defines the revolution angle of the profile around the

axis, starting from the profile position and orientated in the

counterclockwise direction

Creating Simple Shafts ...



45

Select the profile

Define the shaft’s angular

limits

2

1

OK to validate3

Creating a Shaft



46

Select the Profile sketch to

be used for the Shaft

By offsetting the rotation axis

off of the profile, the resulting

part can be hollowed.

1Select the

Shaft icon

In order to create a

shaft, the sketch

must include the

rotation axis

Modify the

Shaft

definition

3

2

You get:

Shaft : 3D Line AxisWhen creating a shaft, it is possible to use a 3d line or a



47

Select the Shaft

icon1 2 Select the profile

g , p

sketched line not included in the sketch of the profile as the

rotation axis3 Select the Axis field in

the dialog box

4 Select the 3d line as the

rotation axis

You can modify the Limits

parameters then select OK, you

get:

5

Shaft Creation: Using a 3D Wireframe as ProfileIt is possible to select a planar wireframe as the profile when



48

Select the Shaft

icon1 2 Select the following 3D

wireframe as the Profile

creating a shaft3 Select the axis

selection field

4 Select the following sketch as

the axis

Select Ok i n the dialog box5

You get:

Shaft : Reverse Side

The Reverse Side button applies to open profiles only This option lets you choose



49

The Reverse Side button applies to open profiles only. This option lets you choose

which side of the profile is to be extruded

Select the Shaft icon1Select the open sketch2

Modify the Shaft Angles3

Select the arrow to reverse the shaft side (or click

the Reverse Side button in the dialog box)4

Select OK in the dialog box5 You get:

Shaft : Reverse Direction



50

1

2 The Shaft Definition dialog box appears.

The name of the selected Sketch will be

displayed in the Selection field from the

Profile frame.

3The selection field in the Axis

frame is reserved for axes you

select.

4

Select the Shaft icon.

Clicking the Reverse Direction

button reverses the revolution

direction.

Additional Information (1/5)Shaft with two angular limits :



51

Error

Axis on a profile edge :

Axis outside the profile :

Axis cutting the profile :

Open profile :

Open profile and axis outside the profile :

Error

Additional Information (2/5)It is also possible to use a 3D wireframe as profile when creating a groove, a stiffener, a

ib l t



52

rib, or a slot


Like for pad or pocket creation, you can use sub-elements of a sketch to



53

p p , y

create a shaft


You can create Shafts from sketches including several closed profiles. These profiles must not



54

g p p

intersect


If no sketch has been created when activating the Shaft icon, you can access the Sketcher by



55

selecting the Sketcher icon in the dialog box. When you have completed the sketch, you can

leave the Sketcher then you will return to the Shaft creation

Select the Sketcher icon

in the dialog box then

select the sketch plane

Limiting Features



You w i l l learn the di f ferent ways to l imit features

Up-to-next LimitUp-to-last Limit

56

Why Different Types of Limits ?

• You can specify dimensions to limit a feature



57

• You can specify dimensions to limit a feature

• You can also limit features onto existing elements. In this case,

associativity will propagate design changes

• Using "Up to Last" to extrude a pad maintains the configuration

even with the insertion of a new feature (see example below)

Up to Last

To captu re the design intent

Limiting Features...

Dif ferent types o f l imit



58

• Dimension type: you specify the dimensions (ex: 25 mm)

• Mirrored Extent: Mirrors the feature about it's profile

Up to LastUp to Next

Up to Plane

Up to Surface

Uses a plane or face to

limit feature

Uses a surface to limit featureUses the last encountered

material to limit feature

Uses the next encountered

material to limit feature

.LIM1LIM2

Dif ferent types o f l imit

“Up to Last” Pads/Pockets

Select the Profile sketch to be1 Select2



59

Select the Profile sketch to be

used for the Pad

The “Up to Last” type is also

used for defining the limits of

Pockets

Modify the Pad definition to

include type “Up to last”3

1 Select

Pad icon2

You get:

“Up to Surface” Pads/Pockets

Select the Profile sketch to be

d f th P d1

Select the2



60

used for the Pad

The “Up to Surface” type is

also used for defining Pockets

limits

Modify the Pad definition to

include type “Up to Surface”

3

Select the

Pad icon

Select the limit

surface on the part4

2

You get:

Mirroring a Pad with “Mirrored Extent”

Select the Profile1S2



61

Using “Mirrored Extent” instead of the

Mirror function streamlines your

product structure

sketch to be used for

the Pad

1Select Pad icon2

Select “Mirrored Extent”to mirror the Pad about

the profile with the

specified limit

3

You get:

Offset on Pad Limit (1/2)When creating a pad using the Up to surface

option as one of the pad limit, it is pos sible to



62

Activate the Padicon

Select the Up to surface as FirstLimit Option using the combo1 2

3Select the Profile

define a posit ive or negative offset from th e

selected surface

4 Select the face

Offset on Pad Limit (2/2)When creating a pad using the Up to surface

option as one of the pad limit, it is pos sible to



63

Enter -25 as the Offset5

6 Select OK

define a posit ive or negative offset from th e

selected surface

You get :


Limi t ing Holes & Pockets Special case



64

• Whatever hole you choose, you need to

specify the limit you want. There is a

variety of limits:

Up-to-Plane

/ Surface

g

Up-to-Last

Blind /Dimension

Up-to-Next

• When using the Up-to-Next option:

Special case


When creating a pad/pocket using the Up to surface option as one of the pad/pocket limits



65

When creating a pad/pocket using the Up to surface option as one of the pad/pocket limits,

you can access the following contextual menu in the Offset field:

To create or edit a formula between

The Offset and another parameter

To change the Offset value through a

dialog box

To add a maximum and minimum

tolerance on the Offset parameter

To modify the incremental value of

the Offset

To enter a measure, in order to send

the result of the measure into the

Offset parameter

To define a range : the Offset value

cannot go beyond or below

To add a comment on the Offset

parameter

Creating Holes



You wi l l learn how to create di f ferent types of hole and locate them on exist ing features

Through Hole ...Blind Hole Countersunk

66

What is a Hole ?

• A hole is removing circular material all at once, from an existing feature

It l th b d fi d b di i ith t t th 3D l t



67

• Its length can be defined by dimensions or with respect to other 3D elements

• Note that you do not need a sketch to create a hole. The sketch of the

hole is automatically created. To locate precisely a hole after creation,

you edit its sketch and constrain its center point for example

Concentric HoleApproximate

location

• The hole can be roughly or precisely located. You can locate precisely a

hole at creation or after

Rough or Prec ise Locat ion?

Sketch or not ?

• You will use Hole instead of Pocket because you can create holes including

technological information such as thread, angle bottom, counter bore ...

Creating and Locating Holes ...

• To create a hole you need to define its position then its



68

Place the hole

Define hole’s

dimensions

2

1

dimensions

OK to validate3

Creating and Positioning a Hole

Multi-select 21

3 Select the face the

hole will start onSelect the

Hole icon

2



69

Multi-select 2

edges as position

reference

Since holes are sketch

based you can also

position them after they

have been created by

editing the sketch

1

4

Modify the distance to

edges5

Modify the hole definition

Hole icon

You get:

Offset on Hole (1/2)When creating a hole using one of the Up to options, it is

possible to define an offset in accordance with this limit. The

offset can be positive or negative



70

Select the Hole icon

Activate the Up to plane option and

enter 30 as the hole diameter

1

2

3

Select the face on

which the hole will be

placed


Offset on Hole (2/2)When creating a hole using one of the Up to options, it is

possible to define an offset in accordance with this limit. The




71

Select the Limit

field

Enter -10 as the Offset

4 5

6

Select the Select the

limiting plane (face)

p g

7 Select OK

You get:

10

Standard Thread Definition (1/2)Access to standard thread design tables when creating a

threaded hole



72

Select the Hole icon Select the V-Bottom option from the

Bottom combo1 23Select the face on which

the hole will be placed

4 Select the Tread

Definition tab

5 Select the Threaded button Select the Metric Thick Pitch type of

thread6

Standard Thread Definition (2/2)

Enter 20 as the Thread8 9Enter 35 as the Hole

Access to standard thread design tables when creating a

threaded hole



73

Select M20 as the

Thread Diameter Depth

7Depth

10 Select OK

You get:

Note: a threaded hole

will appear as shown

below (ISO)


Types o f hole: Types of extension :



74

Counter bored Simple

Tapered

C o u n

t e r s u n k

Counter drilled

Threading: you can indicate the depth of threading

when creating a threaded hole

Flat bottom V bottom


Hole Diameters Pitch Right or Left Thread Add or Remove

Other Thread Parameters



75

Hole Diameters, Pitch, Right or Left Thread, Add or Remove

Standards

You can choose a left or right

threaded hole by selecting one of

these two buttons

By default, the Pitch is automatically

calculated in accordance with the ThreadDiameter and the standard, nevertheless,

you can modify it to get a non standard

thread

To add or remove one or several

standards, you can use these two

buttons

By default, the Hole Diameter is

automatically calculated in accordancewith the Thread Diameter and the

standard, nevertheless, you can modify it

to get a non standard thread


A coincidence constraint is automatically created between the

selected axis and the anchor point when creating a hole not

normal to the selected surface



76

normal to the selected surface

Coincidence

To Sum Up ...

Creating sketch-based features means:



77

Extruding existing profiles to create pads (& shafts)

Creating pockets (from profiles) and holes on existing pads

Creating thin solids

Limiting features by specifying dimensions or using other features (associativity) with a

view to later design changes

Dressing-Up Features



Creating Drafts

Variable Draft Angles

Filleting

Chamfering

Drafted Filleted Pads

Drafted Filleted PocketsShelling a Part

Threads and Taps

Creating Patterns

To Sum Up

78

Creating Drafts

Y il l l h t t D ft 3D P t



You w i l l learn h ow to c reate Drafts on a 3D Part

Drafted Part

79

What is a Draft ?

• Drafts are angled faces defined on molded parts to make

them easier to remove from molds



80

• Material gets added or removed based on the draft angle

applied to the part during the operation

Mater ial remo ved or added?

Drafted part

Pulling direction: this direction corresponds to the

reference from which the draft faces are definedDraft angle: this is the angle that the draft faces make

with the pulling direction from the neutral element. This

angle may be defined for each face

Neutral element: this element defines a neutral curve

on which the drafted face will lie. This element will

remain the same during the draft. The neutral element

and parting element (this plane,face or surface cuts the

part in 2 and each portion is drafted according to itspreviously defined direction) may be the same element

Pulling direction

Neutral

element

Draft angle

Basic Draft def ini t ion

Note : You can enter a negative angle value

Creating Basic Drafts ...

• To create a draft angle, you need to define the faces to be

drafted then the neutral element

OK to validate

4



81

Select the face to be

drafted

Select the neutral element2

1

Define the draft angle3

Basic Drafts Specify “Selection by Neutral Face” andspecify the draft angle2

Select the Draft

icon

1



82

The Neutral Element will remain the

same during the draft

Select the

neutral face3

The neutral element is

displayed in blue, the

neutral curve is in pink.

The faces to be drafted are

in dark red

You get:

Draft Angle: Neutral Multi-Faces (1/3)

It is possible to select several faces to define the neutral element. By

default, the pulling direction is given by the first face you select



83

Select the Draft

Angle icon

Enter 25 in the Angle field1 2

3Select the faces to be

drafted






84

Select the Neutral

Element Selection field

a

4 5Select the following faces in

the indicated order

b

c






85

Select OK in the dialog

box6

You get:

Draft Angle: Parting = Neutral (1/3)When defining a draft angle with a parting element, you can have, by default, the

parting element is similar to the neutral element



86

Select the Draft

Angle icon

Select the Neutral Element Selection

field

1

2 3Select the faces to be

drafted

Draft Angle: Parting = Neutral (2/3)When defining a draft angle with a parting element, you can have, by default, the




87

Select the plane as the

Neutral Element4 5Select the More button in the

dialog box

Draft Angle: Parting = Neutral (3/3)

Select the Parting = Neutral

button then select OK6

When defining a draft angle with a parting element, you can have, by default, the




88

button then select OK

You get:

Trimming Draft Features using one or several Surfaces (1/2)

1 2 The Draft Definition dialog box appears. Enter 25

degrees as the new angle value then select the face

to be drafted and the plane1 as the neutral element

Select the Draft Angle icon.



89

to be drafted and the plane1 as the neutral element.

3 Click the More button to access

additional options. Choose the Limiting

Element(s) option.

You can limit the face to be drafted by

selecting one or more surfaces that

intersect it completely.

Select the plane2 as the first limiting element and the yz plane as the second one.

Note that the number of the limiting elements is indicated in the dialog box in front

of the Limiting Elements field.

The neutral curve

appears in p ink

and the face to be

draf ted in dark red.

4

Trimming Draft Features using one or several Surfaces (2/2)

5 Click OK to confirm the operation. The face is

now drafted but the part area between both

limiting planes haven’t been modified



90

6

limiting planes haven t been modified.

This task can also be applied on Variable AngleDraft and Reflect Line Draft .

Additional Information

• If you edit the sketch used for defining the initial pad, CATIA integrates

this modification and computes the draft again In the following example

Design changes



91

Initial sketch changed

this modification and computes the draft again. In the following example,

a chamfer was added to the profile

• There are two ways to determine the objects to draft: either by explicitly

selecting the objects or by selecting the neutral element, which makes

CATIA detect the appropriate faces to use.

Selection

• A plane, face or surface that cuts the part in two

Parting element

Neutral element (here

same as parting

element)

Drafted portion

Part ing element:

Variable Draft Angles

You w i l l learn h ow to c reate Variable Drafts on a 3D Part



92

What is a Variable Draft Angle ?

• Drafts are angled faces defined on molded parts to make

them easier to remove from molds. Sometimes, it is

necessary (for resistance or remove from mold reasons) to

define draft angle values that are not constant



93

Defini t ions:

define draft angle values that are not constant

Pulling direction: this direction corresponds to the

reference from which the draft faces are defined

Draft angle: this is the angle that the draft faces make

with the pulling direction from the neutral element. Thisangle may be defined for each face

Neutral element: this element defines a neutral curve

on which the drafted face will lie. This element will

remain the same during the draft. The neutral element

and parting element may be the same element

Points: this field is used to define the location of the

angle values at the intersection between the neutral

element and the faces to be drafted. The draft anglevaries between these points



Variable Draft Angle (1/4) You can define several angles when creating a draft angle

Select the Draft Angle icon1



95

Select the Variable icon2

Select the face to be drafted3


Select the Neutral Element

Select the neutral face5

4



96

Select the Neutral Element

Selection field

Select the Points field6

4


Select the two following

pointsSelect Preview in

7



97

Change these two angles to 30

(double clicking)

Select Preview in

the dialog box

9

8


Select OK in the dialog

box10



98

You get:

Additional Information

You can trim Variable Draft Angle using one or several Surfaces.



99

Filleting

You w i l l learn how to f i l let 3D parts



Fillets

100



Edge Fillets

Specify the Fillet Radius2Select the Edge

Fillet icon

1



103

Select the upper faceand four side edges

3

You get:

Round Corner Fillets

Specify the Fillet Radius

Select the Edge

Fillet icon

Select the edge

to be filleted1 2

3



104

Notice that when the fillet runs over

the edge of the part, CATIA alters the

edge to accommodate the fillet

You get:

Creating a Fillet with Keep Edge : Rolling on an Edge

1 Activate the Edge fillet icon

and select the edge to be

filleted

2 Select the More button in the

dialog box 3 Select the Edge(s) to keep

field



105

filleted

(2)

(1)

4 Select the edge on whichthe fillet will roll

You get :

(3)

(4)

5 Enter the radius value (eg : 30) then

select OK

(5)

Note : This option is also available for the

variable fillet function



Edge Fillet with Limiting Planes, Faces or Surfaces (2/3) You can limit the propagation of an edge fillet

using a plane, a face or a surface

Select the Limiting element

field

4Select the limiting surface

5



108

Select to change

the direction6

Edge Fillet with Limiting Planes, Faces or Surfaces (3/3) You can limit the propagation of an edge fillet

using a plane, a face or a surface




109

You get:



Tritangent Fillets

Select the face to be

removed by the fillet3

Select the Tritangent

Fillet icon

Multi-select the two faces to

be filleted

1

2



113

removed by the fillet

Multi-selecting all three faces tells

CATIA to remove the third selected face

You get:



Variable Radius Fillet: Circular Closed Edge (1/2)

Select the Variable

Radius Fillet iconSelect the Points field

1 2 3Select the edge to be filleted

It is possible to define a variable radius fillet on a circular

closed edge



115

Radius Fillet icon

4 Deselect the default

vertex

Select the two new vertices5



Reshaping Corners when creating Fillets (1/3)

… you obtain :

Sometimes when filleting, you can see that corners resulting from the operation are not

satisfactory. The new capability “Blend Corners” lets you quickly reshape these corners.



118

After checking the Blend Corner(s) option …

At the corner, you can not ice that the

edges need to be round ed again.


1

2 The Edge Fillet Definition

dialog box is displayed Select

3 Enter the Radius value (5mm) then Click

More to access to additional options.Select the Edge Fillet icon.



119

dialog box is displayed. Select

the edges you want to fillet.

These edges appears in the

Objects to fillet field.

4 Click the Blend Corner(s) button to detect the corner(s)

to reshape. In our example, two corners are detected.


56 Click OK to validate.

The setback distance field determines

for each edge a free area measured

from the vertex along the edge.

Enter a value in the setback distance

field (10mm). Click Preview to show the

… you obtain :



120

The Blend corner(s) option is also available

in the Variable Radius Fillet dialog box.

( )

result.


• To add additional points to the edge to be filleted, you can select planes.

CATIA computes the intersections between these planes and the edge to

determine the useful points. In this example, three planes were selected. Now, if

Variable Radiu s Fil lets



121

Variable radius fillet

p p , p ,

you move these planes later, CATIA will compute the intersections again andmodify the fillet accordingly. The intermediate radii can be nil



What is a Chamfer ?• Chamfering consists in removing or adding a flat section from a selected

edge to create a beveled surface between the two original faces common to

that edge. You obtain a chamfer by propagation along one or several edges.



124

Propagation modes

Tangency

Minimal

Creating Chamfers ...

• To create a chamfer, you need to select the edge to be filleted

and to enter the chamfer dimensions



125

Select the edge to be

chamfered1

Enter the chamfer dimensions

2

OK to validate3



Drafted Filleted Pads

You wi l l learn how to create a pad which includ es fi l lets and a draft angle

This opt ion wil l al low yo u to c reate a pad with d raf t and f i l lets sim ultaneously, rather than

creating each featur e separately



Drafted Filleted Pad

129



Drafted Filleted Pad

(1)

1 Select the Drafted Filleted Pad

icon

The Drafted Filleted Pad capability allows you to create a pad including a

general draft, a Lateral Radius, a First Limit Radius and a Second Limit

Radius. The draft angle and the radii are created as individual features

4 Enter the pad Length

5 Enter the draft angle



132

2 Select the sketch to be

used

(2)

3 Select the second limit

(3)

6 Enter the lateral radius

7 Enter the First limit radius

8 Enter the Second limit radius

9 If necessary, reverse the pad

direction

10 Select OK

You get :First limit

radius

Second

limitradius

Lateral

RadiusDraft

Angle

By default, the neutral element used tocompute the draft angle is the first limit of

the pad. However, you can use the second

limit as the neutral element

Additional Information...

• A pad

• A draft angle

• Three fillets

After creating a drafted filleted pad, the tree contains :



133

Drafted Filleted Pockets

You wi l l learn how to create a pock et which in clud es fi l lets and a draft angle

This funct ion wil l al low yo u to create a poc ket with draf t and f i l lets simultaneously, rather

than creat ing each feature separately



Drafted Filleted Pocket

134

What is a Drafted Filleted Pocket ?

• A drafted filleted pocket is a pocket extruded from a 2D profile, whose definition

includes a draft angle and fillets



135

Lateral

Radius Draft

Angle

First

limit

radius Second

limit

radius



Drafted Filleted Pocket

(1)

1 Select the Drafted Filleted

Pocket icon

The Drafted Filleted Pocket function allows you to create a pocket which

includes a general draft, a Lateral Radius, a First limit Radius and a Second

limit Radius. The draft angle and the radii are created as individual features.

4 Enter the pocket depth

5 Enter the draft angle



137

2 Select the sketch to be

used

(2)

3 Select the second limit

(3)

6 Enter the lateral radius

7 Enter the First limit radius

8 Enter the Second limit radius

9 If necessary, reverse the

pocket direction

10 Select OK

You get :

Lateral

RadiusDraft

Angle

By default, the neutral element used tocompute the draft angle is the first limit of

the pocket. However, you can use the

second limit as the neutral element

First limit

radiusSecond

limitradius


• A pocket

• A draft angle

After creating a drafted filleted pocket, the tree contains :



138

A draft angle• Three fillets

Shelling a Part

You w i l l learn how to shel l a 3D part



Shelled Part

139



Shelling a Part

Multi-select the faces to be

removed in shelling operation

Select the

Shell icon

2

Specify the wall

thickness for the Shell31

Select the Other

thickness faces field4



142

The “Outside Thickness” entry adds

material to the outside of the part

definition

You get:

Double click on the dimension

in order to modify the thickness

of the face

5

Enter 10mm in the

appearing dialog boxthen select OK

6

Select OK in the main

dialog box7


• Shelling a feature means emptying it, while keeping a

given thickness on its sides. Shelling may also consist in

adding thickness to the outside

Thickness ins ide & outs ide

Modified thicknesses

Dotted blue lines = Cube before the shelloperation



143

Inside only Inside &

Outside

• It is possible to create a shell with a thickness greater

than the smallest fillet radius on the part

Shel l with Thick ness > Curvature

Faces to be removed

operation

R5

Thickness=15


In some cases, when you want to create a Shell, an error message appears informing you

that the Body cannot be built properly. After closing the window, another message

appears proposing you to Ignore the Faces causing trouble. If you accept, the Shell is

created and the Face causing trouble is removed.

. Ignoring Faces



144

. Extracting Geometry

In some cases, you have to use the “Extract” option in order to shell a Face. With this

command, you can generate separate Elements from initial geometry, without deleting

geometry.

This command is available after clicking a Dialog box prompting you to deactivate the

Thickness feature and Extract the geometry. Once this operation has been done, a node

“Extracted Geometry” is displayed in the tree.

If you have Generative Shape Design workbench installed, the geometry resulting from the

Extract operation is associative.

Threads and Taps

You wi l l learn how to create threads and taps



145



Creating Threads and Taps ...

• To create a thread:



147

Define the Lateral andReference surface

1

Define the thread

parameters2

The thread

appears in the tree3

Thread and Tap (1/2)

1 Select the Thread/Tap icon 2 Select the Lateral Face on

which the thread will be

grooved

3 Select the Reference Face from

which the thread will begin



148

4 In order to define the thread

standard, select Metric ThinPitch in the dialog box

5 To define the Thread Diameter,

select M10 in the dialog box

6 As the Thread Depth, enter 26 in

the Thread Depth field

Thread and Tap (2/2)

7 Select the Preview button in

the dialog box, you will get a

preview of the thread

8 Select the OK button to

validate the thread creation



149

You get:

During the thread creation CATIA helps

you with the thread parameters in

accordance with the selected standard



Additional Information (2/3)Drilling diameter

before tapping

• Refer to (NF

E03-053-1970).

This normative

reference is

linked to NF E03-

051-1982)

Metric Thick Pitch



151


• Refer to (NF E03-

053-1970). This

normative reference

is linked to NF E03-

051-1982)

Metric Thick Pitch (Cont.)

Drilling diameter

before tapping



152



Rectangular Pattern

Select Rectangular

Pattern icon

… then select

pocket to use

for pattern

Specify the second direction as in step2 under the “Second Direction” tab

(Re erse if necessar )

3

Specify the first direction of the pattern by selecting an edge

using “Reverse” to change the direction if needed

2

1



156

Flexibility is added to the function through the parameter

field.

(Reverse if necessary)

You get:

Circular Pattern

Select the feature to be

patterned

1 Select theCircular Pattern

icon

Define the pattern parameters and specifythe rotation axis of the pattern by

selecting the face

3

2



157

Flexibility is added to the function through the parameters

field.

You get:



Pattern of Several Features (1/2)

1 With the Ctrl key held down, select the hole and the fillet

(you can select them from the solid or from the tree) 2 Activate the Circular pattern

icon

It s possible to apply a rectangular, circular or user pattern to several features in

one shot. We are going to apply a circular pattern to a hole and a fillet

(2)

3 Select the Reference field



159

3 Select the Reference field

(1)

4 Select the circular edge to define

the pattern axis of rotation

(3)

(4)

5 Select the Instance(s) field and

enter 6

6 Select the Angular spacing field

and enter 60

(6)(5)



Exploding a PatternCapability to explode a pattern in order to get one feature per instance

Select the Update icon2Select the Explode command from the

pattern contextual menu1



161

You get:




• Deleting the instances of your choice is possible when creating

the pattern. In the pattern preview, just select the points

materializing instances. Conversely, selecting these points again

will make CATIA create the corresponding instances

Delet ing o r adding instances at creat ion



164

Instances selection

•To define a direction, you can select an edge or a planar face. Selecting a

face will allow both directions of a rectangular pattern to be defined or theaxis of rotation normal to the face for a circular pattern

Direct ion of creat ion


•Select the Object field in the dialog box

Adding or removing a feature from the list of features when creating or editing a pattern

To remove a feature from the list of features:



165

•Select the feature to be removed from the tree

•Select OK



Modifying Parts

You w i l l learn how to modify p rof i les and features to change 3D part

Modifying Profile Geometry

Reordering Features

Modifying Features



Modifying Features

To Sum Up

167



Why Modify Profile Geometry?

• Sketch-based features rely on profiles for their shape

• Especially if defined with the proper constraints that represent the

design intent of the part, the profile geometry can easily be changed for

downstream design changes



169

Modified cube

Chamfer added from sketch

•

Changing the sketch that defines a feature propagates thatchange to all subsequent operations involving the feature

Design changes

Modifying Profiles ...

Edit the sketch

di t th

1

Update the Part3



170

corresponding to the

feature to be modified

Modify the profile or the dimensions2

Update the Part3



Deleting Sketcher Elements

Select the element to be deleted1



173

Select the Undo command to restore deleted elements. The

Undo command will remember all changes up to the last time

the part was saved

Select Edit->Delete and the element is

erased. Now multi-select additional

elements to delete

2

Use the contextual menu (select

Mouse Button 3 while the cursor is

on one of the selected elements) to

delete

3 You get:


• To delete a set of 2D elements, multi-select the elements you

wish to delete using the click and drag method. Then go to the

Edit menu and select delete

Delet ing elements



174

Multi-selection

Reordering Features

You wi l l learn how to reorder features making up a 3D part



Pad moved before mirror Pad after mirror operation

175

Why Reordering Features ?

• Reordering features allows you to correct a part so that your

design intent is preserved



176

One cylinder

• Changes as well as features created later in the process can

easily be incorporated into the part structure taking into account

the design intent

Design changes

Two cylinders when moved

before the mirror operation

Reordering Features ...

3



177

Select Reorder in

the feature

contextual menu

1

Select the feature after which

the hole will be placed2

Update the Part

Reordering Features

Right click the feature to be

reordered to get a contextual menu1

Pad.2 was incorrectly created

after the mirror operation, so we

must reorder the pad before themirror

Select Reorder 2



178

Select Pad.1 in the

specification tree as the

feature to reorder after

(Pad.1 is shown as the

preview)

3

You get:

Modifying Features

You wi l l learn how to modify p arameters of 3D features



Modified Pad

179



Modifying Features ...

3



181

Double click on the

feature to be modified

1

Modify the feature dimensions2

Update the Part3

Redefining Feature Parameters

Modify the draft

specifications by

double clicking the

dimension or entering in the

dialog box

2

Double click the feature or it’s

specification to edit the feature

1



182

Next, modify Pad.1 of the part by right

clicking the feature in the specificationtree and selecting Definition...

3

…then modify the

dimension directly or

through it’s dialog box

You get:

Editing Holes

Double click on the feature or its

specification in the tree to edit hole1

Change the hole definition in thedialog box or double click on

dimensions to modify directly

2

Modify the position

dimensions by double



183

dimensions by double

clicking them to modify

directly

You can also reposition a hole without editing it by dragging it to

it’s new location, even if it’s new location is on a different face

You get:

Sketch Edition During Pad Edition

1 Double click on the pad to be

modified

2 Select the sketch icon from the dialog

box in order to activate the sketcher

3 Modify the constraint

(1)

4 Leave the sketcher by

selecting the Exit icon

5 If necessary, select the

Update All icon

(4)



184

(2)

You get :

(3)

(5)

Replacing a Sketch During Pad Edition

1 Double click on the pad to be

modified3 Select the replacing sketch

(1)

4 Select OK

(3)

(4)



185

2 Select the sketch field from the dialog

box

(2) You get :

5 If necessary, select the Update

All icon

(5)


• CATIA allows you to delete features simply by

selecting the feature to delete and selecting delete in

the Edit menu (or right clicking the selected feature

and selecting delete in the contextual menu

Deleting features

• Deleting a feature produces a dialog that can beexpanded to show the impact of deleting the feature: it

allows you to manage the deletion and actually gives

you the opportunity to replace it by another element Deleting a sketch



186

g

To Sum Up...

Modifying 3D parts means:

Modifying a profile shape or location

Reordering features in the tree according to design intent

Modifying feature parameters and deleting elements



187

• When you open a document and the geometry is red, it means you need to update it

• If you want to cancel a modification, click the Undo icon

Hints!

3-pat design fundamentals

Documents