how to model a sheet metal cone

Anonymous · ‎03-08-2007

I am having a hard time trying to figure out how I can model a .02" thk cone. I need it to be of two piece construction that overlap and then will get riveted.............

I also need the flat pattern and this is why it needs to be a sheet metal part.

Any ideas????? I am using Inv 11

JDMather · ‎03-08-2007

Can you zip and post what you have so far?

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andrewiv · ‎03-08-2007

You can actually do this with part features. Creat a profile of your sheet metal and then revolve it. You just have to make sure that the thickness of your profile matches the thickness in sheet metal styles.

Andrew In’t Veld
Designer

Anonymous · ‎03-08-2007

wrote in message news:5512439@discussion.autodesk.com...
>I am having a hard time trying to figure out how I can model a .02" thk cone. I need it
>to be of two piece construction that >overlap and then will get riveted.............

>I also need the flat pattern and this is why it needs to be a sheet metal part.

>Any ideas????? I am using Inv 11

Bit of a nightmare, there was a good cone tutorial for this. But can't find it.

Try the link below
http://groups.google.co.uk/group/autodesk.inventor.support/browse_frm/thread/e8e66b3f9803066d/b611ede7dea14b1e?lnk=st&q=sheet+metal+transition+cone+flat+pattern+inventor&rnum=1&hl=en#b611ede7dea14b1e

And a coil flat pattern
http://www.mcadforums.com/forums/viewtopic.php?t=7481&highlight=sheet+metal

General tips on machine shop patterns.
http://www.thesheetmetalshop.com/index.php?module=htmlpages&func=display&pid=142

Anonymous · ‎03-08-2007

Found the tutorial

http://www.kwikmcad.com/iclips/examples.asp

HTH

Nick

Anonymous · ‎03-08-2007

Thanks all. I think I got it. I forgot about having to make the thickness match the parameter.

I haven't tried to add the holes yet (I have to add rivet holes along the edge). I think I should be able to project the flat and put them in that way.

Anonymous · ‎03-09-2007

il giorno 08/03/2007 21.03 jrodroca ha scritto:

> I haven't tried to add the holes yet (I have to add rivet holes
> along the edge). I think I should be able to project the flat and
> put them in that way.

I think that it's not possible to add holes to a flat pattern, and if
you add them to the cone you'll have non-circular holes in the flat
pattern.

M.

Anonymous · ‎03-09-2007

I thibk that you could use the Emboss command to create holes which will be
circular in the flat pattern.

"MarcoA" wrote in message
news:5513167@discussion.autodesk.com...
il giorno 08/03/2007 21.03 jrodroca ha scritto:

> I haven't tried to add the holes yet (I have to add rivet holes
> along the edge). I think I should be able to project the flat and
> put them in that way.

I think that it's not possible to add holes to a flat pattern, and if
you add them to the cone you'll have non-circular holes in the flat
pattern.

M.

andrewiv · ‎03-09-2007

Yoy will need a flat surface on the part, then project flat pattern, put your holes on the sketch, cut across bend, and it should work just fine.

Andrew In’t Veld
Designer

Anonymous · ‎03-09-2007

Here is what I have. I was able to create the cone. I then extruded a flat of .0005" so I would be able to project the flat. I projected it created my holes in the sketch. When I try to cut across bend it doesn't work. Not sure why???? I thought it would work fine too andrew.

Anonymous · ‎03-09-2007

Udaya, andrew...

these methods *will* result in holes that are circular in the flat, but *will not* output circles to dxf (edit: just checked this in both 10 & 11). What I had to do was to save the sketch with the projected flat and the circles in it to dxf.

-B Message was edited by: rblawson

Anonymous · ‎03-09-2007

jrod -

I played with the cone file, and I can't get cut across bend to work on it at all as a cone, but as a cylinder I can.

it's not elegant, but you can get what you need by saving the flat pattern as a sat, and then opening it and editing the flat.

Anonymous · ‎03-12-2007

il giorno 09/03/2007 19.19 jrodroca ha scritto:

> When I try to cut across bend it doesn't work. Not sure why????

Maybe because the cut doesn't intersect the bend?

M.

Anonymous · ‎03-12-2007

il giorno 09/03/2007 19.19 jrodroca ha scritto:
> Here is what I have.

This is my attempt.
It looks fine, but I think there is some job to be done in order to
let the two halves match in assembly.

M.

Anonymous · ‎04-11-2007

You are correct, segments will result that are most likely arcs and splines.
It is clear that additional capabilities like a 'cut normal' option need to
be implemented to overcome these limitations and produce a perfectly
circular and continuous cut result. In the mean time, by utilizing IV2008
you could apply one of the aforementioned methods to place the cut on the
folded model where you desire and then conduct a clean-up operation within
the new flat pattern environment. A new cut applied directly to the flat
pattern (perhaps in conjunction with an extrude to add back some material)
would give you a perfect circle that would be more dxf and annotation tool
friendly.

Seth

wrote in message news:5513887@discussion.autodesk.com...
Udaya, andrew...

these methods *will* result in holes that are circular in the flat, but
*will not* output circles to dxf (edit: just checked this in both 10 & 11).
What I had to do was to save the sketch with the projected flat and the
circles in it to dxf.

-B

Message was edited by: rblawson