Sheet Metal Bending Calculations...help

Thats the problem frnd...I got a lot of answers.... but the thing is all are discrete in formulae & results...all answers differ at least by 0.1-0.3mm. I am using a complex system which has gaps in prts of abt 2-5mm.Hence it affects the whole assembly of system.

"I am using a complex system which has gaps in prts of abt 2-5mm." is a long way from your original question, "I have to bend a sheet into L-Shape".

What exactly are you trying to accomplish? Precision sheet metal forming is more complicated than commonly assumed. 

I agree with pantaz and lynlynch: a simple 'L' shape (assume 90^O) with 100 and 928 legs (leg dims really do not matter) should yield an error of no more than one thickness of the metal... if you are doing it wrong the correct way.

Have you remembered to always use stretchout dim from inside the brake line? Can you post a sketch of this 'complex system'?

Gee, I thought it might be a complicated shape!

The one shown here would be complicated to build!

On your drawing, there seems to be an inconsistent shape at the curved part... a 150^O intersection with the 150^O plane? Is this 1 piece in the flat, and broken on a box brake? Or are there a number of parts welded after shaping?

No matter... regarding your original plea for formulae: there are rules and guidelines applicable to the bending and shaping of metal. lynlynch gave you these in #1. Review your drawing, review these guidelines, and apply. Stretchouts are taken from inside the bend, and still apply to bends other than 90^O.

According to that drawing, several features are physically impossible without subassemblies, and/or joined edges (i.e., welding).

Now show us the unfolded drawing with bend lines. 

Also,

It's hard enough to understand what you want without all the nonsensical abbreviations that could mean anything.This is an engineering site not a texting group.