Wheel 123d Tutorial

of 6 Diane Burton, STEM Outreach. [email protected]

123D Design Tutorial: Alloy wheel or steering wheel

Before using these instructions, it is very helpful to watch this video screencast of the CAD drawing actually being done in the software. Click this link for the video instructions

Start in TOP view, and

select Sketch Circle

Use Sketch Offset to draw another

circle 5mm outside the original circle,

so your sketch looks as below.

Click on the grid to start sketching and

click on one of the large square crosses

for the centre of your circle.

Draw a circle 50mm diameter

You will now start drawing the

spoke sections of the wheel so

that it looks like this

Select Sketch Three Point Arc and click

on your wheel to add to this sketch

Click to specify the start point

2 small squares to the left of

the wheel. Then the end point

make this 2 small squares to

the right of the wheel

Drag the mouse along the arc until the

mouse pointer is one square above the

centre of the circle, then left click once

to fix this point on the arc.


Use Sketch Trim

to remove the

outer bits of the

sketch so it

looks like this

Click on the

same start and

end points to

draw the next

arc so it mirrors

the first arc.

Use Sketch Circle to draw a 10mm

diameter circle in the centre square.

Your drawing should look like this.

Select the point on the arc one

square below the centre of the

circle.

Now start the next arc 2 small

squares above and below the

circle point on the arc, one

square to the side of the centre.

Sketch the final arc

Your drawing will

look like this.


Select Sketch Ellipse and click

in the centre of this section

this will be the centre point

of your ellipse shape.

Select Sketch Trim

and click on the wheel

and begin to trim the

lines you dont need

as shown.

Your finished sketch

will look like this.

Left click one square

along to show the axis

point of the ellipse.

Then drag your mouse to

specify the point on ellipse

you want this to be 2,

type 2 in the box, left click

and press enter.

Use Sketch Ellipse to put

a matching ellipse shape

on the other side

SAVE YOUR

WORK!

Use Sketch Circle to draw 4 circles as shown

This one is 5mm diameter and this one is 4mm diameter. Note where the centre of each circle is.

Your finished sketch should look like this.


SAVE YOUR

WORK!

Select the outer ring and use Construct

Extrude to extrude by 4mm height.

Do the same with the inner part of the

drawing extrude to 4mm height.

Select Modify Fillet and

then click on the outer

ring of the wheel put

4 in the fillet radius

box then press enter.

Select Modify Chamfer

and click on each of the

ellipses put 1.5 in the

chamfer distance box

then press enter.

Select Modify Chamfer

again and select each of

the circle and chamfer

by a distance of 1.


Select the Pattern Mirror tool

Select the wheel as the Solid (it

highlights bright blue when selected).

Click on Mirror Plane and turn the

screen to select the underside of the

wheel.

The shape will mirror to produce a

duplicate shape press enter to finish.

Your drawing will

look like this

Add the centre solid piece of the wheel with a rounded top piece

Select Construct Extrude and click on the centre circle sketch -

extrude by 5.5mm.

Remember that you extruded the rest of the wheel by 4mm, so

the centre circle will protrude by 1.5mm (5.5 4 = 1.5).

Use Modify

Fillet to

round off the

centre piece

SAVE YOUR

WORK!

Select Modify Fillet and then left click on each of the inner

spoke edges in turn to select them. Fillet by radius of 1,

then press enter to finish.

Your

drawing

should look

like this.


Rotate the screen to look at the underside of the wheel and you will see there is a hole

(this is because you mirrored the wheel before you extruded the centre circle.

Pull the yellow arrow to extrude by how much

you want. It will be a negative number as you are

extruding downwards.

-4mm will put it flush with the rest of the wheel,

-2mm will leave an indent, whereas more than

More than -4mm will leave a protruding

cylinder that could be an axle or steering

column.

You can extrude this

centre piece now by

selecting Construct

Extrude and clicking

on the centre circle.

Click the drop down on the top left of

your screen and select Export STL

SAVE YOUR

WORK!

Wheel 123d Tutorial

Documents

Transcript of Wheel 123d Tutorial