Forming - Joggle Tonnage Calculation

[franklineng]

Does anyone have an calculation to estimate the tonnage required to form a joggle or offset bend in sheet metal? Most texts will give an estimate between 3 - 6x the tonnage for air bending?

 

[ajack1]

A good starting point is

Length of form (mm) X Material thickness (mm) X tensile strength (kg/mm2) X .4

This will give you an answer in kg.

If you start introducing any coining the value will soon shoot up.

 

[pirko]

Dear Sirs,
I have one question. I am looking for producer of Hot Joggling machine. Please have you this information. Thank you very much for reply. Best Regards Libor Pírko