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BENDING CHART

The tonnage required per linear meter to bend mild steel with air bend dies
(tensile strength Rm=400 N/mm2).*

P = metric tons pressure for 90o bending work, [t/m]

S = thickness of metal, [mm]

Rw = inside radius, [mm]

V = width of Vee die opening, [mm]

B = minimal flange dimension, [mm]
siły gięcia



VRwBS0,50,811,21,51,822,5345681012152025
40,72,6410,5
6143,561013
81,55,225,5811,518
101,76,54,16,59,514,52126
1227,85,581217,521,533,5
162,710,46913162536
203,4137,510,513202952
254,2168,510,516234164
305201419345477
3562317304666
4072615264058103
457,52923365291
508,53221324682128
55936304275117
601039273969107
6510,84225366399142
7011,745335992132
7512,549315586123
8013,552295280116180
8514554976109170
9015584671103160
1001765416493144256
11018,5715984131233
12020785477120213333
140249166103183286
170291105585151235
VRwBS0,50,811,21,51,822,5345681012152025

*
- for stainless steel, Rm=800 N/mm2 (INOX)- required tonnage pressure × 1,5-2.
- for soft grades of aluminium - required tonnage pressure × 0,5
- for aluminium alloys - required tonnage pressure × 1

For bottom bending - required tonnage pressure × 3-5.


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