bending radius in relation to sheetmetal thickness

[makeng]

Welcome back to all. I wanted to submit a problem that I have and I didn't find trace in the forum: the fold rays related to the thickness.
Usually proe sets radius=thickness, but it is a technological error since the bending blades usually have radius or 0.8 or 3mm. normally folds with internal radius of 0.8 up to 3 mm thick including , and 3mm internal radius from 3 included up (usually up to 10 mm or max 12mm). I then compute the development I abandoned the calculations and I entrust myself to a folding table of the slaves.
what would be important is not to set all times manually the radius, but to have it default set with those criteria I described earlier. Is that possible?
Thank you.
makeng

 

[DANI-3D]

Hi.
from practical tests carried out in the workshop the best results to calculate the development of the plates that I found came out not considering the internal radius of real fold due to the tool, but assigning a bending radius that corresponds to half the thickness, both for the iron and for the aluminum and for the stainless steel

 

[makeng]

I must dissent . the setting I mentioned (folding table) is the setting that is normally considered by the nc of the bending machines. the way of calculation is too complicated if introduced within a manufacturing reality. from this point of view I found myself much better to give me the parameters of fold slaves (which are empirical data) , then putting them in the blindfold-table of proes. (but also solid edge..). if the standard blades are 0.8 mm or 3 mm radius (inside), it is better to refer to this standard which is the same as used by most carpenters. that is why I would need to "preset" the rays according to the thickness.... .

 

[DANI-3D]

are probably two different methods to get the same result, then there is the coefficient k that fixes everything.
to "preset" the rays according to the thickness would make me comfortable too, as soon as I have a little time I will make two tests, in the meantime we hope that someone will help us.

 

[makeng]

Sure! They are equivalent. The problem is carpenters. I often found myself fighting because each of them saw it differently. set up with the slaves I had no more problems.....if I then had to "fix" some parameter the thing was very simple because I did before the "provines" of fold getting then the correct paraters "dressed on the carpentry pinco pallo".

 

[DANI-3D]

What we want to do is solve with the fold tables?
Since I have never used them, before I venture into an unknown land, I would like to have a straight from those who already use them.
Thank you all.

 

[makeng]

I have been using them for a long time and I have also worked for a precision carpentry. the fundamental difference between the peeling table and the k calculation factors lies in the approach to the problem: the table describes the actual behavior of the material in relaizone also to the matrices and punches used. I think the most important thing is to understand what actually indicates that number that it has as thick input parameters and internal radius. I will try to explain it hoping that then the circle closes with the preset of the radius/thickness....

 

[DANI-3D]

Unfortunately, I don't know the bending tables, but I took a quick look at the online help, and I saw that you can set the bending radius according to the thickness, but by doing so do not appear to video the respective values during the modeling?

 

[makeng]

no, the sense of the table is different. you can set what you want
as an internal radius. you have to set the part as "file" sheet settings by pointing to the pincopallo table you have previously generated. for each blindfold or wall that draws, the system goes to check if there is the parameter that corresponds to the diameter and thickness. if there is no computation with the default formulas, if it exists, it takes that as a bending parameter (for example if you set a 1.5 thickness a 0.8mm radius, the slave parameter is 2.4. at that point you will appear the latter in the wall in change.

 

[DANI-3D]

between the parameters that regulate the sheetmetal environment I found this:
smt_dflt_bend_radius allows you to define the default bending radius.
see if you can manage it in the bending table

 

[maxopus]

I know that you can also use conditional relationships, as well as you can use start_part with defined fold parameters.

 

[DANI-3D]

not only, I just found out that going to:
change>Settings smt_dflt_bend_radius can be set to thickness/2 percui I have achieved my purpose, and set it in the start_part, all new sheet metal parts will take the right value of the fold radius.

the wonderful thing about this forum is that following the various discussions, every day we improve our way of working.

 

[makeng]

That's what I thought. There should be a conditional relatiumpne that according to the thickness of the part that has generated, proposes a specific radius.... but it is too for me . I do not understand where and how to set such conditional. think that this little thing is a source of trouble with carpenters. I've got to set all the rays by hand, if I run out of the whole development. and those carpenters wonder why they immediately notice! If we can get to this is a spectacular thing.... thank you anyway

 

[maxopus]

That's what I thought. There should be a conditional relatiumpne that according to the thickness of the part that has generated, proposes a specific radius.... but it is too for me . I do not understand where and how to set such conditional. think that this little thing is a source of trouble with carpenters. I've got to set all the rays by hand, if I run out of the whole development. and those carpenters wonder why they immediately notice! If we can get to this is a spectacular thing.... thank you anyway

an example thrown there and definitely improveable.
Suppose you have the usual rectangular piece with 4 equal folds.
Right-click on the sheet conversion function >modifies, in the graphic area go to one of the right-click rays >propriety'
attribute the ray name to the variable.
at this point impose the following relationships of equality between the rays of the other 3 folds and the fold for which you have renamed the size as following example

d363=rage
d364=rage
d365=rage

also renames the thickness quota
At this point, the following report

if thickness < = 2
radius = 0.3
endif
if thickness
radius = 0.8
endif

The report will require a radius of 0.8 mm for thicknesses > 2 and radius 0.3 for thicknesses below or equal to 2.

the thing you can definitely do better but, it is right to make you understand the basic concepts of relationships.

 

[makeng]

Unfortunately it doesn't take much because it assumes that you already have a piece of molded sheet. at this point is faster (if I understand correctly) as I still do: when drawing a folded wall manually imposed the inner fold radius (which by default is = to the thickness, and it is here that I would say it would be appropriate to act) from table.
what would be nice is that the default system offers you a radius of 0.8 for thicknesses up to 3 mm, and from 3mm for higher thicknesses. then there can be cases s the mess, but at that point the tax is manual. so I am sure that all rays are aligned with slave/honored fold standards. keep in mind that with the table system I can manage different materials (different tables) for precision bending even for thicknesses of 6 mm and beyond.

 

[maxopus]

explain yourself better, what doesn't take long.
I think the best way is that of the bending table, with that you definitely get what you want.

 

[makeng]

Okay, I'll explain.
- we start from 0: models for first a flat wall
- choose the thickness and draw the contour
- drawings a new flat fold wall
- the system offers you the internal radius (which I preset = to the thickness)

at this point I would like that what the system proposes to me is related to the thickness as described before (r=0.8 up to 3mm , and r=3 over 3mm thick), so I am sure that the calculation of the unbend is made with the parameter that is indicated in the table that I set (and is connected to the part as a template sheet file)

 

[blubossa]

Okay, I'll explain.
- we start from 0: models for first a flat wall
- choose the thickness and draw the contour
- drawings a new flat fold wall
- the system offers you the internal radius (which I preset = to the thickness)

at this point I would like that what the system proposes to me is related to the thickness as described before (r=0.8 up to 3mm , and r=3 over 3mm thick), so I am sure that the calculation of the unbend is made with the parameter that is indicated in the table that I set (and is connected to the part as a template sheet file)

Bye to all,
I repeat this debate because I now have the same problem

Did someone solve the problem? or are there any other suggestions?

Thank you.
bb

 

[DANI-3D]

Hey, bb,
the problem is solved with the two solutions that have emerged:
1) with the relationships change the bending radius of each individual fold according to the thickness.

2) bending radius = thickness/2.

In both cases, the k factor needs to be adjusted to ensure that the development is correct to vary thickness or material

 

[blubossa]

Hey, bb,
the problem is solved with the two solutions that have emerged:
1) with the relationships change the bending radius of each individual fold according to the thickness.

2) bending radius = thickness/2.

In both cases, the k factor needs to be adjusted to ensure that the development is correct to vary thickness or material

I need for thicknesses from
1 to 2.5 ret = 1
3 to 4 ret = 1.6
5 to 6 ret = 2

I would like that automatically depending on the thickness of the sheet to load itself.

having to do it by hand means going on every fold to insert id of the radius in relationships...with the risk of jumping something.. .

as to the factor k I do not know where to fix it

bb