Technology

We can help you choose the best tools for the job, or design special tooling according to the final product. To do this we need following information:

  • shape of the final product
  • type of your press brake, in case of machines which can be supplied with many tool holding types, like LVD, also the tool holding type
  • thickness and type of steel used
  • information about type or shape of tools you already have and could be used

Using computer design, we can tell you the number and size of tools that will be necessary to do the bending, we can also simulate the bending sequence using a Delem software.


Pressure table

The table shows bending pressure for sheets with air bending

F [t] – pressure on 1 m
r – inner radius on steel
b – minimum lenght of bending arm
V – vee size

 

RM = 45 kg / mm2
g V 4 6 7 8 10 12 14 16 18 20 25 32 40 50 63 80 100 125 140 160 200 250
b 2.8 4 5 5.5 7 8.5 10 11 13.5 14 17.5 22 28 35 45 55 71 89 100 113 140 180
r 0.7 1 1.1 1.3 1.6 2 2.3 2.6 3 3.3 4 5 6.5 8 10 13 16 20 23 26 33 40
0.5 4 3
0.6 6 4 3 3
0.8 7 6 5 4
1.0 13 10 8 6 5
1.2 13 10 8 6 5
1.5 13 10 9 8 7
2.0 25 20 17 14 13 10
2.5 29 24 21 16 12
3.0 38 32 24 17 13
4.0 47 34 25 19 14
5.0 57 42 32 24 18
6.0 65 48 36 26 20
8.0 94 69 50 38 29 25
10.0 84 63 48 41 35
12.0 130 96 72 62 53 40 31
16.0 139 120 101 76 58
20.0 126 95
RM = 70 kg / mm2
g V 4 6 7 8 10 12 14 16 18 20 25 32 40 50 63 80 100 125 140 160 200 250
b 2.8 4 5 5.5 7 8.5 10 11 13.5 14 17.5 22 28 35 45 55 71 89 100 113 140 180
r 0.7 1 1.1 1.3 1.6 2 2.3 2.6 3 3.3 4 5 6.5 8 10 13 16 20 23 26 33 40
0.5 7 4
0.6 10 6 5 4
0.8 1 9 8 6
1.0 19 16 13 10 8
1.2 20 15 12 10 8
1.5 20 16 14 12 10
2.0 39 31 26 22 20 15
2.5 44 38 33 25 18
3.0 58 50 37 27 20
4.0 73 53 39 30 22
5.0 89 66 49 37 27
6.0 101 75 55 41 31
8.0 147 107 78 59 45 39
10.0 131 98 74 64 55
12.0 202 149 112 97 82 62 48
16.0 217 187 157 118 90
20.0 196 148

Example: Sheet steel with RM 430-500 MPa with 6mm thickness can be bent on a V50mm size die, minimum arm of the bend is 35mm, inner radius on the steel will be 8mm, force necessary is 48 tons per meter.