AnsweredAssumed Answered

Bend Deduction Other Than 90 Deg

Question asked by Fred Vraj on Aug 25, 2015
Latest reply on Sep 18, 2015 by Bernie Daraz

Hi Everybody,

I have been having some issues with getting the right flat patterns that have bends with other than 90 Deg.


I have my own database of BD for ALU and Steel Sheets.

I do manual testing on the floor with my press guy and my 90 Deg samples are quit spot on.

The BD is very accurate on my 90 Deg Bends.


I use this formula below to get NON 90 Deg bend deduction value.


BD for 90°/ 90 X Needed Angle


EX: ( in mm for ALUMINIUM 2.5mm TH, Bend Angle 36° )

4.09 / 90 X 36 deg

0.045 X 36

BD = 1.62 mm


I got this formula from this forum but I am not sure if it has worked for me.

It just seems to be too simple to be truth.


Thank you for any help that you can offer.