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
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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Unfortunately it doesn't give much hihi.
I need to enter these values in a table but when I do, it doesn't work (I always use a 1mm radius when I draw to simplify the thing).
At worst, I will ask my boss for a day of sheet metal training.
:-)
facteur_k.xlsx
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If it's just to change the K factor according to the thickness, I may have a solution that could work.
If you are under 2014, there is a new function that allows you to set the K factor according to a configuration.
All you have to do is create a document template with the different configurations (ep = 1 ep = 2 etc....)
And to link the K factor to the thickness. (See image) same for the bending radius.
To try. =)
config.png
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Thank you Bart, I'll try your solution. She seems not bad to me at all^^
Watch this tutorial video
https://www.youtube.com/watch?feature=player_embedded&v=d068bXXRsU8
@+ ;-))