Roller Die, Flat Pattern 1

[Tomasreabe]

Hello,

I am trying to figure out a way to do this one way or the other.

I have a roller die that has some complex geometry on it, I am trying to find a way to model the die and produce a flat pattern of the die as well.

I currently need to build a full model of the die as if I unrolled it off the axel, as well as a model of the die.

The program does not model the die correctly when rapped around the axel so the flat model is needed to show drawing views.

I am trying to take a rubber stamp and rap it around an axel is the best example I can give.

If the program will model the rolled die correctly then I would not need the flat model but I would still require the flat pattern.

Any help in this would be great; I would try to do what is needed to have a correct model.

Thanks

 

[onefjef]

Try this,

1. Develop axle, mine was 4" diam. bar.
2. Create a parrallel plane sketch that is tangent to the bars outside surface. On this sketch draw your "stamped" shapes as they would be stretched out, or how they would appear if rolled out.
3. On surfacing toolbar strip pick the wrap sketch command. Pick outside surface of axle/cylinder. Then pick the tangent sketch as the features to wrap.
4. Now shapes should be on the cylinder surface.
5. Choose the Normal Cutout command and pick the cylinder surface. Pick the wrapped sketch elements. You can pick either side of the skech elements.

Further if you wanted to actually see the axle rolled out you could:
6. Cutout the inside of the axle so the wall thickness corresponds to a sheet metal thickness in the library.
7. Cutout a open seam down the cylinder.
8. Open new sheet metal document.
9. Part copy the axle part file into sheet metal file.
10. Convert to sheet metal command.
11. Flatten model application on Applications menu.

 

[onefjef]

Axle:



Flattened:

 

[Tomasreabe]

Thank You Onefjef
But this works for simple patterns and this is what I have been doing.

I need to have a knife like edge on the end of the die.

so I have walls that need to come up with uniform thickness that then have a triangular top to give me the cutting profile. so this makes a 3d part that woulld need to be warped to fit around it's axel.

Agian Thanks

I will try to get Pictures of what I am working with.

 

[Tomasreabe]

Here are the Pictures

Flat

https://mywebspace.wisc.edu/reabe/web/DieFlat.jpg

Round

https://mywebspace.wisc.edu/reabe/web/DieRoll.jpg

 

[onefjef]

I assume you have tried the chamfer command with results not what you wanted. Sorry I couldn't help.

jef

 

[Tomasreabe]

Yep, I am looking to have the profile of the knife to be the same through out. If I use the normal cut the blade base will be thinner than the top. The closest that I have gotten is using the swept protrusion. So modeling the part is being a pain, yet having to find a way to have a linked flat pattern.

Thanks

 

[chenwei]

Hello,

If you use SE V18 or later, you can Wrapup the Sketch to the cylinder surface, then make the boss with "Normal Protrusion" command. Then you can taper it by Chamfer command with 2-setback option. The workflow is much easier than using the swept protrusion.

I've attached bitmap of the result part in UGS BBS binary section. If you have a webkey, you will be able to access it:

http://bbsnotes.ugs.com/cgi-bin/dne...dge.binaries&item=3849&utag=bzwyms+:304314386

chenwei

 

[donyoung]

Hi,

... but still then you won't be able to flatten it.
As soon as any metal deformations takes place flatten
is impossible. And here there is much of it ...
No CAD will do that except with some additional modules
taht have been bought at $$$$ ...

BTW: NormalCutout as well as NormalProtrusion will
result in a conical shape. The direction will point
always to the centerpoint of the curve involved.
You may think of a line perpendicular to the tangent
put through the point on the curve


dy

 

[Tomasreabe]

Donyoung Said,
"No CAD will do that except with some additional modules
taht have been bought at $$$$ ..."

What or where would I look if I wanted to find one of these modules. It might be something that would be worth the price.

Thanks

 

[donyoung]

Hi,

you may first check out the UGS Voyager partners. Otherwise
I can only remember: 'Fastform advanced' and 'Fastblank'
check google on these I've no site address

dy

 

[Tomasreabe]

In order to build a proper Roll I needed to use Rolled Sketches, with swept surfaces, Stitched together. This built the roll for me but is there a way to then take the roll and shave off the outer layer, flatten it, and stretch it to build a flat pattern. Or have the part saved as a Para solid plotted in cylindrical coordinates, which you would map as if Cartesian coordinates to build a flat pattern.

We want to have a roll that is built accurately while still being able to have a linked flat pattern.

We would be looking for third party software if they would be able to help us.

Thanks TRR

 

[donyoung]

Hi,

[cite]
This built the roll for me but is there a way to then take the roll and shave off the outer layer, flatten it, and stretch it to build a flat pattern
[/cite]

when the part is constructed by using the ContourFlange then
this should be possible by leaving out the pattern

- enter the FlatPattern environment, but do start the
flatten yet.

- use 'Modify' --> Delete Faces from the ToolBar
when it's not shown click into the empty space on
top of the window --> RMB -> checkmark 'Modify'

- select 'Feature' from the pull down
- select the Feature single(!) (best within the EdgeBar)
- click on the green checkmark button
Finish

- repeat for the (circular) pattern if any

Cancel

- now select 'Flatten' from the ToolBar and proceed as usual

HTH

dy

 

[donyoung]

/Edit

enter the FlatPattern environment, but do start the flatten yet.

should have read: but do NOT start the ...

sorry for that

dy