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CATIA TrainingFoils
Part DesignFundamentals
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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
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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
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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
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Introduction to Part Design
You w i l l becom e famil iar with the CATIA V5 Part Design m ain features
5
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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.
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Part Design Interface : General Presentation
CATPart extension
Part Design
tools...
Sketcher
access...
Part tree
Standard
tools
Features...
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Part Design Interface
See Wireframe
and Surfaces
Insert menu
Sketch-based
Transformations
Operations
Constraints
Dress-up
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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, ...)
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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
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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
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Sketch Based Features
Creating Pads
Creating Pockets
Creating Thin Solids
Creating Shafts
Limiting FeaturesCreating Holes
To Sum Up
13
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Creating Pads
You wi l l learn how to create simple pads from a 2D prof i le (or sk etch)
Extruded Pad
14
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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
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Creating Simple Pads ...
Select the profile
Define the pad’s
dimensions2
1
OK to validate3
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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:
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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
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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)
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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
M lti L th P d (2/3)
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Multi-Length Pad (2/3)
A red arrow is displayed normal to
the sketch. It indicates the proposedextrusion direction. To reverse it,
you just need to click it.
4
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.
5Select a Domain in the list. This one now
appears in blue in the geometry area.
M lti L th P d (3/3)
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Multi-Length Pad (3/3)
Specify the length by entering a value.
For example, enter 20mm. Repeat the
operation for each extrusion domain.
6
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.
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
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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)
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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
Additional Information (2/5)
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Additional Information (2/5)
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
Additional Information (3/5)
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Additional Information (3/5)
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
Additional Information (4/5)
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Additional Information (4/5)
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:
Additional Information (5/5)
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Additional Information (5/5)
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
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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
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What is a Pocket ?
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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 ...
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g p
Select the profile
Define pocket’s dimensions 2
1
OK to validate3
Creating a Simple Pocket
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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
definition
3
1
Select the Pocket icon2
You get:
Multi-Length Pocket (1/3)
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g ( )
Select the Multi-length
pad icon
The Pocket Definition
dialog box is displayed. You
can see the number of domains to be extruded.
You can extrude multiple profiles belonging to a same sketch using different length
values. The multi-pocket 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
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.
Multi-Length Pocket (2/3)
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4
You can extrude multiple profiles belonging to a same sketch using different length
values. The multi-pocket capability lets you do this at one time.
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.
Multi-Length Pocket (3/3)
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6
You can extrude multiple profiles belonging to a same sketch using different length
values. The multi-pocket capability lets you do this at one time.
Click OK to create the Multi-height Pad.
Pocket : Reverse Side
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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
Select OK in the dialog box5
You get:
Additional Information (1/2)
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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.
Additional Information (2/2)
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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
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g
You wi l l learn how to create a Sketch B ased feature know n as Thin Sol ids.
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What are Thin Solids ?
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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
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21 Select the Sketch.
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)
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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
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You wi l l learn how to create simple Shafts from a 2D prof i le (or sketch )
Shaft
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What is a Shaft ?
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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 ...
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Select the profile
Define the shaft’s angular
limits
2
1
OK to validate3
Creating a Shaft
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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
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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
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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
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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
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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 :
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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
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rib, or a slot
Additional Information (3/5)
Like for pad or pocket creation, you can use sub-elements of a sketch to
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p p , y
create a shaft
Additional Information (4/5)
You can create Shafts from sketches including several closed profiles. These profiles must not
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g p p
intersect
Additional Information (5/5)
If no sketch has been created when activating the Shaft icon, you can access the Sketcher by
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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
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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
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• 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
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• 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
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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
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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
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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
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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
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Enter -25 as the Offset5
6 Select OK
define a posit ive or negative offset from th e
selected surface
You get :
Additional Information (1/2)
Limi t ing Holes & Pockets Special case
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• 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
Additional Information (2/2)
When creating a pad/pocket using the Up to surface option as one of the pad/pocket limits
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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
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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
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• 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
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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
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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
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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 can be positive or negative
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
offset can be positive or negative
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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
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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
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Select M20 as the
Thread Diameter Depth
7Depth
10 Select OK
You get:
Note: a threaded hole
will appear as shown
below (ISO)
Additional Information (1/3)
Types o f hole: Types of extension :
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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
Additional Information (2/3)
Hole Diameters Pitch Right or Left Thread Add or Remove
Other Thread Parameters
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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
Additional Information (3/3)
A coincidence constraint is automatically created between the
selected axis and the anchor point when creating a hole not
normal to the selected surface
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normal to the selected surface
Coincidence
To Sum Up ...
Creating sketch-based features means:
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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
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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
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You w i l l learn h ow to c reate Drafts on a 3D Part
Drafted Part
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What is a Draft ?
• Drafts are angled faces defined on molded parts to make
them easier to remove from molds
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• 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
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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
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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
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Select the Draft
Angle icon
Enter 25 in the Angle field1 2
3Select the faces to be
drafted
Draft Angle: Neutral Multi-Faces (2/3)
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
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Select the Neutral
Element Selection field
a
4 5Select the following faces in
the indicated order
b
c
Draft Angle: Neutral Multi-Faces (3/3)
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
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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
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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
parting element is similar to the neutral element
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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
parting element is similar to the neutral element
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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.
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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
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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
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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
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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
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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
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Variable Draft Angle (1/4) You can define several angles when creating a draft angle
Select the Draft Angle icon1
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Select the Variable icon2
Select the face to be drafted3
Variable Draft Angle (2/4) You can define several angles when creating a draft angle
Select the Neutral Element
Select the neutral face5
4
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Select the Neutral Element
Selection field
Select the Points field6
4
Variable Draft Angle (3/4) You can define several angles when creating a draft angle
Select the two following
pointsSelect Preview in
7
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Change these two angles to 30
(double clicking)
Select Preview in
the dialog box
9
8
Variable Draft Angle (4/4) You can define several angles when creating a draft angle
Select OK in the dialog
box10
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You get:
Additional Information
You can trim Variable Draft Angle using one or several Surfaces.
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Filleting
You w i l l learn how to f i l let 3D parts
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Fillets
100
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Edge Fillets
Specify the Fillet Radius2Select the Edge
Fillet icon
1
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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
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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
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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
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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
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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
Select OK in the dialog box7
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You get:
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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
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removed by the fillet
Multi-selecting all three faces tells
CATIA to remove the third selected face
You get:
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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
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Radius Fillet icon
4 Deselect the default
vertex
Select the two new vertices5
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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.
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After checking the Blend Corner(s) option …
At the corner, you can not ice that the
edges need to be round ed again.
Reshaping Corners when creating Fillets (2/3)
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.
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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.
Reshaping Corners when creating Fillets (3/3)
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 :
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The Blend corner(s) option is also available
in the Variable Radius Fillet dialog box.
( )
result.
Additional Information (1/2)
• 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
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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
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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.
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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
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Select the edge to be
chamfered1
Enter the chamfer dimensions
2
OK to validate3
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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
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Drafted Filleted Pad
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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
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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 :
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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
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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
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Lateral
Radius Draft
Angle
First
limit
radius Second
limit
radius
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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
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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
Additional Information...
• A pocket
• A draft angle
After creating a drafted filleted pocket, the tree contains :
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A draft angle• Three fillets
Shelling a Part
You w i l l learn how to shel l a 3D part
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Shelled Part
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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
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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
Additional Information (1/2)
• 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
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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
Additional Information (2/2)
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
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. 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
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Creating Threads and Taps ...
• To create a thread:
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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
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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
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You get:
During the thread creation CATIA helps
you with the thread parameters in
accordance with the selected standard
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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
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Additional Information (3/3)
• Refer to (NF E03-
053-1970). This
normative reference
is linked to NF E03-
051-1982)
Metric Thick Pitch (Cont.)
Drilling diameter
before tapping
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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
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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
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Flexibility is added to the function through the parameters
field.
You get:
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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
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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)
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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
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You get:
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Additional Information (1/2)
• 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
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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
Additional Information (2/2)
•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:
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•Select the feature to be removed from the tree
•Select OK
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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
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Modifying Features
To Sum Up
167
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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
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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
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corresponding to the
feature to be modified
Modify the profile or the dimensions2
Update the Part3
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Deleting Sketcher Elements
Select the element to be deleted1
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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:
Additional Information...
• 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
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Multi-selection
Reordering Features
You wi l l learn how to reorder features making up a 3D part
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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
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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
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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
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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
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Modified Pad
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Modifying Features ...
3
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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
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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
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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)
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(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)
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2 Select the sketch field from the dialog
box
(2) You get :
5 If necessary, select the Update
All icon
(5)
Additional Information...
• 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
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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
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• 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!