Autodesk Tutorial for Loft

8/2/2019 Autodesk Tutorial for Loft

1/26


2/26

Tutorial 14 Multi-body and Mold Tooling JD Mather 2

Create a folder called Vacuum Tooling and then create a project (ipj) with the same name in that

folder.

. Send me an email

for the example file used in this tutorial. When you open the file you will get a Resolve Link to resolve

the link to two image files. I embedded these images in the file - so simply click Skip All.


3/26


Turn off the visibility of the Side Layout sketch and drag the red End of Part (hereafter EOP) just below

the Back Profile sketch.

Start the Loft command and select Click to add in the Rails window. Select the 4 rails starting with the

Bottom Rail and going counterclockwise in the selection order (so that we all do it the same).

Click to add in the Sections window and select the front and back profiles.


4/26


Select the Thicken/Offset

command and change the

output to Surfaces. Offset

the outside of the loft featureto 2.2 towards the inside of

the part. Turn off the

Visibility of this surface we

wont need till later.

Start another Loft and select the face of the solid shown and the Origin Center Point.


5/26


On the Conditions tab set to

Tangent and a Weight of 2.5 at

the point.

Drag the EOP down below Handle Profile and Sweep the Handle Profile along the Handle Curve sketch as

a surface.


6/26


Drag the EOP below the Clearance Profile and Sweep the Clearance Profile along the Clearance Curve

sketch as a Surface.

Select the Sculpt tool and the two swept surfaces. Select the option for Remove and make sure the area

shown is highlighted red (you might need to flip direction arrows).


7/26


On the Plastic Part tab select Rule Fillet and select the cut Sculpt feature as shown. Radius is 10mm for

All Edges.

Drag down the EOP below Nose Split and Extrude the spline as a Surface mid-plane 300mm.


8/26


Thicken/Offset as a Surface the previous surface towards the front of the vacuum a distance of 20mm.

Turn off the visibility of the Solid Bodies and turn on the visibility of the first Thicken/Offset surface that

we made. (Tip: We made this surface while it was in its simplest untrimmed state. If we had offset

later in the history it would have been a trimmed surface of more complexity.)


9/26


Select the Trim Surface tool and trim away the front of the surface shown. Read through all of the next

few steps before continuing.

Select the Trim Surface tool and trim away the back of the surface shown leaving the loop between the

two surfaces.


10/26


This trim is a little trickier. Select the

remaining trimmed loop surface as the

Cutting Tool and then Remove the

outside of the offset surface as shown.

For the final trim once again

select the trimmed loop surface

as the Cutting Tool and this time

select the inside hole face of

the Extruded surface.


11/26


Stitch the 3 trimmed

surfaces together into one

surface.

Here is a look at the Stitched surface with Translucency

turned off. (Note: I have had some students have

trouble stitchingif it wont stitch undo the trims and

trim in a different order.)This surface will be used for a

complex split between solids. Turn the Solid body

visibility back on.


12/26


Use the stitched surface as a Split Tool and select the option for Split Solid. This will give us two solid

bodies. Turn off the visibility of the stitched surface.

Turn off the front solid

and Shell the back solid

removing the face

shown. Set the

Thickness to 2 mm.

(Tip: Remember earlier

we offset the first

surface to 2.2mm. This

will give us some

clearance between

parts.)


13/26


Turn on the visibility of the XY Plane. Do another Split using the XY Plane as the Split tool, this time you

will need to select the back half solid as the solid to split. You now have 3 Solid Bodies in the file. Turn

off the visibility of the workplane.

Turn off the visibility of the two

back handle solids and turn on

the visibility of the front nose

solid. Shell to 2mm Thickness

removing the 3 faces shown(one face on front other side

from view).


14/26


Drag the EOP down below the Grill sketch and then select Grill from the Plastic Part tab. Select the

boundary and set the dimensions as shown.

Select the Island

tab and select the

circle shown.


15/26


Select the Rib tab and then

select the three arcs in the

sketch as ribs. Set the

dimensions as shown. Notice

that by expanding the dialog

box you can see the resulting

Flow Area.

Mirror the

Grill feature

to the other

solid using

the XY Plane.

Note that you

have to

explicitly

select the

other solid.


16/26


Pull the EOP down

to show the Boss

Sketch. From the

Plastic Part toolsselect Boss and

make the changes

shown on the Ribs

tab.

Right mouse click

on the Boss Sketch

and select Share

Sketch.

Change the output

to the threaded

side and select OK.

Save the file.


17/26


In the Solid Bodies folder at the top of the browser rename the 3 solid bodies as shown.

From the Manage tab

select Make Part andselect the Handle-Left

(we could select Make

Components, but we will

concentrate on only this

one part).


18/26


Double check your Project if you didnt set it earlier. With the Vacuum project active click on the edit

Content Center Libraries icon lower right corner of the dialog box. Make sure the Mold libraries are

loaded in your project.

Start a new Mold Design.iam file. Save it with the name

Handle-Left Mold.iam.


19/26


Place Plastic Part and then click Adjust Orientation to make sure the opening direction is as shown.

Select Material and select OK to whatever the default material is (or change it if you like we can

change it at any time.)

Set the Gate Location to

the corner as shown

(We can change the

location later.) Apply

and Done. Click Part

Process Settings and

select OK to the

defaults (we can change

these later). We will

not run Fill Analysis or

Part Shrinkage at this

time (we can run those

later).


20/26


Select Define Workpiece Setting and accept the default size. (We can change that later. Get the idea,

we can edit all of this stuff as needed.)

Create Patching Surface by selecting the automatic creation. Inventor patches all of the holes except for

the Grill feature holes.


21/26


Select Create Patching Surface again and this time instead of Automatic creation select Click to Add and

select boundaries of one of the openings in the Grill. (It might be easiest to follow this tutorial if you set

the Visual Style to show edges.) Notice that the patch isnt created. We will have to try something else.

Cancel the operation.

In the browser right click on Handle-Left and select Edit

Component. (Very Important Note: This is not the

Handle-Left file we created earlier. This is a Derived

Component created by Inventor Tooling to compensate

for part Shrinkage.) It took me a while to figure this outas I was trying to edit the original file that I still had open.

The next few steps will only work on the Tooling derived

plastic part.

Delete Face with the Heal option the inside face of

the grill. Notice that with edge display turned on

that all of the edge lines between the grill and the

curved face are removed. This is now one face.

Click Return in the upper right corner of the

screen to return to the assembly.


22/26


Note the difference between this image and the previous

image.

Click to add and select the boundaries for the patches (you

need to Click to add after each boundary). I have had trouble

with some boundaries not creating patchesso Im going to

show another technique for the boundary I left open. (If you

try to create a patch and it fails you can select the patch in the

list and then hit Delete on the keyboard.) Select OK for the

patches we created.

Right click on the

plastic part in the

browser and

select Edit Part

again. Start the

Boundary Patch

command and

select the

boundary. Select

OK and Return to

get back to the

assembly.


23/26


Select Use Existing Surface and

select the Boundary Patch we

just created. Make sure the

Output is on Patching Surface.This will convert our Boundary

Patch to a Patching Surface.

Select the Create Runoff

Surface and select the

automatic creation icon.

Click OK.


24/26


From the pull-down under Extrude Runoff Surface select Radiate Runoff

Surface.

Select the edge shown.

Note the direction of X and Y axis.

Note the Start Point is filled.

Change the Start to Y Direction and flip the arrow as shown.

Click Apply.


25/26


Repeat for the other

side. Click Apply.

Repeat for the remaining two runoff surfaces.


26/26

Select the Generate Core and Cavity and OK.

The original model for this tutorial was from a tutorial supplied by M2 Technologies.

http://www.m2t.com/

The original tutorial was adapted to update for multi-body solids and Inventor Tooling functionality.

JD Mather

[email protected]
http://www.m2t.com/http://www.m2t.com/http://www.m2t.com/

Autodesk Tutorial for Loft

Documents

Transcript of Autodesk Tutorial for Loft