factor k - coefficient and - sheet metal collection

[andreaf93]

Good morning.
I wanted to know if actually in the calculation phase of the development of a sheet the factor k corresponds to the withdrawal of the sheet, that is:

my supplier suggested that I use this data to calculate the development of a fe360 sheet - s235jr (foot 90°).

pick up sp.lamiera
0 mm 0.5 to 1.2 mm
0.3 mm 1.5 to 2 mm
0.5 mm 2.5 to 3 mm
0,8 mm 4 mm
1 mm 5 to 6 mm

returning to my question the withdrawal specified in the previous table is the value that I have to give to k when I create a fold to 90° of a certain thickness?
(also the k factor coincides with the "coefficient and" that you find on page 6 of the .pdf that I attached? )

Thank you very much.

 

[haga78]

on the 2-6 mm thick ink we use 0.3 for the folds and 0.5 for the rolling.
Yes, it is the "e" coefficient of the file you have attached.
If you can and if you have to be very precise, you should do practical tests.