problem with inventor developments

[HAKIM]

Good morning.
I have a serious problem about developments with inventor. I'm just using inventor and I'm not very practical. the developments of the sheet are abundant to me. How do I do to have the right development to have the right odds on the real piece?
do I change the k factor according to the material and thickness? If so, how do I do it? Do I have to make any formula to add in the program?
Thank you.

 

[Matteo Cappelli dis.CAD]

Hi.
of managing everything with sheet rules (default values icon) creating styles with various k factors

video:https://www.youtube.com/watch?v=wmrz-nhitso

apps autodesk:https://apps.autodesk.com/invntor/i...or&facet=&collection=&sort=&query=sheet+metal

 

[HAKIM]

Hello, matteo,
Thank you for the answer.
exists a table to be inserted on inventor as parameters to be used on each material and thickness?
Thank you.
- - - updated - - - -

Hi.
of managing everything with sheet rules (default values icon) creating styles with various k factors

video:https://www.youtube.com/watch?v=wmrz-nhitso

apps autodesk:https://apps.autodesk.com/invntor/i...or&facet=&collection=&sort=&query=sheet+metal

Hello, matteo,
Thank you for the answer.
exists a table to be inserted on inventor as parameters to be used on each material and thickness?
Thank you.

 

[Matteo Cappelli dis.CAD]

Hi.
by default no;
if you use the k factor, you must associate to each thickness style a k factor value
I, according to my bending machine use for thicknesses up to 3mm the factor k=0,274 which "cuts" the thickness fold
example a sheet "l" 30x30 to 90° thickness 2mm, generates a development of 28+28mm

if you use larger thicknesses, I use the standard k factor of inventor k=0,440

allego pdf with "k factor theory"

you can then create styles for each thickness

 

[HAKIM]

Hi.
by default no;
if you use the k factor, you must associate to each thickness style a k factor value
I, according to my bending machine use for thicknesses up to 3mm the factor k=0,274 which "cuts" the thickness fold
example a sheet "l" 30x30 to 90° thickness 2mm, generates a development of 28+28mm

if you use larger thicknesses, I use the standard k factor of inventor k=0,440

allego pdf with "k factor theory"

you can then create styles for each thickness

Thank you matteo

 

[Creative Soio Studio]

the question of sheet metal development can be seen in a very simplified manner.
Let us talk about it in this article if it can be useful.

CALCOLO TEORICO SVILUPPO LAMIERA

Come si effettua il calcolo teorico dello sviluppo della lamiera?Un semplice esempio per comprenderne a fondo il significato.

www.creativesoiostudio.com

 

[windreef]

the k factor depends on the material and of course on the thickness and radius of the peel, but also on the bending machine that is used , you have to do bend tests to determine the k factor, normally it is who bends the sheets that tells you the k factor to use for its machine based on thickness and material.
for thicknesses up to 20/10 and radius 1 mm you can use 0.28 if you don't need an excellent accuracy, for greater thickness you need to do tests (or ask the bending machine better) because differences can also be remarkable.

 

[Cast16]

for better results you should draw using the real fold radius. each punch-matrix-material-thick combination can generate a different fold radius. Many times it is wrong to consider the punzone radius as an actual fold radius. then in the fold should be annotate which punch and matrix to use. a long workflow that not always, not all do

 

[MassiVonWeizen]

for better results you should draw using the real fold radius.

I'd say it's very important. you also have to pay close attention to imported files that almost certainly do not have the correct radius.
when I started making developments of sheet metal, a few years ago, I mistaken several before I realized that I applied factor k with a certain radius when the client who had passed the file had used a different radius.
Now the first thing I do about the details to bend is to change the radius.

 

[windreef]

for better results you should draw using the real fold radius. each punch-matrix-material-thick combination can generate a different fold radius. Many times it is wrong to consider the punzone radius as an actual fold radius. then in the fold should be annotate which punch and matrix to use. a long workflow that not always, not all do

I agree in full. I assumed that obviously the fold radius must be real otherwise.... but you did very well punctualized.