development and factor k sheet

[Sergio68]

Hello everyone
Since I didn't find a trace of a file like that on the net, I created it.
to calculate the developments of the folds to 90 degrees and open (for the closed folds I am working on), unfortunately excel with the radiants is not of help.in the first sheet (pieghe 90°)you will have the ability to change the k factor, in the second no, of default is set to 0.5.
I remind you that the rule is "v" of the quarry = 6-8 times the thickness ;-)

I hope it's useful to someone, and I hope I'm not wrong section. . .

p.s.
is very useful if you can not use other dedicated 3d software.

Sergio

 

[Sergio68]

Bye to all,
I have greatly updated the sheet metal development file using a pinch of vba.
I hope it can be useful to someone.
"turn" on excel.
Let me know what you think!
Bye!

 

[cad3d]

the files you uploaded appear damaged, it is necessary to investigate why of this anomaly. I wait for information before proceeding

 

[Sergio68]

the files you uploaded appear damaged, it is necessary to investigate why of this anomaly. I wait for information before proceeding

Hello cad3d,
I unload it without any problem.
Once the compressed file is opened, the excel file must be saved out of the compressed file.
I don't understand where the damage is, if you can tell me what anomaly it is about correcting the file.
Thank you.

 

[cad3d]

I'm sorry.

 

[Max_75it]

hi in the folds at 90 degrees the actual development for classic carpentry molds ( amada, 12mm hollow rollers), is not correct. Usually it should be drawn with the thickness of the sheet (but often does not happen). the development of a 100x100 sp2mm to 90° must be of 196mm with your program comes 198,.. because the default k 0.5 factor is not correct must be imposed the right one. I also created an excel file, (working mainly on 90° folds), which gives back development and k factor to be included in inventor or solidwork programs. inserting the lengths returns the development and factor k, independent from how it is designed up to 10mm thicknesses on omega to 4 and 6 folds. hello and good day.

 

[MassiVonWeizen]

Usually it should be drawn with the thickness of the sheet (but often does not happen). development of a 100x100 sp2mm at 90° must be 196mm with your program comes 198

the fold radius depends on the punch used; doing so equal to thickness is a theoretical practice.
the withdrawal depends on many factors: material, quarry, sting.... so there is no universal k factor, but it must be obtained by deduction by testing

 

[Max_75it]

mine is based on tests made in 30 years of work and I have arrived hundreds and hundreds of misguided designs. Until now they've always gone well, there are companies that send you back the pieces without thinking about it for a moment if something doesn't come back.

 

[Max_75it]

I did not speak of universal factor k but of factor k suitable for classical molds of the.carpenteria and obviously every material differentiates. but once calculated remains such.

 

[MassiVonWeizen]

I meant that each supplier has its own k factors, so say that

development of a 100x100 sp2mm at 90° must be 196mm

is only valid for your company and for those who will use your own equipment.

 

[Max_75it]

but you can be, in the surroundings we are about a 40ine of companies and around we pass the orders.

 

[Sergio68]

Hello, Max
the default k factor is set to 0.5 to avoid an error in the calculation, default is not synonymous with tax, moreover I recommend (if you want to test it) to download the latest version of the file.
then as well explained by The mass factor k depends on several factors.
the file that I attached is not the "big" but a simple help in finding the development easily, without drawing the pieces with a cad 3d.

 

[Max_75it]

Hello, Max
the default k factor is set to 0.5 to avoid an error in the calculation, default is not synonymous with tax, moreover I recommend (if you want to test it) to download the latest version of the file.
then as well explained by The mass factor k depends on several factors.
the file that I attached is not the "big" but a simple help in finding the development easily, without drawing the pieces with a cad 3d.

even mine does this, develops and from the factor k without necessarily passing by a 3d design. for tests done once found based on the material the value does not change, can vary the more or less tons. Good evening.

 

[biz]

it is used the method adp.

Metodo AdP

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