factor k for development channels to u

[triplix]

Perhaps the title is not clear, I design canals in sheet that form u with a top edge folded to the ester and I have serious problems with factor k.
so far with autocad I have always calculated the developments of the channels with "paper and pen" but now with inventor it is difficult to me.
I set a k factor value with which I can perform the folds at 90° as I want, but when it comes to performing a cradle at u (background folded as if it were half round tube) with vertical walls and a upper lip coming out with a 90° fold do not return the accounts.
My bottom to u is similar to half a calandered tube so inventor "wans" some kind of factor k and my edges folded to 90° require another one!
Is there someone who has already had a similar problem and managed to solve it?

Thank you.
Palo

 

[meccanicamg]

use folding table. to change the radius also changes k because changes the incrudiment line of the material.

 

[triplix]

use folding table. to change the radius also changes k because changes the incrudiment line of the material.

thanks, I solved by giving a rule for folds from 0 to 180° with factor k 0.293 and a rule for folds with radius greater than 20 up to 200 with factor k 0.5 .cosi seems to work.

Palo

 

[Tarkus]

so you answered the same question you had put in the previous discussion of christian76. :finger:
can you post an example of how you set the rule?

 

[triplix]

Monday place example design and formulas set.

 

[triplix]

annex there is an example of what we build and for which it served this rule.
are coclee channels, which are our production.
I created a "table folds sp.3" by setting 2 custom equations as attached, in which insert a k factor for the folds and one for the rolling, then I set a sheet rule for the 3mm and as an explanation rule imposed a "table folds sp.3 that you created before.
Obviously you have to set for each thickness a sheet rule with a phieghe table with k factor calculated for that thickness.
I hope I've been clear

Palo

 

[Tarkus]

annex there is an example of what we build and for which it served this rule.
are coclee channels, which are our production.
I created a "table folds sp.3" by setting 2 custom equations as attached, in which insert a k factor for the folds and one for the rolling, then I set a sheet rule for the 3mm and as an explanation rule imposed a "table folds sp.3 that you created before.
Obviously you have to set for each thickness a sheet rule with a phieghe table with k factor calculated for that thickness.
I hope I've been clear

Palo

I don't see the equations. .

 

[triplix]

ops!!!
rimediato :finger:

 

[Tarkus]

It's not like he understands us a lot, so I'm asking for advice:redface:
as it is set (always that you can) a sheet rule where the k factor is equal to 0.273 for internal rays from 0 to 10*spessore, and is equal to 0.5 for internal rays over 20*spessore.
this, because I'm hardly going to be bending a radius of 30 on a sheet of 3 mm; While it's certain that if I need such a wide radius, I'll use the grille and then factork= 0.5...

 

[triplix]

What is not clear? Pasted image or explanation?

Anyway, I think what you need is something like this:

create your own custom fold table where you set:
explanation method=custom equation
type of equation= factor k
angular reference=what you need, I set opening angle

create a line in the table below
in the custom equation column double click and type your 0.273 value and in the encumbrance condition column double click and type us 0< p < 10 (i.e. p is the radius value as you see in the legend)

I don't understand what your " *spessore " means

create another row and impose k value as 0.5 and as encumbrance condition put 20< p < maximum value to which you could get

with these two equations but you have a hole for the inner rays ranging from 10 to 20

I hope it's clear otherwise I'm here. :finger:

Palo

 

[Peppe]

What is not clear? Pasted image or explanation?

Anyway, I think what you need is something like this:

create your own custom fold table where you set:
explanation method=custom equation
type of equation= factor k
angular reference=what you need, I set opening angle

create a line in the table below
in the custom equation column double click and type your 0.273 value and in the encumbrance condition column double click and type us 0< p < 10 (i.e. p is the radius value as you see in the legend)

I don't understand what your " *spessore " means

create another row and impose k value as 0.5 and as encumbrance condition put 20< p < maximum value to which you could get

with these two equations but you have a hole for the inner rays ranging from 10 to 20

I hope it's clear otherwise I'm here. :finger:

Palo

I thank you for the fantastic tip:finger::finger::finger:

 

[triplix]

I thank you for the fantastic tip:finger::finger::finger:

Come on! That's why we're here! :finger:
I'm glad to be helpful

Palo

 

[Tarkus]

What is not clear? Pasted image or explanation?

I just don't know how to do it.

Anyway, I think what you need is something like this:

create your own custom fold table where you set:
explanation method=custom equation
type of equation= factor k
angular reference=what you need, I set opening angle

create a line in the table below
in the custom equation column double click and type your 0.273 value and in the encumbrance condition column double click and type us 0< p < 10 (i.e. p is the radius value as you see in the legend)

I don't understand what your " *spessore " means

means that the k value must be taken for rays less than 10 times the thickness i.e. up to 30 radius if I have a 3 mm sheet

create another row and impose k value as 0.5 and as encumbrance condition put 20< p < maximum value to which you could get

with these two equations but you have a hole for the inner rays ranging from 10 to 20

Palo

if the feature accepts the first formula= 0< p < 10* thicker and the second formula = 10* thicker< p < 100000* thicker (to have an infinite value), I should not have a hole...

 

[Tarkus]

tried with a profile like the cochlea cradle.
It works!:biggrin:
thanks to the right

 

[triplix]

tried with a profile like the cochlea cradle.
It works!:biggrin:
thanks to the right

:finger:
paolo