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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5/50Copyright DASSAULT SYSTEMES 2002 5

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



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



And now practice in the context of the Connector Assembly




1


using constraints.

2


3

4



Pattern the Screw.

5



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



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



And Now Practice in the Context Of the Connector Assembly

Create and name the assembly,

insert components, duplicate the

shell , assign Instance Names ,


1


using constraints.

2


3

4



Pattern the Screw.

5



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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Create and name the assembly,

insert components, duplicate the

shell , assign Instance Names ,


1


using constraints.

2


3

4


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



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1Position the components

using constraints.

2


3

4



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.




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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


To avoid looking for the correct folder

where the inserted components are

stored, begin a Save as with the

loaded Document , then Cancel it.



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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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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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( )

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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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


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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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




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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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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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Do It Yourself


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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

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