Bending Area Tables

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1

  Hello

 

In order to perfect my plans and the precision of the sheet metal parts in the workshop, I would like to work with a table of bend zones in loss at the bend.

 

So I have a table filled to 100% according to the chart of the different machines.

2 concerns arise:

 

- The tables have angles, but not necessarily the ones I use (I have pieces with for example angles of 92.36°)

  How to get Solidworks to consider all angles

 

- In the table I have positive and negative values, how do I enter the positive values?

 

Thank you =)

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2

It seems to me that SW automatically interpolates between 2 known values.

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3

Hi @ Bart

It seems to me that for solidworks the angles are defined from 0 to 360°

then for your angles the proportional rules must work

See these tutorials

http://www.lynkoa.com/store/fr/tolerie-methodes-de-calcul-de-developpes.html

tutorial on sheet metal tables

https://www.youtube.com/watch?v=d068bXXRsU8

http://www.leguide3d.com/profiles/blogs/solidworkq-comprendre-le-fonctionnement-des-tables-en-tolerie

Here is already the beginning of a walkthrough

@+

 

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4

I enclose my calculation table.

 

If I put a fold that is not in this table, Sw puts an error in the unfolded and does not unfold...

 

SW tells me that the corners are outside the bending table. (Logic)

But I can't see myself filling line by line 96.3° 96.4 ° 96.5° 96.51° 96.52°

Etc......

 

In all the tutorials, the problem is never addressed, everyone works with the angles that are in the table. It works for standard angles, but as soon as you make a different part, it is a problem.

 

So, I have to switch to K-factor, but it changes the accuracy...


calcul_perte_au_plis.xls
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5

I've already read all the tutorials about folding tables.

 

Browsing all the youtube pages, all the forum pages, we NEVER talk about the angles that are outside the table....

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6

Hi Bart,

We had the same problem, as soon as there is an angle with decimals it gets stuck. Since then we have been working with the Ka factor and never had a problem again....

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7

I don't think that the 100° of degree changes the bending length much

especially on thin thickness and radius

make a micron fold in sheet metal you have to be swept

@+

8

Hello

Here is a link for an example of a template and bend loss table

http://www.lynkoa.com/forum/3d/perte-au-pli-et-facteur-k-avec-une-plieuse-cn-amada

In the table we go from 5° to 5° and solidworks interpolates well between 2 values, does an essa with these 2 tables and if it works modify them to your liking.

From 5° to 5° the loss at the crease is precise enough not to be annoyed.

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9

Thanks sba, I'll look into it.

 

I also use the K factor in most cases.

 

But for a piece in 40/10 or even + with a dozen successive folds, I can assure you that you wouldn't be good if you don't get as close as possible to reality...

 

I just wish I could have the complete table that works with all kinds of folds. =)

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10

I looked at your table for steel.

 

On the other hand, comparing with mine, I see differences of + 2mm... Are you sure of your table?

 

I'm going to throw some test pieces, we'll see^^

11

I looked at my fold loss table again and I think I've solved my problem...

 

Just add a line with a 0° angle and the table works perfectly =)

If you are making crushed folds, add a column with the correct bend radius. 0.05mm it seems to me.

That's it =)

 

 

 

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