Dimensioning a Corner Bend Less Than 90 Degrees

2D plans Layout
1

Good evening

I have a question about sheet metal, and more specifically the rating for bending angles of less than 90 degrees.

I browsed the forum a bit and I came across a topic about the Amada method (see image below).

Amada being a manufacturer of folding machines, I wondered if this method was the only one. I have not found a standard imposing a particular method. Especially since I work under CREO (4.0) and I can't use this method... The definition of folded edges apparently does not allow it.

Is it possible to use the following method (see file Methode02.jpg) dimensioning with respect to the intersections of the outer edges, as for the angles > 90°??

Thank you in advance for your help,


methode02.jpg
2

In my opinion no, and this is logical, imagine for a crushed fold there is never a meeting point! for an almost crushed fold the meeting point would be further and further away if the fold is more and more crushed

1 Like
3

Hello

Okay I see, thank you.

So, has anyone ever managed to get a listing of this type with Creo? ...

I get there with the angles > 90°. But for the angles < 90°, I can't get the tangents. I saw that SolidWorks allows you to define the folded edge in this way, so the dimension in the drawing must be automatic... But I haven't figured out how to do it in Creo.

Thanks in advance

4

Hello

In the drawing, there are no problems to put on the tangent side in Creo 4.

You can force the tangent dimension by selecting the tangency icon.

S.B


pliage.jpg
5

Hello

Thank you for your answer. Yes, for that no problem (taking "Max" for the side of the coast where the arc is selected).

However, if I want to have 300 from the tangent (instead of your 283.608), apart from fumbling little by little on the height of the fold (which is not at all robust as a method), I don't see how to do it...

NB: For the right edge, I managed to do it by adding an automatic "Offset" (see image). However, I can't get it on the height of the fold... and I think I've tried all the options...

I'm interested if anyone has a solution!!

Thanks in advance


image.png
6

You can put a tangency in your sketch if you integrate the radius and dimension relative to your line.

You can even get the dimension in drawing.

For a direct folding function in the sheet metal module, I don't know, I don't use it.

S.B


pliage2.jpg
7

I see... It's still a bit scandalous that there is no way to do this more simply in the sheet metal module with folds.

Especially since the solid passage -- > sheet metal work is done well. But sheet metal --> solid (let's imagine I want to add another sharp fold) transforms the model into a dead solid... So it's not too applicable in practice. I thank you all the same for your help.

 

Sincere greetings.

8

In my last screen, my sketch is in sheet metal module.

No need to change to the solid module.

S.b