Press brake bending tonnage and force calculator

This calculator is used for standard air bending process.



Legend:

F (Force), kN - total necessary force to execute the bend

s (thickness), mm - thickness of material to bend

V (opening), mm - opening of the bending die

h (resting part), mm - minimum necessary length of rest of the sheet before the bend

L (width of the bend), mm - main width of the part to be bended

R (radius), mm - internal radius of bended shape

TS - material tensile strength



The main formula to calculate

the bending force: F = (1,42 x TS x S2 x L)/1000 x V

internal radius: R = (5 x V) / 32 You can use this calculator to calculate necessary tonnage for press brake to perform the bending of necessary part. It means that you can verify the max. tonnage according to the technical specification of press brake or check the max. obtained tonnage by the press brake bending tooling compare to the necessary force. All bending tools have limits of force to be used.This calculator is used for standard air bending process.Legend:(Force), kN - total necessary force to execute the bend(thickness), mm - thickness of material to bend(opening), mm - opening of the bending die(resting part), mm - minimum necessary length of rest of the sheet before the bend(width of the bend), mm - main width of the part to be bended(radius), mm - internal radius of bended shape- material tensile strengthThe main formula to calculatethe bending force:internal radius:



Please use point, not comma if the number not integer



Sheet thickness (s), mm Tensile strength (TS), kg/mm2 Choose... Mild steel(45) SS AISI 304 (80) Aluminum(20) Die opening (V), mm Width of bending (L), mm Bending angle (ɑ) Choose... 30 45 60 90 120 135 165 Min. rest length (h), mm Bending force (F), tons Internal radius (R), mm



Please be informed that the present calculation only for general purposes. The type of metal and other indication points could be different and the calculation can't be done in the precision way. Press brake force chart Information chart for necessary tonnage for 1 meter bending width (L) for mild steel material: V H min R 0,5 0,8 1 1,2 1,5 1,8 2 2,5 3 3,5 4 4,5 5 6 7 8 9 10 12 15 18 20 6 5 1 2,5 6,5 10 8 6 1,3 2 5 8 11 10 7 1,7 1,5 4 6 9 13 12 9 2 3 5 7 11 16 15 12 2,7 4 6 9 13 16 20 15 3,3 4 7 10 13 19 26 18 4,2 5 7,5 10 14 21 30 22 5 6,5 8 12 19 24 32 23 5,4 7,5 11,6 17 23 30 37 25 5,8 10 14,5 20 26 33 42 29 6,7 13 17 23 29 35,5 45 32 7,5 16 21 27 33 48 50 36 8,3 19 24 30 43 58 60 43 10 20 25 36 49 64 70 50 11,5 21 31 42 55 69 80 57 13,5 27 37 48 60 75 90 64 15 32 42 54 66 95 100 71 17 38 48 60 86 134 130 93 22 37 46 66 103 149 180 130 30 33 48 75 107 133 200 145 33 43 67 97 119 250 180 42 54 77 95 Additional Press brake tools description Description of different types of bending tools to perform the various types of the sheetmetal bending.



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