table factor k

[HAKIM]

Good morning.
I would need a K factor table for various materials (especially iron, stainless steel and aluminum) and thicknesses to be used on inventor.
I also need to know how to save a rule by changing the k factor, because when I change it and reopen inventor, I no longer find it.
Thank you.

 

[Matteo Cappelli dis.CAD]

Hi.

once set you have to save everything in general styles
the thing works if your current project set the option "freestyles" in reading - writing
this allows you to activate the option (after offing the nuofo factor k) , to save in the style library so it will be activated both in the new files and the previous onesother solution, is to have the starting model of the sheet (file - new - sheet.ipt) with inside the k factor previously saved

allego pdf on factor k

Good job

 

[Benaz82]

the k factor is based on the quarries and the punch that is then used in the workshop with the bending machine.
rightly it is theoretically calculated with the formula that matteo shared.
where I work, I have a series of k coefficients based on the various thicknesses, materials and caves that will then use my folder colleague.
I make an example: if we have a l of sheet that has with measures 20x20 external measures, it is not possible to use a 35 mm quarry to perform the piece but we should use a 25 or a 20 of quarry (horse not suitable for this material, but necessary to perform the piece). if for the k factor for a 35 with 5 mm thick iron is 0.4 (sovrametal 1 mm), with a 20 the k factor will change as it will change the overmetal to add (sovrametall mm).
Therefore my advice is to perform tests in the workshop and to transcribe the various k factors according to the punches and caves you have available.

 

[Matteo Cappelli dis.CAD]

Hi.
You are perfectly right, my only wanted to be an explanation for the "informatic" setting of inventor

to help what you have rightly reported, I attach the edge of the bending machine, very convenient for the technical mould as it allows to know the caves, the minimum lengths of folds and the "back" of the material according to the various thicknesses
print the annex, cut out and mount

Good job