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.