SolidWorks Tutorial - Part 8 pps

2 Select the Front Plane and make a sketch like in the illustration on the right.. Make sure the left bottom corner of the sketch is at 3.. Click on the left vertical line in the sketch.

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SolidWorks ® Tutorial 8

Bearing Puller

Preparatory Vocational Training

and Advanced Vocational Training

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Bearing Puller

In this tutorial, we will build a bearing puller This product consists of three parts We will learn a few new functions in this tutorial We will also perform a simple analysis on some of the parts

Work plan The first part we will make is the main bridge We will make this according

to the drawing below

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1 Start SolidWorks and open

a new part

2 Select the Front Plane and

make a sketch like in the

illustration on the right

Thesketch consists of four

lines and three dimensions

Make sure the left bottom

corner of the sketch is at

3 Click on the right end of

the upper horizontal

line

4 Put the end of the arc

at about the same

loca-tion as in the drawing

The exact spot is not

relevant at this point

5 Push the <Esc> key to

end the line command

4 Set dimensions for the arc

you have just drawn:

1 Click on ‘Smart

Dimen-sion’ in the

Command-Manager

2 Click on the arc

3 Set the dimension

4 Change the radius of

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5 Make a curved edge

be-tween the arc and the

3 Click on the arc, to the

left of the vertical line

4 Click on the vertical

line, just below the arc

1 Click on the left vertical

line in the sketch

2 Make sure the rotation

angle in the

Property-Manager is set to ‘360

degrees’(a complete

circle)

3 Click on OK

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8 The basic form is ready

We will now remove three

triangles from this body

Select the Top Plane and

create a sketch like in the

illustration on the right

The sketch consists of two

lines emanating from the

origin: one line goes

straight up and the other

runs downwards under an

angle of about 120 degrees

to the first line Both lines

cross the outside edge of

the part

Set the dimension of ‘120

degrees’ between the two

3 Make sure the option

‘Select chain’ is

se-lected

4 Click on one of two

lines in the sketch

You can now see a

pre-view Both lines from the

sketch are copied

5 When the lines are

co-pied in the wrong

di-rection, click on

‘Re-verse’ in the

Property-Manager

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10 Round of the corners

be-tween the two lines

1 Click on Sketch Fillet in

theCommandManager

2 Check to make sure

that the radius is still

5mm (you set this in

step 6 already, and it

should have remained

in SolidWorks)

3 Click on the corners of

both copied lines

4 Click on OK

11 Next, we will make

con-struction lines from the first

two lines we have drawn

1 Select the first line

2 Hold the <Ctrl> key on

your keyboard and

se-lect the second line

3 Check the option ‘For

construction’ in the

PropertyManager

The two lines will now be

displayed as centerlines

Tip! We have also used centerlines in other tutorials These lines are actually

auxiliary lines When you use a sketch to make an extrusion, for example, SolidWorks only uses the ‘real’ lines and not the auxiliary lines

In step 13 you have seen that you can easily change a ‘real line’ (or circle of arc) into an auxiliary line and vice versa For this the option, the ‘For con-struction’ box in the PropertyManager must be checked

12 Next, we will cut a corner

from the model:

1 Click on ‘Features’ in

theCommandManager

2 Click on ‘Extruded Cut’

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13 You can see a small arrow

In the model that indicates

from which side of the

sketch the material will be

removed

1 Make sure these arrows

point outwards Click

on it when you need to

change the direction

2 Click on OK

Tip! In most cases you will use a closed sketch for an ‘Extruded Cut’ In the case

of a circle or a square you will only make a hole in the shape of that sketch

In the last step, we used an open sketch to make an ‘Extruded Cut’ It is handled in the same way except for two differences:

1 An‘Extruded Cut’ with an open sketch will always go through the entire depth of the model (‘Through all’) You cannot set a depth

2 SolidWorks needs to know from which side the material has to be cut away You must pay attention to the little arrow, which indicates the cutting side By the way, you can also change this direction in a closed sketch and cut away the material from the inside or outside of the sketch boundaries

14 For the next features we

need an auxiliary line that

runs through the middle of

the model This axis

con-sists in the model already

but is not visible with the

standard (default) settings

1 Click on the Hide/Show

Items icon

2 Make sure the button

View Temporary Axes

is set

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15 Next, we can copy the part

with the cut three times

around the axis

1 Select the last feature:

‘Extrude1’ in the

Featu-reManager

2 Click on the arrow

be-low‘Linear Pattern’ in

theCommandManager

3 Click on ‘Circular

Pat-tern’

16 1 Select the centerline

that runs through the

middle of the model

2 Change the number of

copies in the

Property-Manager to ‘3’

3 Click on OK

Tip! Notice that in the three last steps we first selected a feature in the

Featu-reManager and then selected the ‘Circular Pattern’ command At this point, SolidWorks ‘understands’ that you want to use this command for the se-lected items and automatically adjusts the settings in the PropertyManager.You can also do this in the reverse order by giving the command first and then selecting the elements in the PropertyManager

SolidWorks does not have a preference for how you do it You will have to find out for yourself the approach that works best for you

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17 We will now make a sketch

on the lower surface of the

model Rotate the model so

you can see the bottom

plane of the part

1 Click on the surface to

2 Set a second point at a

random distance

direct-ly below the origin

19 Draw a circle and a line at

the locations indicated on

the right

The midpoint of the circle

must be on top of the

cen-terline

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20 Make a mirrored image of

this line at the other side of

the centerline

1 Select the centerline

(hold the <Ctrl>-key)

2 Click on ‘Mirror Entities’

in the

CommandMa-nager

21 Now, set the three

dimen-sions you see in the

illu-stration on the right Do

this using Smart Dimension

and change the values

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22 1 Click on ‘Trim Entities’

in the

CommandMa-nager

2 Select the option ‘Trim

to closest’ in the

Pro-pertyManager

23 Next, click on the parts of

the sketch that must be

removed Make sure you

end up with a sketch

simi-lar to the one on the right

Should the dimension of

10mm disappear as a result

of the trimming command,

resize that item by using

Smart Dimension again in

the sketch

24 Click on ‘Features’ in the

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25 You must pay attention to

which direction the material

is removed from because

the sketch is not entirely

closed

1 Make sure the little

ar-row that sets the

direc-tion is pointing inward

2 Click on OK

26 Next, we have to make

some holes

1 Select the plane as

in-dicated in the

illustra-tion

2 Click on ‘Sketch’ in the

CommandManager

3 Click on Circle

27 Rotate the model with

Normal To, and draw two

circles at random positions

like in the drawing on the

right

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28 Use Smart Dimension to set

four dimensions in the

sketch, and change their

values as indicated on the

right

Push the <Esc> key to

close the Smart Dimension

2 Hold the <Ctrl> key

and select the other

1 Select the midpoint of

one of the circles

2 Hold the <Ctrl> key

and select the midpoint

of the other circle

3 Click on ‘Horizontal’ in

thePropertyManager

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31 Click on ‘Features’ in the

CommandManager, and

af-ter that on ‘Extruded Cut’

1 Set the depth to

‘Through All’ in the

PropertyManager

2 Click on OK

32 We must now copy the

holes we just made to the

other ‘legs’

1,2 Select the last two

fea-tures in the

Feature-Manager

3 Select (holding the

<Ctrl> key) the axis

that runs through the

middle of the model

4 Click on the arrow

be-low‘Linear Pattern’ in

theCommandManager

5 Click on ‘Circular

Pat-tern’

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33 1 Set the number of

cop-ies in the

PropertyMa-nager to ‘3’

2 Click on OK

34 Finally, we have to make

the metric thread in the

hole:

Click on ‘Hole Wizard’ in the

CommandManager

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35 Set the following features

in the PropertyManager:

1 The‘Hole Type’ is Tap

2 The‘Size’ is ‘M12’

Check the other settings to

make sure they concur with

the illustration on the right

3 When everything is set

properly, click on

‘Posi-tions’ to place the hole

36 Set the hole on the top

plane of the bridge at a

random position

Actually, you are setting a

pointnow, which will

de-termine the position of the

hole

The point is on the plane,

but unfortunately it is not

possible to put this point in

the midpoint of the plane

To do this, we conduct an

additional step

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37 Push the <Esc> key first

1 Select the point that

you positioned in the

last step

2 Push the <Ctrl> key

and select the axis we

used before for circular

patterns

3 Click on ‘Coincident’ in

thePropertyManager

4 Click on OK

The hole will now shift to

the middle of the plane

38 You can now return to the

‘Hole Wizard’

Click on OK

Tip! When you have to place a hole using the Hole Wizard (steps 36-37), you

are actually making a sketch By putting a point in that sketch, you are tioning the hole

posi-The sketch you are making at this point is not an ordinary sketch, but a 3D sketch In a 3D sketch you do not work in a plane (like in a regular sketch) but in a 3D environment These 3D sketches will only occur in special appli-cations in SolidWorks

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39 The model is now ready

Save it as: bridge.SLDPRT

First, create a new folder,

so you can keep all files

to-gether

40 We would like to have

more information about this

model What does is

weigh? Where is the center

of gravity? Is it strong

enough?

To be able to answer these

kinds of questions, we

must first determine the

kind of material to use to

make the part

2 Select‘Alloy Steel’ as

the desired material

3 Click on OK

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42 We can evaluate the data

now

1 Click on the tab

‘Eva-luate’in the

Com-mandManager

2 Click on ‘Mass

Proper-ties’

43 A menu appears, in which

you can read the data,

in-cluding:

1 The weight of the part

2 The volume

3 The total surface of the

part This could be

im-portant when a part

has to be painted

4 The coordinates of the

point of gravity This is

also displayed as a

coordinate

5 When you have

fi-nished reading the

da-ta, click on Close to

close the window

44 Next we want to know if

the part is strong enough

for our purpose We want

to be able to pull 600kg

(=6000N) To find out if

our part is strong enough

for this, we will use

COS-MOSXpress

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45 COSMOSXpress starts as a

wizard You will be led

through a number of steps

and will get a result at the

end

Click on next in the startup

screen

46 First, you must select the

‘Material’ We already did

this so click on Next

47 We then establish the

‘Re-straint’: the fixed part of

the bridge

Click on Next

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48 1 Select the inside of the

threaded hole in the

model In this

calcula-tion we assume that

this is the plane that is

fixed and cannot move

2 Click on Next

49 When desired, you can add

more fixed planes In this

example we will not do so,

so click on Next

50 We have now reached the

tab where we can set the

‘Load’

Click on Next

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51 You can set the load as a

pressure or as a force

1 Select‘Force’

2 Click on Next

52 1 Select the six holes in

which the arms will be

mounted

2 Click on Next

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53 You must now set the

di-rection of the force

1 Check the option

‘Normal to a reference

plane’ You will set the

force in one direction

with this command

2 Click on ‘Top Plane’ in

theFeatureManager

3 Set the force to ‘6000

N’ (Newton)

4 Check‘Flip Direction’ in

order to let the pink

ar-rows point downward

5 Click on Next

54 You can add more forces in

you like, but we will not do

so in this example Click on

made

Click on Next

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56 Click on ‘Run’.

57 The result of the analysis is

that the lowest factor of

safety is 1.7 The part is

strong enough (read the

2 Click on ‘Show me’

You will see the weak

spots in red now

Tip! The factor of safety (FOS) is a number calculated by COSMOS When the

FOS value is less than 1, the part will collapse when the given forces are applied When the FOS value is more than 1, the model is strong enough, maybe even too strong

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58 Because the calculated FOS

value is 1.7, the

construc-tion of the model is

ob-viously too heavy

You can now decide to

op-timize the design by setting

the FOS value to exactly

‘1’

1 Click on Yes

2 Click on Next

59 We will alter a dimension,

so the FOS value will

the height of the

mod-el Make sure to select

the right dimension! In

the pink selection field

in COSMOSXpress you

can see the selected

dimension is extracted

from‘sketch1’ (the first

sketch you have made

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