4-assembly design fundamentals ex
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Copyright DASSAULT SYSTEMES 2002 1
Assembly DesignFundamentals
CATIA TrainingExercises
Version 5 Release 10
December 2002
EDU-CAT-E-ASM-FX-V5R10
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Table of Contents
1. Connector Assembly p. 3
Connector Assembly: Presentation p. 4
Connector Assembly (1): Assembling Component p. 8
Connector Assembly (2): Positioning Components p. 11
Connector Assembly (3): Analyzing the Assembly p. 14
Connector Assembly (4): Editing Part p. 17
Connector Assembly (5): Working with Components p. 20
2. Vice Assembly p. 23
Vice Assembly: Presentation p. 24
Vice Assembly (1): Creating the Structure p. 27
Vice Assembly (2): Positioning Components p. 29
Vice Assembly (3): Editing Parts p. 33
Vice Assembly (4): Inserting Fitting Components p. 36
3. Flexible sub-assemblies p. 41
Flexible sub-assemblies : Presentation p. 42
Flexible sub-assemblies (1) :Assembling Components p. 45 Flexible sub-assemblies (2) :Constrain Full Assembly p. 47
Flexible sub-assemblies (3) :Change configuration p. 49
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Connector Assembly
Connector Assembly : Presentation
Connector Assembly (1): Assembling Components
Connector Assembly (2): Positioning Components
Connector Assembly (3): Analyzing the Assembly
Connector Assembly (4): Editing Part
Connector Assembly (5): Working with Components
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Exercise
Connector Assembly: Presentation
60 mn
Object ives:
In this exercise you will build the
Connector Assembly and modify one of
its components
This assemb ly wi l l be bui l t
You wil l use :
- Product Structure Tools
- Constraints
- Compass
- Analyze Clash- Part Design in-context of Assembly
- Standard tools
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Design Process: Connector Assembly
Create and name the assembly, insert
components, duplicate the shell , assign
Instance Names , and save the assembly
1
Position the components
using constraints.
2
Check for interference.
3
4
Edit the Shell by designing
in-context of the assembly
Pattern the Screw.
5
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Exercise
Connector Assembly (1) : Assembling Components
In this step you create and
name an assembly, insert
components, duplicate the
shell, assign Instance Names,
and save the assembly
15 mn
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And now practice in the context of the Connector Assembly
Create and name the assembly, insert
components, duplicate the shell , assign
Instance Names , and save the assembly
1
Position the components
using constraints.
2
Check for interference.
3
4
Edit the Shell by designing
in-context of the assembly
Pattern the Screw.
5
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Do It Yourself
1- Create a new CATProduct document and set the part number to be Connector Assembly.2- Add the Connector Card Assembly (CATASMConnector_Card_Assembly.CATProduct) sub-
assembly and the Connector Shell (CATASMConnector_Shell.CATPart).
3- Duplicate the Connector Shell component.
4- Assign Instance Names to the Connector Shell components.
5- Save the assembly as Connector Assembly 2.CATProduct.
Inserted components
Duplicate instance of
Connector Shell
To avoid looking for the correct folder
where the inserted components are
stored, begin a Save as with the
loaded Document , then Cancel it.Load: Mex1/CATASMConnector_Assembly_1.CATProduct
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Exercise
Connector Assembly (2) : Positioning Components
In this step you will Fix-in-Space the Connector Card Assembly and set
Coincidence and Contact constraints between the Shells and the Connector
Card
20 mn
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And Now Practice in the Context Of the Connector Assembly
Create and name the assembly,
insert components, duplicate the
shell , assign Instance Names ,
and save the assembly
1
Position the components
using constraints.
2
Check for interference.
3
4
Edit the Shell by designing
in-context of the assembly
Pattern the Screw.
5
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Do It Yourself
1- Fix-in-space the Connector Card Assembly.2- Set an axial coincidence between corresponding holes of the Top Shell and the Connector Card.
3- Set a contact between the top face of the card and the inside face of the Top Shell.
4- Set an axial coincidence between corresponding holes of the Bottom Shell and the Connector Card.
5- Set a contact between the underside face of the card and the inside face of the Bottom Shell.
6- Save the assembly as Connector_Assembly 3.CATProduct.
Inside Face
Load: Mex2/CATASMConnector_Assembly_2.CATProduct
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Exercise
Connector Housing (3) : Analyzing the Assembly
In this step you will check for interference between the
Connector Card Assembly and Connector Shells
15 mn
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And now practice in the context of the Connector Assembly
Create and name the assembly,
insert components, duplicate the
shell , assign Instance Names ,
and save the assembly
1
Position the components
using constraints.
2
Check for interference.
3
4
Edit the Shell by designing
in-context of the assemblyPattern the Screw.
5
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Do It Yourself
1- Analyze for clash between the Connector Card Assembly and Connector Shells.
2- Do not make any changes to the assembly at this time.
3- Save the assembly as Connector Assembly 4.CATProduct for use in the next step.
Connector Card Assembly
Connector Shell
Load: Mex3/CATASMConnector_Assembly_3.CATProduct
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And now practice in the context of the Connector Assembly
Create and name the assembly, insert
components, duplicate the shell , assign
Instance Names , and save the assembly
1Position the components
using constraints.
2
Check for interference.
3
4
Edit the Shell by designing
in-context of the assembly
Pattern the Screw.
5
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Do It Yourself
Dimensions for the pocket in the Connector Shell
Connector Shell showing
the new pocket
1- No-show the Bottom Shell.
2- Modify the Connector Shell to suppress the clash with the Connector Card Assembly.
3- Save the Connector Shell as Connector Shell 5.
4- Save the assembly as Connector Assembly 5.CATProduct.
Load: Mex4/CATASMConnector_Assembly_4.CATProduct
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D It Y lf
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Do It Yourself
Screw
Pattern
1- Add the Screw part.
2- Set an axial coincidence between corresponding hole of the Top Shell and the Screw.
3- Set a contact between the face of the Top Shell and face of the Screw.
4- Use the rectangular pattern in the Connector Shell to duplicate the Screw
5- Save the assembly as Connector Assembly 6.CATProduct.
To avoid looking for the correct folder
where the inserted components are
stored, begin a Save as with the
loaded Document , then Cancel it.
Load: Mex5/CATASMConnector_Assembly_5.CATProduct
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Design Intent: Vice Assembly
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Design Intent: Vice Assembly
Create and name the root assembly (Vice Assembly) and its sub assemblies
(RotatingComponent, FixedComponent and AxisAssembly)
Design holes in both jaws in order to allow fittingPosition the Components (constrain them as shown below)
Add Components inside appropriate assemblies :
- Axis and Axis Nut in AxisAssembly- 2ndStaticJaw, Static Jaw , Jaw Holder Flange (2 ones) and Movable Jaw Holder in FixedComponent
- Movable Jaw in Vice Assembly
Browse GeneralEnd catalog in order to find and insert fitting elements in appropriate assemblies
RotatingComponent
Movable Jaw
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Do It Yourself (1/3)
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Do It Yourself (1/3)
1- In AxisAssembly , create
coincidence and contactbetween highlighted elements
Coincidence
Contact
2- In RotatingComponent ,
create coincidence and contactbetween highlighted elements
and save the active assembly as
RotatingComponent3in
StudentFolder
Coincidence
Line Contact
Load: Addex2/CATASMViceAssemblyStep2.CATProduct
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Do It Yourself (3/3)
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( )
4- In ViceAssembly, constrain
geometric elements as shown and
save the active assembly as
CATASMViceAssemblyStep3 in
StudentFolder
Two contacts
coincidence
contact
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Do It Yourself (1/2)
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2- In 2ndStaticJaw
a- create a hole (diameter = 11mm, up to next) in the front face of the Static Jaw (a counterbored one)
b- set the hole concentric to one of the holes in parts behind
c- create a sketch based on the same front face(name it PatternPoints) and draw 3 points concentric to
last 3 holes in parts behind
d- create a user pattern of the hole using PatternPoints for the Positions and keeping specifications of
the object to pattern
e- save the new part under another name (CATASM2ndStativJaw4.CATPart) under StudentFolder
Concentricity
Concentricity
Concentricity
Concentricity
PatternPoints Sketch
1- Set wireframe rendering style for transparency
Load: Addex3/CATASMViceAssemblyStep3.CATProduct
Do It yourself (2/2)
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3- In StaticJaw
a- create a hole (diameter = 11mm, up to next) in the front face of the Static Jaw (a counterbored one)
b- get it concentric to one of the holes in parts behind
c- create a sketch based on the same front face and draw 3 points concentric to last 3 holes in parts
behind, rename the Sketch PatternPointsd- create a user pattern of the hole using PatternPoints for the Positions and keeping specifications for
selected object
e- save the part under another name (CATASMStaticJaw4.CATPart)
Concentricity
Concentricity
Concentricity
Concentricity
4- Set the FixedComponent active and save it as FixedComponent4.CATProduct under StudentFolder
5- set back the shading with edgesrendering style
PatternPoints Sketch
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Do It Yourself (1/4)
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1- In FixedComponent
we want to insert and instantiate screws
with fitting dimensions
a- To determine diameters and lengths of
inserted screws, measure diameters of
threaded holes and thickness that screws
have to go through
Note carefully the measured diameters and
distances because you will need them to
make queries on the end chapter of a
catalogCrossed
thickness
Crossed
thickness
Threaded
Holes
Inserted
Screws
Load: Addex4/CATASMViceAssemblyStep4.CATProduct
Do It Yourself (2/4)
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b- Browse GeneralEnd.catalog to select and
insert Hexagonal Socket Head Screws in
FixedComponent : make queries in chapter to
get those conditions respected
- diameters of selected screws must be
equal to diameters of threaded holes
they go into
- lengths must be superior or equal to
(crossed thickness +15mm)
Insert the selected screws in FixedComponent
c- Instantiate and constrain as many time as
needed (reuse Pattern if possible) inserted
screws
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Do It Yourself (4/4)
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b- Browse GeneralEnd catalog to select and
insert an Outer Retaining Ring in
ViceAssembly : select the ring in order toget this conditions respected
- the Groove Diameter of the selected
retaining ring must be equal to the
measured diameter
c- Insert the selected ring in Vice Assembly
and constrain it to the Big screw
coincidence
contact
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Design Intent: Flexible Assemblies
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All elements you need to complete
exercise :
sub-clamp.CATProduct.
Clamp-pad.CATPart.
Skills needed :
Insert existing components to create a assembly
Duplicate a sub-assembly
Constraint a assembly
Making a product flexible in order to drive
dimension
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Do It Yourself
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Constrain the full assembly in design intent:
Fix in-space clamp-pad
Set surface-contact constraints following the picture
Set axial coincidence and points coincidence.
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1. Make flexible one instance of sub-clamp
2. Edit and change numerical value of the offset constraint
Measure the distance to obtain the Close configuration
Load : full-clamp.CATProduct