exploitation of open plates

[Biggmetals]

Good morning colleagues,
today strangely solidworks chose not to consider the open fold angle, but, to see each fold as a 90°.

normally once I opened a solid, it was enough to change the parameters of the fold radius and its bending table to find the correct (almost always) development of each solid.
this morning on a thickness of 1.5mm stainless steel calculated me on an open fold from 135° more than 2mm to pickup bend, result: the piece is shorter than 4mm (yes, on a low thickness, on a 4mm lost even more)

How can I be sure of development? there is way to recognize solidworks that a fold is not from 90° when I press "flattened"

 

[MassiVonWeizen]

make the table, enter the values and read the fold values, maybe quote a fold to verify that it is correct

 

[Biggmetals]

after trial bend back to answer here.

I do not say I have performed numerous tests, but in short: solidworks evaluates me the withdrawal value of a 90° fold even on folds of degrees different from 90° and I do not understand how to detect that a fold is from 30° (instead of 90°)... can be that you kneaded some setting? or is it the normal behavior of the software?

 

[MassiVonWeizen]

I don't understand how to detect a fold from 30°

I don't understand what you mean

do you know the withdrawal/longing of the fold at 90°?
if you calculate the k factor with that and apply it to all development so that even the fold at 30° has the correct withdrawal.
example:
fold withdrawal at 90° with radius 2 on sheet 5mm and 1mm
with the setting bending deduction the 50mm long fold is flattened 49.5 (piega- (ritiro/2))
I will correct the k factor until the development results of that value

 

[Biggmetals]

I understand what you mean but my question is another and I apologize if it was not understood.

solidworks evaluates me the withdrawal value of a 90° fold even on folds of degrees other than 90°

with this I say:

red development --> folds from 90° and solidworks through our folding tables makes it the correct development
blue development --> a 90° fold and any angle other than 90°, in this case solidworks develops the solid as if all folds were 90°.

my question is: does not automatically detect an open fold and therefore a minor development?
(same thing in case of fold greater than 90° to e.g.)

 

[MassiVonWeizen]

what values did you give in the construction of the sheet?
have you set a general k factor or for each fold?
Have you started with sheet metal functions or converted a normal solid?

there are many variables that influence a result

 

[Biggmetals]

what values did you give in the construction of the sheet?

What do you mean? Thickness? fold radius?

have you set a general k factor or for each fold?

a general (and here I stop because evaluating well may be this the "problem")

Have you started with sheet metal functions or converted a normal solid?

sheet metal

 

[MassiVonWeizen]

What do you mean? Thickness? fold radius?

data that influence the withdrawal then radius and bending tolerance

a general (and here I stop because evaluating well may be this the "problem")

as I wrote in post #4 you must deduce it to backwards starting from the known retreat