Hello
I try again to create a K-factor template table
but it doesn't work and I don't see where the problem comes from.
I would need your enlightenment please.
facteur_k_test.zip
facteur_k_test.zip
Personally, I work with the K factor but my size table.
I set it to 0.33 in general because I use appropriate tools.
Except for crushed folds where I put 0.5
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I also use the K factor without a table, but sometimes I forget to change the value, and as a result I end up with wrong parts in Prod.
So I'm looking for a way to avoid this kind of problem. :-)
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Oh yes, in this case, you have to make a table but not a template table.
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I advise you to take a table model in Soldiworks/lang/english/sheetmetal bend tables.
And modify it as you wish.
Is that what you did?
kfactor_base_bend_table.xls
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Hello
I put a K at 0.01 for all thicknesses up to 8mm (sum of interior lengths = developed). After that, there is loss in the folds.
Be careful with the rolled parts where K=0.5 .
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No, I used this table as a base.
C:\Program Files\SolidWorks Corp\SolidWorks\lang\French\Sheet Metal Gauge Tables\k-factor mm sample.xls
k-factor_mm_sample.xls
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0.01 ?!!!
Where do you find that? :p
What kind of tools do you use to achieve this result?
After many tests, I finally started folding with the K factor.
That's what gave me the best result, and the best accuracy.
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0.01 means Interior Neutral Fiber Rating, that's all! Our tools are normal!
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Like Bart, factor k=0.33.
@david be3: for my crop, what is the inner neutral fiber? I know the neutral fiber, but not the other one. Thank you.
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To make it simpler:
K-factor = Ri/ep
If the result is approximately equal to 1: K=0.33
If the result is approximately equal to 2: K=0.4
If the result is approximately equal to 3: K=0.5
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Thank you Bart for the formulas that make your head hurt!
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That's why I simplified below =)
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On a sheet thickness, the neutral fiber is the line that does not deform during any bending or deformation operation.
On SW when K=0.001 it means that the neutral fiber is almost on the bent side,
when K=1 the neutral fiber is on the other side of the thickness .
When K=0.5 the neutral fiber passes through the center of the thickness!
In the workshop and with the majority of my subcontractors, the developments are done inter odds!
See PJ
sw_010.jpg
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It all depends on the desired tolerance, the thickness and the tooling chosen.
Edit: looking at your drawing, we can see that if you put 0.01 in K factor, you lose precision.
On a 2mm sheet metal it can still play a role.
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On a 2mm sheet metal which when you receive it is 1.95 and 2.25 mm! At this level, personally, these parameters suit me very well!
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I agree with you David. For an angle iron, it's very good, we're not a watchmaker either, but on a sheet metal with a multitude of plies, it can be a problem...
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We're off topic in fact here...
What does your table look like in the end Romux?
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