Unfolding a complex shape under catia

Out of category
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1

Hello

 

Background: This is sheet metal work

 

Problem:

I master the development of sheet metal work (especially in tube) under solidworks but I encounter limitations.

So I switched to catia because a colleague tells me that this software is capable of doing it.

I want to develop a tube with a circular base but not parallel (this is the last point the most annoying)

I modeled my part (in volume) under catia but I can't get anywhere, I'm not even sure I managed to make the software understand the recognition of this part in sheet metal.

Would anyone be able to transform my piece into sheet metal and then unfold it?

 

Thanks in advance,

 

I put a little picture, just to give you an idea.

 

Thomas


tolerie.jpg
2

Hello

What are some limitations you have encountered with SolidWorks?

Kind regards

3 Likes
3

Hello

 

I don't see the problem under SW.

 

I made a similar piece in sheet metal and the unfolded one works very well.

 

Maybe I'm wrong with the problem?

 

 


capture.jpg
4

Hello

 

With a good method, this sheet can be done in SolidWorks:

    - Either with the "transition fold" sheet metal function but in the case of non-paralleling you will not have the hooking lines

    - Or by creating in volume by cutting an area and transforming into sheet metal thanks to the "insert folds" function. (see file)

 

@+

 


cylinder.sldprt
1 Like
5

That's exactly what I did, "transition crease" function.

6

By the way, I'm saying a stupid thing, in this case there's no need for a hooking line so everything is ok!

7

You can also download examples (SolidWorks) of boilermaking that are out of the ordinary. These components use the transition folds and the crunching method. There are examples of cone/cone intersection, cylinder cone, Y-shaped assemblies etc...

This library is available for free download (registration only) on the myCADservices website:

http://www.mycadservices.com/store/fr/bibliotheques-3d-axemble/chaudronnerie/cao-bib-bibliotheque-exemples-chaudronnerie.html

Kind regards

4 Likes
8

Hello

 

JMSAVOYAT :

Solidworks unfolds without problem but I don't have the fold lines

Jose-accessa : 

Do your two ends correspond to circles? and not a circle at the base and an ellipse at the top?

Coyote :

I can't read your part, I have solidworks 2012 64bits (is this normal?)

 

 

I'll put you all the initial file

9

Excuse me, the formatting wasn't supposed to give that...

 

Hello

 

JM:

Solidworks unfolds without problem but I don't have the fold lines

Jose:

 

Do your two ends correspond to circles? and not a circle at the base and an ellipse at the top?

 

Coyote:

I can't read your part, I have solidworks 2012 64bits (is this normal?)

 

 

I'll put you all the initial file

10

Here is the file


hopper.sldprt
11

Hello

 

I'm in 2013 indeed, try with this one which must still be in 2012.

 

@+


raccordement_circulaire.sldprt
12

I'm also in 2013...

 

Yes yes, it is indeed 2 circles and not a circle and an ellipse.

However, I created an angular plane to make my 2nd circle.

 

Where I don't understand is at the level of the fold lines.

The tube is circular so isn't supposed to have any creases?

 

To finish on the part in PJ (hopper), SW reacts strangely... I think you have to extend the piece to recut it in order to have a clean face (cf: Attachment).

 

 

 

 


tremie_modif.jpg
13

Indeed, if the sketch planes are not parallel, there is no bend line appearing in the unfold.

You will therefore be forced to create them, for this you can download on Lynkoa a tutorial (free) indicating the method of calculating the transition folds:

http://www.lynkoa.com/tutos/t%C3%B4lerie-raccordement-par-transition

I think that's the only solution for you.

Kind regards


pli_de_transition.png
3 Likes
14

Sorry for the delay...

 

So your conclusions are:

  • It is therefore not possible to use it automatically under solidworks
  • Construction required

 

My original question was:

  • I know that solidworks doesn't know how to do it
  • "I was told that Catia would be able to do it on her own"

 

My question now is:

  • Does anyone know if Catia can do it?

 

Thanks in advance

15

Yes catia is able to do it in the workshop

 

Mechanical Design / Sheet Metal Design or Generative Sheet Metal Design

 

you have to create the piece in this workshop

 

then you use the unfold fold function

16

Hello Thomas.

It's a bit far-fetched but it seems to be OK

The file is in V5-6R2012.

 


conical-winding.catpart
17

File attached in R19

Without using PartDesign (much less far-fetched than the previous one).


conical-winding-smd.catpart
18

Hello, concerning your files, I was only able to read the last one, I am in R20.

It seems to me that your section of the inclined plane is not a circle but an ellipse...

It's not a big deal, what I want to know how to do is extract the crease lines, I didn't understand how you do it...

19

Here's what it looks like with circles and drawing (unfolded view)

 


pli-conique-smd-.zip
20

I have received your file.

 

I think I don't explain myself well, I know how to unfold a complex shape, what I want are the crease lines automatically under catia.